TY  - JOUR
AU  - Filipović, Vuk
AU  - Babić Radić, Marija M.
AU  - Vuković, Jovana S.
AU  - Vukomanović, Marija
AU  - Rubert, Marina
AU  - Hofmann, Sandra
AU  - Müller, Ralph
AU  - Tomić, Simonida Lj.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5309
AB  - New composite 3D scaffolds were developed as a combination of synthetic polymer, poly(2-
hydroxyethyl methacrylate) (PHEMA), and a natural polymer, gelatin, with a ceramic component,
nanohydroxyapatite (ID nHAp) dopped with metal ions. The combination of a synthetic polymer,
to be able to tune the structure and the physicochemical and mechanical properties, and a natural
polymer, to ensure the specific biological functions of the scaffold, with inorganic filler was applied.
The goal was to make a new material with superior properties for applications in the biomedical
field which mimics as closely as possible the native bone extracellular matrix (ECM). Biodegrad able PHEMA hydrogel was obtained by crosslinking HEMA by poly(β-amino esters) (PBAE). The
scaffold’s physicochemical and mechanical properties, in vitro degradation, and biological activity
were assessed so to study the effects of the incorporation of nHAp in the (PHEMA/PBAE/gelatin)
hydrogel, as well as the effect of the different pore-forming methods. Cryogels had higher elasticity,
swelling, porosity, and percent of mass loss during degradation than the samples obtained by poro genation. The composite scaffolds had a higher mechanical strength, 10.14 MPa for the porogenated
samples and 5.87 MPa for the cryogels, but a slightly lower degree of swelling, percent of mass loss,
and porosity than the hybrid ones. All the scaffolds were nontoxic and had a high cell adhesion rate,
which was 15–20% higher in the composite samples. Cell metabolic activity after 2 and 7 days of
culture was higher in the composites, although not statistically different. After 28 days, cell metabolic
activity was similar in all scaffolds and the TCP control. No effect of integrating nHAp into the
scaffolds on osteogenic cell differentiation could be observed. Synergetic effects occurred which
influenced the mechanical behavior, structure, physicochemical properties, and interactions with
biological species.
PB  - MDPI
T2  - Polymers
T1  - Biodegradable Hydrogel Scaffolds Based on 2-Hydroxyethyl Methacrylate, Gelatin, Poly(β-amino esters), and Hydroxyapatite
VL  - 14
IS  - 1
SP  - 18
DO  - 10.3390/polym14010018
ER  - 

@article{
author = "Filipović, Vuk and Babić Radić, Marija M. and Vuković, Jovana S. and Vukomanović, Marija and Rubert, Marina and Hofmann, Sandra and Müller, Ralph and Tomić, Simonida Lj.",
year = "2022",
abstract = "New composite 3D scaffolds were developed as a combination of synthetic polymer, poly(2-
hydroxyethyl methacrylate) (PHEMA), and a natural polymer, gelatin, with a ceramic component,
nanohydroxyapatite (ID nHAp) dopped with metal ions. The combination of a synthetic polymer,
to be able to tune the structure and the physicochemical and mechanical properties, and a natural
polymer, to ensure the specific biological functions of the scaffold, with inorganic filler was applied.
The goal was to make a new material with superior properties for applications in the biomedical
field which mimics as closely as possible the native bone extracellular matrix (ECM). Biodegrad able PHEMA hydrogel was obtained by crosslinking HEMA by poly(β-amino esters) (PBAE). The
scaffold’s physicochemical and mechanical properties, in vitro degradation, and biological activity
were assessed so to study the effects of the incorporation of nHAp in the (PHEMA/PBAE/gelatin)
hydrogel, as well as the effect of the different pore-forming methods. Cryogels had higher elasticity,
swelling, porosity, and percent of mass loss during degradation than the samples obtained by poro genation. The composite scaffolds had a higher mechanical strength, 10.14 MPa for the porogenated
samples and 5.87 MPa for the cryogels, but a slightly lower degree of swelling, percent of mass loss,
and porosity than the hybrid ones. All the scaffolds were nontoxic and had a high cell adhesion rate,
which was 15–20% higher in the composite samples. Cell metabolic activity after 2 and 7 days of
culture was higher in the composites, although not statistically different. After 28 days, cell metabolic
activity was similar in all scaffolds and the TCP control. No effect of integrating nHAp into the
scaffolds on osteogenic cell differentiation could be observed. Synergetic effects occurred which
influenced the mechanical behavior, structure, physicochemical properties, and interactions with
biological species.",
publisher = "MDPI",
journal = "Polymers",
title = "Biodegradable Hydrogel Scaffolds Based on 2-Hydroxyethyl Methacrylate, Gelatin, Poly(β-amino esters), and Hydroxyapatite",
volume = "14",
number = "1",
pages = "18",
doi = "10.3390/polym14010018"
}

Filipović, V., Babić Radić, M. M., Vuković, J. S., Vukomanović, M., Rubert, M., Hofmann, S., Müller, R.,& Tomić, S. Lj.. (2022). Biodegradable Hydrogel Scaffolds Based on 2-Hydroxyethyl Methacrylate, Gelatin, Poly(β-amino esters), and Hydroxyapatite. in Polymers
MDPI., 14(1), 18.
https://doi.org/10.3390/polym14010018

Filipović V, Babić Radić MM, Vuković JS, Vukomanović M, Rubert M, Hofmann S, Müller R, Tomić SL. Biodegradable Hydrogel Scaffolds Based on 2-Hydroxyethyl Methacrylate, Gelatin, Poly(β-amino esters), and Hydroxyapatite. in Polymers. 2022;14(1):18.
doi:10.3390/polym14010018 .

Filipović, Vuk, Babić Radić, Marija M., Vuković, Jovana S., Vukomanović, Marija, Rubert, Marina, Hofmann, Sandra, Müller, Ralph, Tomić, Simonida Lj., "Biodegradable Hydrogel Scaffolds Based on 2-Hydroxyethyl Methacrylate, Gelatin, Poly(β-amino esters), and Hydroxyapatite" in Polymers, 14, no. 1 (2022):18,
https://doi.org/10.3390/polym14010018 . .

TY  - JOUR
AU  - Babić Radić, Marija M.
AU  - Filipović, Vuk V.
AU  - Vuković, Jovana S.
AU  - Vukomanović, Marija
AU  - Rubert, Marina
AU  - Hofmann, Sandra
AU  - Müller, Ralph
AU  - Tomić, Simonida Lj.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5391
AB  - Our goal was to create bioimitated scaffolding materials for biomedical purposes. The guiding idea was that we used an interpenetrating structural hierarchy of natural extracellular matrix as a “pattern” to design hydrogel scaffolds that show favorable properties for tissue regeneration. Polymeric hydrogel scaffolds are made in a simple, environmentally friendly way without additional functionalization. Gelatin and 2-hydroxyethyl methacrylate were selected to prepare interpenetrating polymeric networks and linear alginate chains were added as an interpenetrant to study their influence on the scaffold’s functionalities. Cryogelation and porogenation methods were used to obtain the designed scaffolding biomaterials. The scaffold’s structural, morphological, and mechanical properties, in vitro degradation, and cell viability properties were assessed to study the effects of the preparation method and alginate loading. Apatite as an inorganic agent was incorporated into cryogelated scaffolds to perform an extensive biological assay. Cryogelated scaffolds possess superior functionalities essential for tissue regeneration: fully hydrophilicity, degradability and mechanical features (2.08–9.75 MPa), and an optimal LDH activity. Furthermore, cryogelated scaffolds loaded with apatite showed good cell adhesion capacity, biocompatibility, and non-toxic behavior. All scaffolds performed equally in terms of metabolic activity and osteoconductivity. Cryogelated scaffolds with/without HAp could represent a new advance to promote osteoconductivity and enhance hard tissue repair. The obtained series of scaffolding biomaterials described here can provide a wide range of potential applications in the area of biomedical engineering.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Polymers
T1  - Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials
VL  - 14
IS  - 15
SP  - 3112
DO  - 10.3390/polym14153112
ER  - 

@article{
author = "Babić Radić, Marija M. and Filipović, Vuk V. and Vuković, Jovana S. and Vukomanović, Marija and Rubert, Marina and Hofmann, Sandra and Müller, Ralph and Tomić, Simonida Lj.",
year = "2022",
abstract = "Our goal was to create bioimitated scaffolding materials for biomedical purposes. The guiding idea was that we used an interpenetrating structural hierarchy of natural extracellular matrix as a “pattern” to design hydrogel scaffolds that show favorable properties for tissue regeneration. Polymeric hydrogel scaffolds are made in a simple, environmentally friendly way without additional functionalization. Gelatin and 2-hydroxyethyl methacrylate were selected to prepare interpenetrating polymeric networks and linear alginate chains were added as an interpenetrant to study their influence on the scaffold’s functionalities. Cryogelation and porogenation methods were used to obtain the designed scaffolding biomaterials. The scaffold’s structural, morphological, and mechanical properties, in vitro degradation, and cell viability properties were assessed to study the effects of the preparation method and alginate loading. Apatite as an inorganic agent was incorporated into cryogelated scaffolds to perform an extensive biological assay. Cryogelated scaffolds possess superior functionalities essential for tissue regeneration: fully hydrophilicity, degradability and mechanical features (2.08–9.75 MPa), and an optimal LDH activity. Furthermore, cryogelated scaffolds loaded with apatite showed good cell adhesion capacity, biocompatibility, and non-toxic behavior. All scaffolds performed equally in terms of metabolic activity and osteoconductivity. Cryogelated scaffolds with/without HAp could represent a new advance to promote osteoconductivity and enhance hard tissue repair. The obtained series of scaffolding biomaterials described here can provide a wide range of potential applications in the area of biomedical engineering.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Polymers",
title = "Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials",
volume = "14",
number = "15",
pages = "3112",
doi = "10.3390/polym14153112"
}

Babić Radić, M. M., Filipović, V. V., Vuković, J. S., Vukomanović, M., Rubert, M., Hofmann, S., Müller, R.,& Tomić, S. Lj.. (2022). Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials. in Polymers
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 14(15), 3112.
https://doi.org/10.3390/polym14153112

Babić Radić MM, Filipović VV, Vuković JS, Vukomanović M, Rubert M, Hofmann S, Müller R, Tomić SL. Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials. in Polymers. 2022;14(15):3112.
doi:10.3390/polym14153112 .

Babić Radić, Marija M., Filipović, Vuk V., Vuković, Jovana S., Vukomanović, Marija, Rubert, Marina, Hofmann, Sandra, Müller, Ralph, Tomić, Simonida Lj., "Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials" in Polymers, 14, no. 15 (2022):3112,
https://doi.org/10.3390/polym14153112 . .

TY  - JOUR
AU  - Babić Radić, Marija M.
AU  - Filipović, Vuk
AU  - Vukomanović, Marija
AU  - Nikodinović Runić, Jasmina
AU  - Tomić, Simonida
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5311
AB  - The design and evaluation of novel 2-hydroxyethyl methacrylate/gelatin/alginate/
graphene oxide hydrogels as innovative scaffolding biomaterials, which concurrently are the suitable
drug delivery carrier, was proposed. The hydrogels were prepared by the adapted porogen leaching
method; this is also the first time this method has been used to incorporate nanocolloidal graphene
oxide through the hydrogel and simultaneously form porous structures. The effects of a material’s
composition on its chemical, morphological, mechanical, and swelling properties, as well as on
cell viability and in vitro degradation, were assessed using Fourier transform infrared spectroscopy
(FTIR), scanning electron microscopy (SEM), measurements of Young’s modulus, gravimetric method
and MTT test, respectively. The engineered hydrogels show good swelling capacity, fully hydrophilic
surfaces, tunable porosity (from 56 to 76%) and mechanical properties (from 1.69 to 4.78 MPa),
curcumin entrapment efficiency above 99% and excellent curcumin release performances. In vitro
cytotoxicity on healthy human fibroblast (MRC5 cells) by MTT test reveal that the materials are
nontoxic and biocompatible, proposing novel hydrogels for in vivo clinical evaluation to optimize
tissue regeneration treatments by coupling the hydrogels with cells and different active agents to
create material/biofactor hybrids with new levels of biofunctionality.
PB  - MDPI
T2  - Gels
T1  - Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials
VL  - 8
IS  - 22
SP  - 2
EP  - 14
DO  - 10.3390/gels8010022
ER  - 

@article{
author = "Babić Radić, Marija M. and Filipović, Vuk and Vukomanović, Marija and Nikodinović Runić, Jasmina and Tomić, Simonida",
year = "2022",
abstract = "The design and evaluation of novel 2-hydroxyethyl methacrylate/gelatin/alginate/
graphene oxide hydrogels as innovative scaffolding biomaterials, which concurrently are the suitable
drug delivery carrier, was proposed. The hydrogels were prepared by the adapted porogen leaching
method; this is also the first time this method has been used to incorporate nanocolloidal graphene
oxide through the hydrogel and simultaneously form porous structures. The effects of a material’s
composition on its chemical, morphological, mechanical, and swelling properties, as well as on
cell viability and in vitro degradation, were assessed using Fourier transform infrared spectroscopy
(FTIR), scanning electron microscopy (SEM), measurements of Young’s modulus, gravimetric method
and MTT test, respectively. The engineered hydrogels show good swelling capacity, fully hydrophilic
surfaces, tunable porosity (from 56 to 76%) and mechanical properties (from 1.69 to 4.78 MPa),
curcumin entrapment efficiency above 99% and excellent curcumin release performances. In vitro
cytotoxicity on healthy human fibroblast (MRC5 cells) by MTT test reveal that the materials are
nontoxic and biocompatible, proposing novel hydrogels for in vivo clinical evaluation to optimize
tissue regeneration treatments by coupling the hydrogels with cells and different active agents to
create material/biofactor hybrids with new levels of biofunctionality.",
publisher = "MDPI",
journal = "Gels",
title = "Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials",
volume = "8",
number = "22",
pages = "2-14",
doi = "10.3390/gels8010022"
}

Babić Radić, M. M., Filipović, V., Vukomanović, M., Nikodinović Runić, J.,& Tomić, S.. (2022). Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials. in Gels
MDPI., 8(22), 2-14.
https://doi.org/10.3390/gels8010022

Babić Radić MM, Filipović V, Vukomanović M, Nikodinović Runić J, Tomić S. Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials. in Gels. 2022;8(22):2-14.
doi:10.3390/gels8010022 .

Babić Radić, Marija M., Filipović, Vuk, Vukomanović, Marija, Nikodinović Runić, Jasmina, Tomić, Simonida, "Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials" in Gels, 8, no. 22 (2022):2-14,
https://doi.org/10.3390/gels8010022 . .

TY  - JOUR
AU  - Antić, Katarina M.
AU  - Onjia, Antonije
AU  - Vasiljević-Radović, Dana
AU  - Veličković, Zlate
AU  - Tomić, Simonida Lj.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4897
AB  - The adsorption of Ni2+ ions from water solutions by using hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA) was studied. Hydrogel synthesis was optimized with response surface methodology (RSM). The hydrogel with the best adsorption capacity towards Ni2+ ions was chosen for further experiments. The hydrogel was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis before and after the adsorption of Ni2+ ions. Batch equilibrium experiments were conducted to investigate the influence of solution pH, hydrogel weight, ionic strength, adsorption time, temperature and initial concentration of nickel ions on the adsorption. Time-dependent adsorption fitted the best to the pseudo-second-order kinetic model. A thermodynamic study revealed that the adsorption was an exothermic and non-spontaneous process. Five isotherm models were studied, and the best fit was obtained with the Redlich–Peterson model. Consecutive adsorption/desorption studies indicated that the HEA/IA hydrogel can be efficiently used as a sorbent for the removal of Ni2+ ions from the water solution. This study develops a potential adsorbent for the effective removal of trace nickel ions.
PB  - MDPI
T2  - Gels
T1  - Removal of nickel ions from aqueous solutions by 2-hydroxyethyl acrylate/itaconic acid hydrogels optimized with response surface methodology
VL  - 7
IS  - 4
IS  - 225
DO  - 10.3390/gels7040225
ER  - 

@article{
author = "Antić, Katarina M. and Onjia, Antonije and Vasiljević-Radović, Dana and Veličković, Zlate and Tomić, Simonida Lj.",
year = "2021",
abstract = "The adsorption of Ni2+ ions from water solutions by using hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA) was studied. Hydrogel synthesis was optimized with response surface methodology (RSM). The hydrogel with the best adsorption capacity towards Ni2+ ions was chosen for further experiments. The hydrogel was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis before and after the adsorption of Ni2+ ions. Batch equilibrium experiments were conducted to investigate the influence of solution pH, hydrogel weight, ionic strength, adsorption time, temperature and initial concentration of nickel ions on the adsorption. Time-dependent adsorption fitted the best to the pseudo-second-order kinetic model. A thermodynamic study revealed that the adsorption was an exothermic and non-spontaneous process. Five isotherm models were studied, and the best fit was obtained with the Redlich–Peterson model. Consecutive adsorption/desorption studies indicated that the HEA/IA hydrogel can be efficiently used as a sorbent for the removal of Ni2+ ions from the water solution. This study develops a potential adsorbent for the effective removal of trace nickel ions.",
publisher = "MDPI",
journal = "Gels",
title = "Removal of nickel ions from aqueous solutions by 2-hydroxyethyl acrylate/itaconic acid hydrogels optimized with response surface methodology",
volume = "7",
number = "4, 225",
doi = "10.3390/gels7040225"
}

Antić, K. M., Onjia, A., Vasiljević-Radović, D., Veličković, Z.,& Tomić, S. Lj.. (2021). Removal of nickel ions from aqueous solutions by 2-hydroxyethyl acrylate/itaconic acid hydrogels optimized with response surface methodology. in Gels
MDPI., 7(4).
https://doi.org/10.3390/gels7040225

Antić KM, Onjia A, Vasiljević-Radović D, Veličković Z, Tomić SL. Removal of nickel ions from aqueous solutions by 2-hydroxyethyl acrylate/itaconic acid hydrogels optimized with response surface methodology. in Gels. 2021;7(4).
doi:10.3390/gels7040225 .

Antić, Katarina M., Onjia, Antonije, Vasiljević-Radović, Dana, Veličković, Zlate, Tomić, Simonida Lj., "Removal of nickel ions from aqueous solutions by 2-hydroxyethyl acrylate/itaconic acid hydrogels optimized with response surface methodology" in Gels, 7, no. 4 (2021),
https://doi.org/10.3390/gels7040225 . .

TY  - JOUR
AU  - Marković, Maja
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Ugrinović, Vukašin
AU  - Bošković-Vragolović, Nevenka
AU  - Pjanović, Rada
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3641
AB  - pH sensitive, nontoxic, and biocompatible poly(methacrylic) acid (PMAA) based soft networks have been extensively used in the design of systems for targeted drug delivery. Still, their highly hydrophilic nature limits their potential to be used as a carrier of poorly water-soluble substances. With the aim to overcome this limitation, the present study details a new approach for modification of PMAA based carriers using two amphiphilic components: casein and liposomes. The FTIR analysis revealed structural features of each component as well as the synergetic effect that originated from the formation of specific interactions. Namely, hydrophobic interactions between the poorly water-soluble model drug (caffeine) and casein enabled caffeine encapsulation and controlled release, while addition of liposomes ensured better control of the release rate. The morphological properties of the carriers, swelling behavior, and release kinetics of caffeine were investigated depending on the variable synthesis parameters (neutralization degree of methacrylic acid, concentration of caffeine, presence/absence of liposomes) in two different media simulating the pH environment of human intestines and stomach. The data obtained from in vitro caffeine release were correlated and analyzed in detail using several mathematical models, indicating significant potential of investigated carriers for targeted delivery and controlled release of poorly water-soluble substances.
PB  - John Wiley and Sons Inc
T2  - Polymer Engineering and Science
T1  - Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance
VL  - 60
SP  - 2496
EP  - 2510
DO  - 10.1002/pen.25487
ER  - 

@article{
author = "Marković, Maja and Panić, Vesna and Šešlija, Sanja and Spasojević, Pavle and Ugrinović, Vukašin and Bošković-Vragolović, Nevenka and Pjanović, Rada",
year = "2020",
abstract = "pH sensitive, nontoxic, and biocompatible poly(methacrylic) acid (PMAA) based soft networks have been extensively used in the design of systems for targeted drug delivery. Still, their highly hydrophilic nature limits their potential to be used as a carrier of poorly water-soluble substances. With the aim to overcome this limitation, the present study details a new approach for modification of PMAA based carriers using two amphiphilic components: casein and liposomes. The FTIR analysis revealed structural features of each component as well as the synergetic effect that originated from the formation of specific interactions. Namely, hydrophobic interactions between the poorly water-soluble model drug (caffeine) and casein enabled caffeine encapsulation and controlled release, while addition of liposomes ensured better control of the release rate. The morphological properties of the carriers, swelling behavior, and release kinetics of caffeine were investigated depending on the variable synthesis parameters (neutralization degree of methacrylic acid, concentration of caffeine, presence/absence of liposomes) in two different media simulating the pH environment of human intestines and stomach. The data obtained from in vitro caffeine release were correlated and analyzed in detail using several mathematical models, indicating significant potential of investigated carriers for targeted delivery and controlled release of poorly water-soluble substances.",
publisher = "John Wiley and Sons Inc",
journal = "Polymer Engineering and Science",
title = "Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance",
volume = "60",
pages = "2496-2510",
doi = "10.1002/pen.25487"
}

Marković, M., Panić, V., Šešlija, S., Spasojević, P., Ugrinović, V., Bošković-Vragolović, N.,& Pjanović, R.. (2020). Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance. in Polymer Engineering and Science
John Wiley and Sons Inc., 60, 2496-2510.
https://doi.org/10.1002/pen.25487

Marković M, Panić V, Šešlija S, Spasojević P, Ugrinović V, Bošković-Vragolović N, Pjanović R. Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance. in Polymer Engineering and Science. 2020;60:2496-2510.
doi:10.1002/pen.25487 .

Marković, Maja, Panić, Vesna, Šešlija, Sanja, Spasojević, Pavle, Ugrinović, Vukašin, Bošković-Vragolović, Nevenka, Pjanović, Rada, "Modification of hydrophilic polymer network to design a carrier for a poorly water-soluble substance" in Polymer Engineering and Science, 60 (2020):2496-2510,
https://doi.org/10.1002/pen.25487 . .

TY  - JOUR
AU  - Stefanović, Ivan
AU  - Džunuzović, Jasna
AU  - Džunuzović, Enis S.
AU  - Dapčević, Aleksandra
AU  - Šešlija, Sanja
AU  - Balanč, Bojana D.
AU  - Dobrzyńska-Mizera, Monika
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3971
AB  - This work was focused on the synthesis of polyurethane networks (PUNs) based on
polycaprolactone (PCL) as soft segment (SS) and Boltorn® aliphatic hyperbranched
polyester of the second pseudo generation and 4,4′-diphenylmethane diisocyanate
(MDI) as the parts of the hard segments (HS), by a two-step solution polymerization.
In order to find the best ratio between HS and SS to achieve good thermal
and mechanical properties, suitable hydrophobicity and morphology of the PUNs,
various experimental analyses were conducted. The obtained results revealed that
features of the PUNs highly depend on the PCL content. The increase in the PCL
content leads to the increase in thermal stability, hydrophobicity and appearance of
the microphase separation, but on the other side, it also leads to the decrease in storage
modulus in the rubbery plateau, crosslinking density and glass transition temperatures
of PUNs. This work shows that features of PUNs can be easily adjusted for
a specific application by careful selection of the SS and HS ratio.
PB  - Springer
T2  - Polymer Bulletin
T1  - Composition-property relationship of polyurethane networks based on polycaprolactone diol
DO  - 10.1007/s00289-020-03473-0
ER  - 

@article{
author = "Stefanović, Ivan and Džunuzović, Jasna and Džunuzović, Enis S. and Dapčević, Aleksandra and Šešlija, Sanja and Balanč, Bojana D. and Dobrzyńska-Mizera, Monika",
year = "2020",
abstract = "This work was focused on the synthesis of polyurethane networks (PUNs) based on
polycaprolactone (PCL) as soft segment (SS) and Boltorn® aliphatic hyperbranched
polyester of the second pseudo generation and 4,4′-diphenylmethane diisocyanate
(MDI) as the parts of the hard segments (HS), by a two-step solution polymerization.
In order to find the best ratio between HS and SS to achieve good thermal
and mechanical properties, suitable hydrophobicity and morphology of the PUNs,
various experimental analyses were conducted. The obtained results revealed that
features of the PUNs highly depend on the PCL content. The increase in the PCL
content leads to the increase in thermal stability, hydrophobicity and appearance of
the microphase separation, but on the other side, it also leads to the decrease in storage
modulus in the rubbery plateau, crosslinking density and glass transition temperatures
of PUNs. This work shows that features of PUNs can be easily adjusted for
a specific application by careful selection of the SS and HS ratio.",
publisher = "Springer",
journal = "Polymer Bulletin",
title = "Composition-property relationship of polyurethane networks based on polycaprolactone diol",
doi = "10.1007/s00289-020-03473-0"
}

Stefanović, I., Džunuzović, J., Džunuzović, E. S., Dapčević, A., Šešlija, S., Balanč, B. D.,& Dobrzyńska-Mizera, M.. (2020). Composition-property relationship of polyurethane networks based on polycaprolactone diol. in Polymer Bulletin
Springer..
https://doi.org/10.1007/s00289-020-03473-0

Stefanović I, Džunuzović J, Džunuzović ES, Dapčević A, Šešlija S, Balanč BD, Dobrzyńska-Mizera M. Composition-property relationship of polyurethane networks based on polycaprolactone diol. in Polymer Bulletin. 2020;.
doi:10.1007/s00289-020-03473-0 .

Stefanović, Ivan, Džunuzović, Jasna, Džunuzović, Enis S., Dapčević, Aleksandra, Šešlija, Sanja, Balanč, Bojana D., Dobrzyńska-Mizera, Monika, "Composition-property relationship of polyurethane networks based on polycaprolactone diol" in Polymer Bulletin (2020),
https://doi.org/10.1007/s00289-020-03473-0 . .

TY  - JOUR
AU  - Marković, Maja D.
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Veljović, Đorđe
AU  - Pjanović, Rada
AU  - Panić, Vesna
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2990
AB  - The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.
PB  - Elsevier
T2  - European Polymer Journal
T1  - Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties
VL  - 113
SP  - 276
EP  - 288
DO  - 10.1016/j.eurpolymj.2019.01.065
ER  - 

@article{
author = "Marković, Maja D. and Spasojević, Pavle and Šešlija, Sanja and Popović, Ivanka G. and Veljović, Đorđe and Pjanović, Rada and Panić, Vesna",
year = "2019",
abstract = "The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.",
publisher = "Elsevier",
journal = "European Polymer Journal",
title = "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties",
volume = "113",
pages = "276-288",
doi = "10.1016/j.eurpolymj.2019.01.065"
}

Marković, M. D., Spasojević, P., Šešlija, S., Popović, I. G., Veljović, Đ., Pjanović, R.,& Panić, V.. (2019). Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal
Elsevier., 113, 276-288.
https://doi.org/10.1016/j.eurpolymj.2019.01.065

Marković MD, Spasojević P, Šešlija S, Popović IG, Veljović Đ, Pjanović R, Panić V. Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal. 2019;113:276-288.
doi:10.1016/j.eurpolymj.2019.01.065 .

Marković, Maja D., Spasojević, Pavle, Šešlija, Sanja, Popović, Ivanka G., Veljović, Đorđe, Pjanović, Rada, Panić, Vesna, "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties" in European Polymer Journal, 113 (2019):276-288,
https://doi.org/10.1016/j.eurpolymj.2019.01.065 . .

TY  - JOUR
AU  - Mandić, Mina
AU  - Spasić, Jelena
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Ćosović, Vladan
AU  - O'Connor, Kevin E.
AU  - Nikodinović-Runić, Jasmina
AU  - Đokić, Lidija
AU  - Jeremić, Sanja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2955
AB  - Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.
PB  - Elsevier
T2  - Polymer Degradation and Stability
T1  - Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil
VL  - 162
SP  - 160
EP  - 168
DO  - 10.1016/j.polymdegradstab.2019.02.012
ER  - 

@article{
author = "Mandić, Mina and Spasić, Jelena and Ponjavić, Marijana and Nikolić, Marija S. and Ćosović, Vladan and O'Connor, Kevin E. and Nikodinović-Runić, Jasmina and Đokić, Lidija and Jeremić, Sanja",
year = "2019",
abstract = "Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.",
publisher = "Elsevier",
journal = "Polymer Degradation and Stability",
title = "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil",
volume = "162",
pages = "160-168",
doi = "10.1016/j.polymdegradstab.2019.02.012"
}

Mandić, M., Spasić, J., Ponjavić, M., Nikolić, M. S., Ćosović, V., O'Connor, K. E., Nikodinović-Runić, J., Đokić, L.,& Jeremić, S.. (2019). Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability
Elsevier., 162, 160-168.
https://doi.org/10.1016/j.polymdegradstab.2019.02.012

Mandić M, Spasić J, Ponjavić M, Nikolić MS, Ćosović V, O'Connor KE, Nikodinović-Runić J, Đokić L, Jeremić S. Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability. 2019;162:160-168.
doi:10.1016/j.polymdegradstab.2019.02.012 .

Mandić, Mina, Spasić, Jelena, Ponjavić, Marijana, Nikolić, Marija S., Ćosović, Vladan, O'Connor, Kevin E., Nikodinović-Runić, Jasmina, Đokić, Lidija, Jeremić, Sanja, "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil" in Polymer Degradation and Stability, 162 (2019):160-168,
https://doi.org/10.1016/j.polymdegradstab.2019.02.012 . .

TY  - JOUR
AU  - Mandić, Mina
AU  - Spasić, Jelena
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Ćosović, Vladan
AU  - O'Connor, Kevin E.
AU  - Nikodinović-Runić, Jasmina
AU  - Đokić, Lidija
AU  - Jeremić, Sanja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2956
AB  - Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.
PB  - Elsevier
T2  - Polymer Degradation and Stability
T1  - Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil
VL  - 162
SP  - 160
EP  - 168
DO  - 10.1016/j.polymdegradstab.2019.02.012
ER  - 

@article{
author = "Mandić, Mina and Spasić, Jelena and Ponjavić, Marijana and Nikolić, Marija S. and Ćosović, Vladan and O'Connor, Kevin E. and Nikodinović-Runić, Jasmina and Đokić, Lidija and Jeremić, Sanja",
year = "2019",
abstract = "Petrochemical plastics are generally recalcitrant to microbial degradation and accumulate in the environment. Biodegradable polymers obtained synthetically like poly(ε-caprolactone) (PCL) or polyhydroxyalkanoates (PHA), obtained biotechnologically, have shown great potential as a replacement for petroleum-based plastics. Nevertheless, their biodegradation and environmental faith have been less examined. In this study, thin films of PCL (200 μm) and medium chain length PHA (mcl-PHA, 70 M fraction of 3-hydroxyoctanoate and 30 M fraction of 3-hydroxydecanoate, 600 μm) were exposed to total protein preparations (extracellular proteins combined with a crude cell extract) of soil isolates Pseudomonas chlororaphis B-561 and Streptomyces sp. BV315 that had been grown on waste cooking oil as a sole carbon source. Biodegradation potential of two polyesters was evaluated in buffer with total protein preparations and in a laboratory compost model system augmented with selected bacteria. Overall, PCL showed better biodegradation properties in comparison to mcl-PHA. Both materials showed surface erosion after 4-weeks of exposure to total protein preparations of both strains, with a moderate weight loss of 1.3% when P. chlororaphis B-561 was utilized. In laboratory compost model system PCL and mcl-PHA showed significant weight loss ranging from 13 to 17% when Streptomyces sp. BV315 culture was used. Similar weight loss of PCL and mcl-PHA was achieved for 4 and 8 weeks, respectively indicating slower degradation of mcl-PHA. Growth on waste cooking oil as a sole carbon source increased the potential of both tested strains to degrade PCL and mcl-PHA, making them good candidates for augmentation of compost cultures in waste management of both waste cooking oils and biodegradable polymers.",
publisher = "Elsevier",
journal = "Polymer Degradation and Stability",
title = "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil",
volume = "162",
pages = "160-168",
doi = "10.1016/j.polymdegradstab.2019.02.012"
}

Mandić, M., Spasić, J., Ponjavić, M., Nikolić, M. S., Ćosović, V., O'Connor, K. E., Nikodinović-Runić, J., Đokić, L.,& Jeremić, S.. (2019). Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability
Elsevier., 162, 160-168.
https://doi.org/10.1016/j.polymdegradstab.2019.02.012

Mandić M, Spasić J, Ponjavić M, Nikolić MS, Ćosović V, O'Connor KE, Nikodinović-Runić J, Đokić L, Jeremić S. Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil. in Polymer Degradation and Stability. 2019;162:160-168.
doi:10.1016/j.polymdegradstab.2019.02.012 .

Mandić, Mina, Spasić, Jelena, Ponjavić, Marijana, Nikolić, Marija S., Ćosović, Vladan, O'Connor, Kevin E., Nikodinović-Runić, Jasmina, Đokić, Lidija, Jeremić, Sanja, "Biodegradation of poly(ε-caprolactone) (PCL) and medium chain length polyhydroxyalkanoate (mcl-PHA) using whole cells and cell free protein preparations of Pseudomonas and Streptomyces strains grown on waste cooking oil" in Polymer Degradation and Stability, 162 (2019):160-168,
https://doi.org/10.1016/j.polymdegradstab.2019.02.012 . .

TY  - CONF
AU  - Pergal, Marija
AU  - Kodranov, Igor
AU  - Špirkova, Milena
AU  - Manojlović, Dragan
AU  - Ostojić, Sanja
AU  - Knežević, Nikola Ž.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5769
AB  - Polyurethane (PU) networks based on poly(dimethylsiloxane) (PDMS) and hyperbranched polyester (HBP) possess unique properties such as chemical stability, good thermal behavior, good surface and mechanical properties, making these materials good candidates for coating applications. The silica addition in polymer typically leads to a significant improvement of mechanical and thermal properties due to good filler dispersion, good compatibility with the matrix, and the presence of a strong interaction between reinforcements and the polymer matrix.
PB  - Serbian Ceramic Society
C3  - Program and the book of abstracts - The Eight Serbian Ceramic Society Conference »Advanced Ceramics and Application«, New Frontiers in Multifunctional Material Science and Processing
T1  - Thermal and Thermomechanical Properties of Organic-Inorganic Nanocomposites Prepared from Polyurethane Network and Mesoporous Silica Nanoparticles
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_cer_5769
ER  - 

@conference{
author = "Pergal, Marija and Kodranov, Igor and Špirkova, Milena and Manojlović, Dragan and Ostojić, Sanja and Knežević, Nikola Ž.",
year = "2019",
abstract = "Polyurethane (PU) networks based on poly(dimethylsiloxane) (PDMS) and hyperbranched polyester (HBP) possess unique properties such as chemical stability, good thermal behavior, good surface and mechanical properties, making these materials good candidates for coating applications. The silica addition in polymer typically leads to a significant improvement of mechanical and thermal properties due to good filler dispersion, good compatibility with the matrix, and the presence of a strong interaction between reinforcements and the polymer matrix.",
publisher = "Serbian Ceramic Society",
journal = "Program and the book of abstracts - The Eight Serbian Ceramic Society Conference »Advanced Ceramics and Application«, New Frontiers in Multifunctional Material Science and Processing",
title = "Thermal and Thermomechanical Properties of Organic-Inorganic Nanocomposites Prepared from Polyurethane Network and Mesoporous Silica Nanoparticles",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_cer_5769"
}

Pergal, M., Kodranov, I., Špirkova, M., Manojlović, D., Ostojić, S.,& Knežević, N. Ž.. (2019). Thermal and Thermomechanical Properties of Organic-Inorganic Nanocomposites Prepared from Polyurethane Network and Mesoporous Silica Nanoparticles. in Program and the book of abstracts - The Eight Serbian Ceramic Society Conference »Advanced Ceramics and Application«, New Frontiers in Multifunctional Material Science and Processing
Serbian Ceramic Society., 66-66.
https://hdl.handle.net/21.15107/rcub_cer_5769

Pergal M, Kodranov I, Špirkova M, Manojlović D, Ostojić S, Knežević NŽ. Thermal and Thermomechanical Properties of Organic-Inorganic Nanocomposites Prepared from Polyurethane Network and Mesoporous Silica Nanoparticles. in Program and the book of abstracts - The Eight Serbian Ceramic Society Conference »Advanced Ceramics and Application«, New Frontiers in Multifunctional Material Science and Processing. 2019;:66-66.
https://hdl.handle.net/21.15107/rcub_cer_5769 .

Pergal, Marija, Kodranov, Igor, Špirkova, Milena, Manojlović, Dragan, Ostojić, Sanja, Knežević, Nikola Ž., "Thermal and Thermomechanical Properties of Organic-Inorganic Nanocomposites Prepared from Polyurethane Network and Mesoporous Silica Nanoparticles" in Program and the book of abstracts - The Eight Serbian Ceramic Society Conference »Advanced Ceramics and Application«, New Frontiers in Multifunctional Material Science and Processing (2019):66-66,
https://hdl.handle.net/21.15107/rcub_cer_5769 .

TY  - CONF
AU  - Marković, Bojana
AU  - Stefanović, Ivan
AU  - Popović, Aleksandar R.
AU  - Ignjatović, Nenad
AU  - Nastasović, Aleksandra
PY  - 2019
UR  - http://dais.sanu.ac.rs/123456789/7007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3325
AB  - Recent advances in material technologies have resulted in the preparation of novel polymer/clay composites with improved thermal, mechanical, optoelectronic/ magnetic properties and increased biodegradability [1]. In this study, six samples of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME) nanocomposites with organically-modified montmorillonite clay Cloisite 30B® (C30B), were prepared via suspension copolymerization. In order to obtain nanocomposites with fine spherical beads of regular shape and satisfying thermal stability the optimization of the synthesis conditions was performed. Firstly, the influence of the poly(N-vinyl pyrrolidone) (PVP) quantity in the aqueous phase was varied (1, 3 and 5 wt.%) at a constant stirring rate of 250 rpm and constant clay content C30B (10 wt.%). In the second phase of the optimization of the preparation, samples with a constant composition of the composite reaction mixture (5 wt.% PVP and 10 wt.% C30B) at a stirring rate of 250, 325 and 400 rpm, were prepared. According to the obtained results, it was concluded that the optimal conditions for preparation of these composites are 5 wt.% of PVP and 400 rpm. The prepared nanocomposites were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) in air. The structure of the prepared nanocomposites was confirmed with FTIR spectroscopy. According to the obtained SEM microphotographs the fine spherical beads, with desired size and homogeneous morphology, were prepared. Furthermore, SEM analysis was also showed that clay nanoparticles are homogeneously dispersed both inside surface and cross-section area. The incorporation of C30B clay increased the thermal stability of the prepared polymer/clay nanocomposites in comparison to the pure PGME copolymer.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Optimization of the preparation of novel polymer/clay nanocomposites
SP  - 114
EP  - 114
UR  - https://hdl.handle.net/21.15107/rcub_dais_7007
ER  - 

@conference{
author = "Marković, Bojana and Stefanović, Ivan and Popović, Aleksandar R. and Ignjatović, Nenad and Nastasović, Aleksandra",
year = "2019",
abstract = "Recent advances in material technologies have resulted in the preparation of novel polymer/clay composites with improved thermal, mechanical, optoelectronic/ magnetic properties and increased biodegradability [1]. In this study, six samples of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME) nanocomposites with organically-modified montmorillonite clay Cloisite 30B® (C30B), were prepared via suspension copolymerization. In order to obtain nanocomposites with fine spherical beads of regular shape and satisfying thermal stability the optimization of the synthesis conditions was performed. Firstly, the influence of the poly(N-vinyl pyrrolidone) (PVP) quantity in the aqueous phase was varied (1, 3 and 5 wt.%) at a constant stirring rate of 250 rpm and constant clay content C30B (10 wt.%). In the second phase of the optimization of the preparation, samples with a constant composition of the composite reaction mixture (5 wt.% PVP and 10 wt.% C30B) at a stirring rate of 250, 325 and 400 rpm, were prepared. According to the obtained results, it was concluded that the optimal conditions for preparation of these composites are 5 wt.% of PVP and 400 rpm. The prepared nanocomposites were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) in air. The structure of the prepared nanocomposites was confirmed with FTIR spectroscopy. According to the obtained SEM microphotographs the fine spherical beads, with desired size and homogeneous morphology, were prepared. Furthermore, SEM analysis was also showed that clay nanoparticles are homogeneously dispersed both inside surface and cross-section area. The incorporation of C30B clay increased the thermal stability of the prepared polymer/clay nanocomposites in comparison to the pure PGME copolymer.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Optimization of the preparation of novel polymer/clay nanocomposites",
pages = "114-114",
url = "https://hdl.handle.net/21.15107/rcub_dais_7007"
}

Marković, B., Stefanović, I., Popović, A. R., Ignjatović, N.,& Nastasović, A.. (2019). Optimization of the preparation of novel polymer/clay nanocomposites. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 114-114.
https://hdl.handle.net/21.15107/rcub_dais_7007

Marković B, Stefanović I, Popović AR, Ignjatović N, Nastasović A. Optimization of the preparation of novel polymer/clay nanocomposites. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:114-114.
https://hdl.handle.net/21.15107/rcub_dais_7007 .

Marković, Bojana, Stefanović, Ivan, Popović, Aleksandar R., Ignjatović, Nenad, Nastasović, Aleksandra, "Optimization of the preparation of novel polymer/clay nanocomposites" in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):114-114,
https://hdl.handle.net/21.15107/rcub_dais_7007 .

TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Stefanović, Ivan
AU  - Džunuzović, Enis S.
AU  - Dapčević, Aleksandra
AU  - Šešlija, Sanja
AU  - Balanč, Bojana D.
AU  - Lamae, Giuseppe C.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3220
AB  - A series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn® aliphatic hyperbranched polyester of the second pseudo generation as crosslinking agent was prepared by a two-step polymerization in solution. The chemical structure of the PU networks was analyzed by Fourier transform infrared spectroscopy, while XRD analysis revealed that these samples are amorphous. Swelling measurements, water absorption study, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, mechanical tests and scanning electron microscope revealed that, swelling behavior, hydrophobicity, thermal and mechanical features and morphology of PU networks show clear dependence on polycaprolactone content. The increase of the SS content induced appearance of the microphase separated morphology, increase of thermal stability, elongation at break, hydrophobicity and swelling ability in tetrahydrofuran and toluene, but at the same time it is responsible for the decrease of crosslinking density, glass transition temperatures, rigidity, tensile strength and Young’s modulus of PU networks. Scanning electron microscope images of the fracture surfaces of PU networks show that their surface is rough, irregular, with flake-like structure, where size of flakes increases with increasing SS content. These results indicate that by choosing adequate SS content, PU coatings with diverse features based on polycaprolactone and Boltorn® aliphatic hyperbranched polyester can be designed for appropriate and desired application
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation
IS  - 137
SP  - 105305
DO  - 10.1016/j.porgcoat.2019.105305
ER  - 

@article{
author = "Džunuzović, Jasna and Stefanović, Ivan and Džunuzović, Enis S. and Dapčević, Aleksandra and Šešlija, Sanja and Balanč, Bojana D. and Lamae, Giuseppe C.",
year = "2019",
abstract = "A series of environmentally friendly polyurethane (PU) networks based on polycaprolactone as soft segment (SS) and Boltorn® aliphatic hyperbranched polyester of the second pseudo generation as crosslinking agent was prepared by a two-step polymerization in solution. The chemical structure of the PU networks was analyzed by Fourier transform infrared spectroscopy, while XRD analysis revealed that these samples are amorphous. Swelling measurements, water absorption study, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, mechanical tests and scanning electron microscope revealed that, swelling behavior, hydrophobicity, thermal and mechanical features and morphology of PU networks show clear dependence on polycaprolactone content. The increase of the SS content induced appearance of the microphase separated morphology, increase of thermal stability, elongation at break, hydrophobicity and swelling ability in tetrahydrofuran and toluene, but at the same time it is responsible for the decrease of crosslinking density, glass transition temperatures, rigidity, tensile strength and Young’s modulus of PU networks. Scanning electron microscope images of the fracture surfaces of PU networks show that their surface is rough, irregular, with flake-like structure, where size of flakes increases with increasing SS content. These results indicate that by choosing adequate SS content, PU coatings with diverse features based on polycaprolactone and Boltorn® aliphatic hyperbranched polyester can be designed for appropriate and desired application",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation",
number = "137",
pages = "105305",
doi = "10.1016/j.porgcoat.2019.105305"
}

Džunuzović, J., Stefanović, I., Džunuzović, E. S., Dapčević, A., Šešlija, S., Balanč, B. D.,& Lamae, G. C.. (2019). Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation. in Progress in Organic Coatings
Elsevier.(137), 105305.
https://doi.org/10.1016/j.porgcoat.2019.105305

Džunuzović J, Stefanović I, Džunuzović ES, Dapčević A, Šešlija S, Balanč BD, Lamae GC. Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation. in Progress in Organic Coatings. 2019;(137):105305.
doi:10.1016/j.porgcoat.2019.105305 .

Džunuzović, Jasna, Stefanović, Ivan, Džunuzović, Enis S., Dapčević, Aleksandra, Šešlija, Sanja, Balanč, Bojana D., Lamae, Giuseppe C., "Polyurethane networks based on polycaprolactone and hyperbranched polyester: Structural, thermal and mechanical investigation" in Progress in Organic Coatings, no. 137 (2019):105305,
https://doi.org/10.1016/j.porgcoat.2019.105305 . .

TY  - JOUR
AU  - Stefanović, Ivan
AU  - Dostanić, Jasmina
AU  - Lončarević, Davor
AU  - Vasiljević-Radović, Dana
AU  - Ostojić, Sanja
AU  - Marković, Smilja B.
AU  - Pergal, Marija
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2692
AB  - This work is focused on preparation of poly(urethane-siloxane)/titanium-dioxide nanocomposites (PUSNs) with enhanced features. PUSNs were prepared by the in situ polymerization reaction using titanium-dioxide as a nano-filler in different amounts (1, 2, 3 and 5 wt.%) with respect to the poly(urethane-siloxane) (PUS) matrix. PUS copolymer was based on α,ω-dihy-droxy-ethoxypropyl-poly(dimethylsiloxane), 4,4’-methylenediphenyldiisocyanate and 1,4-bu-tanediole. In order to investigate the influence of TiO 2 content on the structure, UV resistance, thermal properties, hydrophobicity and morphology of the prepared PUSNs, FTIR spectroscopy, UV-Vis diffuse-reflectance spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), contact angle measurements, surface free energy (SFE) analysis, water absorption, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were performed. The PUSNs showed excellent UV resistance, high hydrophobicity, low surface free energy and also higher thermal stability and rougher surface and cross-section relief structure as compared to the pure PUS copolymer. Based on the obtained results it can be concluded that prepared PUSNs could be potentially used as protective coatings. © 2019, Association of Chemists and Chemical Engineers of Serbia. All rights reserved.
AB  - Ovaj rad je fokusiran na pripremu poli(uretan-siloksan)/titan-dioksid nanokompozita (PUSN) sa poboljšanim svojstvima. PUSN nanokompoziti su 
bili pripremani postupkom in situ polimerizacije koristeći titan-dioksid kao nanopunilac u različitim količinama (1, 2, 3 i 5 mas.%) u odnosu na poli(ure tan-siloksansku) (PUS) matricu. PUS kopolimer je bio na bazi α,ω-dihi droksi-etoksipropil-poli(dimetilsiloksana), 4,4’-metilendifenildiizocijanata i 
1,4-butandiola. Sa ciljem da se ispita uticaj sadržaja TiO2 na strukturu, UV otpornost, termička svojstva, hidrofobnost i morfologiju dobijenih PUSN 
nanokompozita, primenjene su sledeće tehnike: FTIR spektroskopija, UV-Vis difuzna-refleksna spektroskopija, diferencijalna skenirajuća kalorimetrija (DSC), termogravimetrijska analiza (TGA), merenje kontaktnih uglova, određivanje slobodne površinske energije (SFE), određivanje apsorpcije vode, skenirajuća elektronska mikroskopija (SEM) i mikroskopija atomskih sila (AFM). Dobijeni PUSN uzorci su pokazali izuzetnu otpornost na UV 
zračenje, visoku hidrofobnost, nisku slobodnu površinsku energiju i takođe poboljšanu termičku stabilnost i hrapaviju površinsku i unutrašnju reljefnu 
strukturu u odnosu na čist PUS kopolimer. Na osnovu dobijenih rezultata zaključeno je da se dobijeni PUSN nanokompoziti mogu potencijalno koristiti kao zaštitni premazi.
PB  - Belgrade : Association of the Chemical Engineers of Serbia
T2  - Hemijska Industrija
T1  - Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites
VL  - 73
IS  - 1
SP  - 13
EP  - 24
DO  - 10.2298/HEMIND180530002S
ER  - 

@article{
author = "Stefanović, Ivan and Dostanić, Jasmina and Lončarević, Davor and Vasiljević-Radović, Dana and Ostojić, Sanja and Marković, Smilja B. and Pergal, Marija",
year = "2019",
abstract = "This work is focused on preparation of poly(urethane-siloxane)/titanium-dioxide nanocomposites (PUSNs) with enhanced features. PUSNs were prepared by the in situ polymerization reaction using titanium-dioxide as a nano-filler in different amounts (1, 2, 3 and 5 wt.%) with respect to the poly(urethane-siloxane) (PUS) matrix. PUS copolymer was based on α,ω-dihy-droxy-ethoxypropyl-poly(dimethylsiloxane), 4,4’-methylenediphenyldiisocyanate and 1,4-bu-tanediole. In order to investigate the influence of TiO 2 content on the structure, UV resistance, thermal properties, hydrophobicity and morphology of the prepared PUSNs, FTIR spectroscopy, UV-Vis diffuse-reflectance spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), contact angle measurements, surface free energy (SFE) analysis, water absorption, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were performed. The PUSNs showed excellent UV resistance, high hydrophobicity, low surface free energy and also higher thermal stability and rougher surface and cross-section relief structure as compared to the pure PUS copolymer. Based on the obtained results it can be concluded that prepared PUSNs could be potentially used as protective coatings. © 2019, Association of Chemists and Chemical Engineers of Serbia. All rights reserved., Ovaj rad je fokusiran na pripremu poli(uretan-siloksan)/titan-dioksid nanokompozita (PUSN) sa poboljšanim svojstvima. PUSN nanokompoziti su 
bili pripremani postupkom in situ polimerizacije koristeći titan-dioksid kao nanopunilac u različitim količinama (1, 2, 3 i 5 mas.%) u odnosu na poli(ure tan-siloksansku) (PUS) matricu. PUS kopolimer je bio na bazi α,ω-dihi droksi-etoksipropil-poli(dimetilsiloksana), 4,4’-metilendifenildiizocijanata i 
1,4-butandiola. Sa ciljem da se ispita uticaj sadržaja TiO2 na strukturu, UV otpornost, termička svojstva, hidrofobnost i morfologiju dobijenih PUSN 
nanokompozita, primenjene su sledeće tehnike: FTIR spektroskopija, UV-Vis difuzna-refleksna spektroskopija, diferencijalna skenirajuća kalorimetrija (DSC), termogravimetrijska analiza (TGA), merenje kontaktnih uglova, određivanje slobodne površinske energije (SFE), određivanje apsorpcije vode, skenirajuća elektronska mikroskopija (SEM) i mikroskopija atomskih sila (AFM). Dobijeni PUSN uzorci su pokazali izuzetnu otpornost na UV 
zračenje, visoku hidrofobnost, nisku slobodnu površinsku energiju i takođe poboljšanu termičku stabilnost i hrapaviju površinsku i unutrašnju reljefnu 
strukturu u odnosu na čist PUS kopolimer. Na osnovu dobijenih rezultata zaključeno je da se dobijeni PUSN nanokompoziti mogu potencijalno koristiti kao zaštitni premazi.",
publisher = "Belgrade : Association of the Chemical Engineers of Serbia",
journal = "Hemijska Industrija",
title = "Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites",
volume = "73",
number = "1",
pages = "13-24",
doi = "10.2298/HEMIND180530002S"
}

Stefanović, I., Dostanić, J., Lončarević, D., Vasiljević-Radović, D., Ostojić, S., Marković, S. B.,& Pergal, M.. (2019). Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites. in Hemijska Industrija
Belgrade : Association of the Chemical Engineers of Serbia., 73(1), 13-24.
https://doi.org/10.2298/HEMIND180530002S

Stefanović I, Dostanić J, Lončarević D, Vasiljević-Radović D, Ostojić S, Marković SB, Pergal M. Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites. in Hemijska Industrija. 2019;73(1):13-24.
doi:10.2298/HEMIND180530002S .

Stefanović, Ivan, Dostanić, Jasmina, Lončarević, Davor, Vasiljević-Radović, Dana, Ostojić, Sanja, Marković, Smilja B., Pergal, Marija, "Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites" in Hemijska Industrija, 73, no. 1 (2019):13-24,
https://doi.org/10.2298/HEMIND180530002S . .

TY  - CONF
AU  - Stefanović, Ivan
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6202
AB  - Series of poly(urethane-siloxane) nanocomposites (PUNC) was prepared with the in situ
polymerization, based on 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the
comonomers of the hard segments (HS) and α,ω–dihydroxy ethoxy
poly(dimethylsiloxane) (EO-PDMS) as the part of the soft segments (SS). PUNC series
was composed of five samples of different HS contents (from 10 to 50 wt.%).
Organomodified montmorillonite clay (Cloisite 30B®) was used as nanofiller in the
amount of 1 wt.% (relative to the total weight of reactants), within prepared PUNCs. The
effect of the addition of nanoclay on structure, surface properties and morphology of
these PUNCs was investigated.
The obtained FTIR spectra confirm successful preparation and incorporation of nanoclay
particles inside of PUNC samples with different compositions i.e HS/SS ratio.
Incorporation of the EO-PDMS segments and nanoclay particles i.e. enrichment of the
surface of these PUNC films with Si and O atoms allows highly hydrophobic surface of
the PUNCs. Samples with the highest content of SS had the best hydrophobicity and the
highest contact angle values with water, formamide and diiodomethane. According to
the SEM images PUNCs exhibited two-phase morphology that was more pronounced in
samples with higher HS content due to the higher level of microphase separation.
Moreover, the addition of nanoclay particles has led to the appearance of more prominent
cross-sectional morphology [1,2].
PB  - Belgrade : Serbian Chemical Society
PB  - Belgrade : Serbian Young Chemists’ Club
C3  - Book of abstracts - 7th Conference of the Young Chemists of Serbia, 2nd  November 2019, Belgrade
T1  - Nanoclay reinforcement of poly(urethane-siloxane) copolymers
SP  - 35
EP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_cer_6202
ER  - 

@conference{
author = "Stefanović, Ivan",
year = "2019",
abstract = "Series of poly(urethane-siloxane) nanocomposites (PUNC) was prepared with the in situ
polymerization, based on 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the
comonomers of the hard segments (HS) and α,ω–dihydroxy ethoxy
poly(dimethylsiloxane) (EO-PDMS) as the part of the soft segments (SS). PUNC series
was composed of five samples of different HS contents (from 10 to 50 wt.%).
Organomodified montmorillonite clay (Cloisite 30B®) was used as nanofiller in the
amount of 1 wt.% (relative to the total weight of reactants), within prepared PUNCs. The
effect of the addition of nanoclay on structure, surface properties and morphology of
these PUNCs was investigated.
The obtained FTIR spectra confirm successful preparation and incorporation of nanoclay
particles inside of PUNC samples with different compositions i.e HS/SS ratio.
Incorporation of the EO-PDMS segments and nanoclay particles i.e. enrichment of the
surface of these PUNC films with Si and O atoms allows highly hydrophobic surface of
the PUNCs. Samples with the highest content of SS had the best hydrophobicity and the
highest contact angle values with water, formamide and diiodomethane. According to
the SEM images PUNCs exhibited two-phase morphology that was more pronounced in
samples with higher HS content due to the higher level of microphase separation.
Moreover, the addition of nanoclay particles has led to the appearance of more prominent
cross-sectional morphology [1,2].",
publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists’ Club",
journal = "Book of abstracts - 7th Conference of the Young Chemists of Serbia, 2nd  November 2019, Belgrade",
title = "Nanoclay reinforcement of poly(urethane-siloxane) copolymers",
pages = "35-35",
url = "https://hdl.handle.net/21.15107/rcub_cer_6202"
}

Stefanović, I.. (2019). Nanoclay reinforcement of poly(urethane-siloxane) copolymers. in Book of abstracts - 7th Conference of the Young Chemists of Serbia, 2nd  November 2019, Belgrade
Belgrade : Serbian Chemical Society., 35-35.
https://hdl.handle.net/21.15107/rcub_cer_6202

Stefanović I. Nanoclay reinforcement of poly(urethane-siloxane) copolymers. in Book of abstracts - 7th Conference of the Young Chemists of Serbia, 2nd  November 2019, Belgrade. 2019;:35-35.
https://hdl.handle.net/21.15107/rcub_cer_6202 .

Stefanović, Ivan, "Nanoclay reinforcement of poly(urethane-siloxane) copolymers" in Book of abstracts - 7th Conference of the Young Chemists of Serbia, 2nd  November 2019, Belgrade (2019):35-35,
https://hdl.handle.net/21.15107/rcub_cer_6202 .

TY  - JOUR
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Lončarević, Branka
AU  - Todorović, Nina
AU  - Pergal, Marija
AU  - Ciric, J.
AU  - Loos, K.
AU  - Beškoski, Vladimir
AU  - Vrvić, Miroslav
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2503
AB  - The production of levan by Bacillus licheniformis NS032 in a medium based on sugar beet molasses was studied. High polysaccharide yields were produced by using diluted molasses (100-140 g/L of total sugars) with the addition of commercial sucrose up to 200 g/L of total sugars, as well as K2HPO4. A levan yield of 532 g/L was obtained on a medium optimized by response surface methodology, containing 62.6% of sugar originating from molasses, and 4.66 g/L of phosphate, with initial pH value of 7.2. In comparison to the media with 200 and 400 g/L sucrose, in the molasses optimized medium, the observed bacterial growth was faster, while the maximum production of polysaccharide was achieved over a shorter time interval (48 h). The polysaccharide produced in molasses medium had a weight average molecular weight of 5.82 x 10(6) Da, degree of branching 12.68%, viscosity of 0.24 dL/g, and based on methylation analysis and NMR data, it did not significantly differ from levan obtained in the medium with 200 g/L sucrose.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium
VL  - 121
SP  - 142
EP  - 151
DO  - 10.1016/j.ijbiomac.2018.10.019
ER  - 

@article{
author = "Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Lončarević, Branka and Todorović, Nina and Pergal, Marija and Ciric, J. and Loos, K. and Beškoski, Vladimir and Vrvić, Miroslav",
year = "2019",
abstract = "The production of levan by Bacillus licheniformis NS032 in a medium based on sugar beet molasses was studied. High polysaccharide yields were produced by using diluted molasses (100-140 g/L of total sugars) with the addition of commercial sucrose up to 200 g/L of total sugars, as well as K2HPO4. A levan yield of 532 g/L was obtained on a medium optimized by response surface methodology, containing 62.6% of sugar originating from molasses, and 4.66 g/L of phosphate, with initial pH value of 7.2. In comparison to the media with 200 and 400 g/L sucrose, in the molasses optimized medium, the observed bacterial growth was faster, while the maximum production of polysaccharide was achieved over a shorter time interval (48 h). The polysaccharide produced in molasses medium had a weight average molecular weight of 5.82 x 10(6) Da, degree of branching 12.68%, viscosity of 0.24 dL/g, and based on methylation analysis and NMR data, it did not significantly differ from levan obtained in the medium with 200 g/L sucrose.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium",
volume = "121",
pages = "142-151",
doi = "10.1016/j.ijbiomac.2018.10.019"
}

Gojgić-Cvijović, G., Jakovljević, D., Lončarević, B., Todorović, N., Pergal, M., Ciric, J., Loos, K., Beškoski, V.,& Vrvić, M.. (2019). Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium. in International Journal of Biological Macromolecules
Elsevier., 121, 142-151.
https://doi.org/10.1016/j.ijbiomac.2018.10.019

Gojgić-Cvijović G, Jakovljević D, Lončarević B, Todorović N, Pergal M, Ciric J, Loos K, Beškoski V, Vrvić M. Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium. in International Journal of Biological Macromolecules. 2019;121:142-151.
doi:10.1016/j.ijbiomac.2018.10.019 .

Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Lončarević, Branka, Todorović, Nina, Pergal, Marija, Ciric, J., Loos, K., Beškoski, Vladimir, Vrvić, Miroslav, "Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium" in International Journal of Biological Macromolecules, 121 (2019):142-151,
https://doi.org/10.1016/j.ijbiomac.2018.10.019 . .

TY  - JOUR
AU  - Gojgić-Cvijović, Gordana
AU  - Jakovljević, Dragica
AU  - Lončarević, Branka
AU  - Todorović, Nina
AU  - Pergal, Marija
AU  - Ciric, J.
AU  - Loos, K.
AU  - Beškoski, Vladimir
AU  - Vrvić, Miroslav
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2926
AB  - The production of levan by Bacillus licheniformis NS032 in a medium based on sugar beet molasses was studied. High polysaccharide yields were produced by using diluted molasses (100-140 g/L of total sugars) with the addition of commercial sucrose up to 200 g/L of total sugars, as well as K2HPO4. A levan yield of 532 g/L was obtained on a medium optimized by response surface methodology, containing 62.6% of sugar originating from molasses, and 4.66 g/L of phosphate, with initial pH value of 7.2. In comparison to the media with 200 and 400 g/L sucrose, in the molasses optimized medium, the observed bacterial growth was faster, while the maximum production of polysaccharide was achieved over a shorter time interval (48 h). The polysaccharide produced in molasses medium had a weight average molecular weight of 5.82 x 10(6) Da, degree of branching 12.68%, viscosity of 0.24 dL/g, and based on methylation analysis and NMR data, it did not significantly differ from levan obtained in the medium with 200 g/L sucrose.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium
VL  - 121
SP  - 142
EP  - 151
DO  - 10.1016/j.ijbiomac.2018.10.019
ER  - 

@article{
author = "Gojgić-Cvijović, Gordana and Jakovljević, Dragica and Lončarević, Branka and Todorović, Nina and Pergal, Marija and Ciric, J. and Loos, K. and Beškoski, Vladimir and Vrvić, Miroslav",
year = "2019",
abstract = "The production of levan by Bacillus licheniformis NS032 in a medium based on sugar beet molasses was studied. High polysaccharide yields were produced by using diluted molasses (100-140 g/L of total sugars) with the addition of commercial sucrose up to 200 g/L of total sugars, as well as K2HPO4. A levan yield of 532 g/L was obtained on a medium optimized by response surface methodology, containing 62.6% of sugar originating from molasses, and 4.66 g/L of phosphate, with initial pH value of 7.2. In comparison to the media with 200 and 400 g/L sucrose, in the molasses optimized medium, the observed bacterial growth was faster, while the maximum production of polysaccharide was achieved over a shorter time interval (48 h). The polysaccharide produced in molasses medium had a weight average molecular weight of 5.82 x 10(6) Da, degree of branching 12.68%, viscosity of 0.24 dL/g, and based on methylation analysis and NMR data, it did not significantly differ from levan obtained in the medium with 200 g/L sucrose.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium",
volume = "121",
pages = "142-151",
doi = "10.1016/j.ijbiomac.2018.10.019"
}

Gojgić-Cvijović, G., Jakovljević, D., Lončarević, B., Todorović, N., Pergal, M., Ciric, J., Loos, K., Beškoski, V.,& Vrvić, M.. (2019). Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium. in International Journal of Biological Macromolecules
Elsevier., 121, 142-151.
https://doi.org/10.1016/j.ijbiomac.2018.10.019

Gojgić-Cvijović G, Jakovljević D, Lončarević B, Todorović N, Pergal M, Ciric J, Loos K, Beškoski V, Vrvić M. Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium. in International Journal of Biological Macromolecules. 2019;121:142-151.
doi:10.1016/j.ijbiomac.2018.10.019 .

Gojgić-Cvijović, Gordana, Jakovljević, Dragica, Lončarević, Branka, Todorović, Nina, Pergal, Marija, Ciric, J., Loos, K., Beškoski, Vladimir, Vrvić, Miroslav, "Production of levan by Bacillus licheniformis NS032 in sugar beet molasses-based medium" in International Journal of Biological Macromolecules, 121 (2019):142-151,
https://doi.org/10.1016/j.ijbiomac.2018.10.019 . .

TY  - CONF
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Lučić Škorić, Marija
AU  - Kalagasidis Krušić, Melina
AU  - Santagata, G.
AU  - Malinconico, M.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2406
AB  - The present paper reports on pectin based films modified with carboxymethyl cellulose intended for food packaging. The films are prepared by solvent-casting method with different carboxymethyl cellulose content and cross-linker concentration (Ca2+ ions) in the presence of glycerol as a plasticizer. FT-IR spectra of the prepared films propose that carboxyl group from pectin are mainly involved in interactions with CMC, whereas −OH groups are mainly involved in self-associated hydrogen bonding of neat polymers. Further, an addition of carboxymethyl cellulose improved mechanical properties compared to pure pectin films, while TGA analysis confirmed satisfying thermal stability regarding their potential application as packaging material. Finally, water vapor permeability values are in the range of 1.32 × 10−7 up to 2.03 × 10−7 g/m h Pa.
PB  - Wiley-VCH Verlag
C3  - Macromolecular Symposia
T1  - Pectin/Carboxymethylcellulose Films as a Potential Food Packaging Material
VL  - 378
IS  - 1
SP  - 1600163
DO  - 10.1002/masy.201600163
ER  - 

@conference{
author = "Šešlija, Sanja and Nešić, Aleksandra and Lučić Škorić, Marija and Kalagasidis Krušić, Melina and Santagata, G. and Malinconico, M.",
year = "2018",
abstract = "The present paper reports on pectin based films modified with carboxymethyl cellulose intended for food packaging. The films are prepared by solvent-casting method with different carboxymethyl cellulose content and cross-linker concentration (Ca2+ ions) in the presence of glycerol as a plasticizer. FT-IR spectra of the prepared films propose that carboxyl group from pectin are mainly involved in interactions with CMC, whereas −OH groups are mainly involved in self-associated hydrogen bonding of neat polymers. Further, an addition of carboxymethyl cellulose improved mechanical properties compared to pure pectin films, while TGA analysis confirmed satisfying thermal stability regarding their potential application as packaging material. Finally, water vapor permeability values are in the range of 1.32 × 10−7 up to 2.03 × 10−7 g/m h Pa.",
publisher = "Wiley-VCH Verlag",
journal = "Macromolecular Symposia",
title = "Pectin/Carboxymethylcellulose Films as a Potential Food Packaging Material",
volume = "378",
number = "1",
pages = "1600163",
doi = "10.1002/masy.201600163"
}

Šešlija, S., Nešić, A., Lučić Škorić, M., Kalagasidis Krušić, M., Santagata, G.,& Malinconico, M.. (2018). Pectin/Carboxymethylcellulose Films as a Potential Food Packaging Material. in Macromolecular Symposia
Wiley-VCH Verlag., 378(1), 1600163.
https://doi.org/10.1002/masy.201600163

Šešlija S, Nešić A, Lučić Škorić M, Kalagasidis Krušić M, Santagata G, Malinconico M. Pectin/Carboxymethylcellulose Films as a Potential Food Packaging Material. in Macromolecular Symposia. 2018;378(1):1600163.
doi:10.1002/masy.201600163 .

Šešlija, Sanja, Nešić, Aleksandra, Lučić Škorić, Marija, Kalagasidis Krušić, Melina, Santagata, G., Malinconico, M., "Pectin/Carboxymethylcellulose Films as a Potential Food Packaging Material" in Macromolecular Symposia, 378, no. 1 (2018):1600163,
https://doi.org/10.1002/masy.201600163 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Kalagasidis Krušić, Melina
AU  - Veličković, Sava J.
AU  - Avolio, Roberto
AU  - Santagata, Gabriella
AU  - Malinconico, Mario
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2473
AB  - The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.
PB  - Elsevier
T2  - Food Hydrocolloids
T1  - Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation
VL  - 77
SP  - 494
EP  - 501
DO  - 10.1016/j.foodhyd.2017.10.027
ER  - 

@article{
author = "Šešlija, Sanja and Nešić, Aleksandra and Ružić, Jovana and Kalagasidis Krušić, Melina and Veličković, Sava J. and Avolio, Roberto and Santagata, Gabriella and Malinconico, Mario",
year = "2018",
abstract = "The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.",
publisher = "Elsevier",
journal = "Food Hydrocolloids",
title = "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation",
volume = "77",
pages = "494-501",
doi = "10.1016/j.foodhyd.2017.10.027"
}

Šešlija, S., Nešić, A., Ružić, J., Kalagasidis Krušić, M., Veličković, S. J., Avolio, R., Santagata, G.,& Malinconico, M.. (2018). Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids
Elsevier., 77, 494-501.
https://doi.org/10.1016/j.foodhyd.2017.10.027

Šešlija S, Nešić A, Ružić J, Kalagasidis Krušić M, Veličković SJ, Avolio R, Santagata G, Malinconico M. Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids. 2018;77:494-501.
doi:10.1016/j.foodhyd.2017.10.027 .

Šešlija, Sanja, Nešić, Aleksandra, Ružić, Jovana, Kalagasidis Krušić, Melina, Veličković, Sava J., Avolio, Roberto, Santagata, Gabriella, Malinconico, Mario, "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation" in Food Hydrocolloids, 77 (2018):494-501,
https://doi.org/10.1016/j.foodhyd.2017.10.027 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Kalagasidis Krušić, Melina
AU  - Veličković, Sava
AU  - Avolio, Roberto
AU  - Santagata, Gabriella
AU  - Malinconico, Mario
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4289
AB  - The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.
PB  - Elsevier
T2  - Food Hydrocolloids
T1  - Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation
VL  - 77
SP  - 494
EP  - 501
DO  - 10.1016/j.foodhyd.2017.10.027
ER  - 

@article{
author = "Šešlija, Sanja and Nešić, Aleksandra and Ružić, Jovana and Kalagasidis Krušić, Melina and Veličković, Sava and Avolio, Roberto and Santagata, Gabriella and Malinconico, Mario",
year = "2018",
abstract = "The aim of this study was the development of novel polysaccharide based films intended to be used as edible food packaging material. The films were prepared by solution casting method using highly methoxylated pectin (PEC) and poly(ethylene glycol) (PEG) of various molecular weights (400, 600 and 1000 gmol(-1)) in different ratios (5:1, 3:1 and 1:1). The film formation was supported by hydrogen bonding between PEC and PEG, which was evidenced by means of ATR-FTIR and NMR analysis. TGA revealed that generally PEG behaves like a pro-degrading agent for pectin, except in the case of PEC/PEG film with a ratio of 1:1. Furthermore, DSC thermograms indicated that PEG1000 exists as a separate phase in the pectin matrix while the formulations with PEG400 and PEG600 showed mainly amorphous morphology. The addition of PEG enhanced the plasticization of PEC films, as evidenced by progressive decreasing of the glass transition temperature values (T-g). The tensile test measurements showed that increasing concentration of PEG produced weaker and more flexibile films. Due to the increased molecular mobility, the pectin phase became more permeable to water vapor as the PEG concentration increased. The obtained results showed that the combination of both polymers resulted in interesting bio -inspired edible films with the potential to compete with commercially used synthetic package materials.",
publisher = "Elsevier",
journal = "Food Hydrocolloids",
title = "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation",
volume = "77",
pages = "494-501",
doi = "10.1016/j.foodhyd.2017.10.027"
}

Šešlija, S., Nešić, A., Ružić, J., Kalagasidis Krušić, M., Veličković, S., Avolio, R., Santagata, G.,& Malinconico, M.. (2018). Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids
Elsevier., 77, 494-501.
https://doi.org/10.1016/j.foodhyd.2017.10.027

Šešlija S, Nešić A, Ružić J, Kalagasidis Krušić M, Veličković S, Avolio R, Santagata G, Malinconico M. Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation. in Food Hydrocolloids. 2018;77:494-501.
doi:10.1016/j.foodhyd.2017.10.027 .

Šešlija, Sanja, Nešić, Aleksandra, Ružić, Jovana, Kalagasidis Krušić, Melina, Veličković, Sava, Avolio, Roberto, Santagata, Gabriella, Malinconico, Mario, "Edible blend films of pectin and poly(ethylene glycol): Preparation and physico-chemical evaluation" in Food Hydrocolloids, 77 (2018):494-501,
https://doi.org/10.1016/j.foodhyd.2017.10.027 . .

TY  - JOUR
AU  - Ugrinović, Vukašin
AU  - Panić, Vesna
AU  - Veljović, Đorđe
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Janaćković, Đorđe
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2279
AB  - Goals. The goal of this study was a development of biocompatible composite hydrogels, structurally similar to native bone tissue, by incorporation of ~60 wt % of calcium hydroxyapatite (HA) into a matrix of hydrogels. Also, a possibility to control swelling kinetic and equilibrium swelling degree (SDeq) of hydrogels, by altering the degree of neutralization of the precursor (DN) was examined. Methods. Composite hydrogels, based on HA and poly(methacrylic acid) (PMAA), were synthesized by free-radical polymerization with different DN. Theoretical content of HA in synthesized composites was 60 wt %. Composites were synthesized by methods of dynamic mechanical analysis and scanning electron microscopy. SDeq and swelling kinetic were examined in distilled water and simulated body fluid. Results. Morphological observations revealed uniform distribution and strong bond of spherical HA particles within the polymer matrix. Swelling analyses demonstrated that SDeq is directly proportional to DN, while rheological examinations indicated inverse proportion between DN and storage modulus, but due to the HA particles inclusion, mechanical properties of composites were significantly better compared to monophasic PMAA hydrogels. Significance. Simple method of synthesis of composite hydrogels with high content of filler nanoparticles is presented. Incorporation of HA nanoparticles significantly improved mechanical properties of hydrogels, while at the same time was demonstrated a possibility to control swelling kinetic by influencing the DN.
AB  - Ciljevi - Cilj ove studije bio je razvoj biokompatibilnih kompozitnih hidrogelova, koji su slične strukture kao prirodno koštano tkivo, inkorporacijom ∼60 mas % kalcijum-hidroksiapatita (HA) u matricu hidro-gela. Takođe, ispitan je uticaj neutralizacije prekursora polimerne mreže na kinetiku bubrenja i ravnotežni stepen bubrenja (SDeq).Metode - Kompozitni hidrogelovi, sastavljeni od HA i poli(metakrilne kiseline) (PMAA), sintetisani su slobodno-radikalskom polimerizacijom, pri različitim stepenima neutralizacije prekursora (SN). Svi sintetisani kompoziti sadrže visok maseni udeo HA (~60 mas %). Kompoziti su okarakterisani metodama skenirajuće elektronske mikroskopije (SEM) i dinamičko-mehaničke analize (DMA). SDeq i kinetika bubrenja ispitivani su u destilovanoj vodi i simuliranoj telesnoj tečnosti (SBF). Rezultati - Morfološka ispitivanja pokazala su uniformnu raspodelu i dobru povezanost sferičnih čestica apatita sa polimernom matricom. Analiza procesa bubrenja pokazala je proporcionalnu zavisnost SN i SDeq kompozita. Reološka ispitivanja ukazala su na obrnuto proporcionalnu zavisnost između SN i vrednosti modula sačuvane energije, koji su iznosili 55130 Pa u slučaju potpune neutralizacije i 77480 Pa u slučaju 0% neutralizacije. Značaj - Predstavljena je jednostavna metoda za sintezu kompozitnih hidrogelova sa visokim masenim udelom nanočestica punioca. Inkorporacijom nanočestica HA postignuto je značajno poboljšanje mehaničkih svojstava hidrogelova, dok je istovremeno pokazano da je promenom SN moguće kontrolisati kinetiku bubrenja hidrogelova. .
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels
T1  - Uticaj neutralizacije na svojstva poroznih hidrogelova na bazi hidroksiapatita i poli(metakrilne kiseline) sintetisanih slobodno-radikalskom polimerizacijom
VL  - 73
IS  - 5
SP  - 613
EP  - 620
DO  - 10.5937/tehnika1805613U
ER  - 

@article{
author = "Ugrinović, Vukašin and Panić, Vesna and Veljović, Đorđe and Spasojević, Pavle and Šešlija, Sanja and Janaćković, Đorđe",
year = "2018",
abstract = "Goals. The goal of this study was a development of biocompatible composite hydrogels, structurally similar to native bone tissue, by incorporation of ~60 wt % of calcium hydroxyapatite (HA) into a matrix of hydrogels. Also, a possibility to control swelling kinetic and equilibrium swelling degree (SDeq) of hydrogels, by altering the degree of neutralization of the precursor (DN) was examined. Methods. Composite hydrogels, based on HA and poly(methacrylic acid) (PMAA), were synthesized by free-radical polymerization with different DN. Theoretical content of HA in synthesized composites was 60 wt %. Composites were synthesized by methods of dynamic mechanical analysis and scanning electron microscopy. SDeq and swelling kinetic were examined in distilled water and simulated body fluid. Results. Morphological observations revealed uniform distribution and strong bond of spherical HA particles within the polymer matrix. Swelling analyses demonstrated that SDeq is directly proportional to DN, while rheological examinations indicated inverse proportion between DN and storage modulus, but due to the HA particles inclusion, mechanical properties of composites were significantly better compared to monophasic PMAA hydrogels. Significance. Simple method of synthesis of composite hydrogels with high content of filler nanoparticles is presented. Incorporation of HA nanoparticles significantly improved mechanical properties of hydrogels, while at the same time was demonstrated a possibility to control swelling kinetic by influencing the DN., Ciljevi - Cilj ove studije bio je razvoj biokompatibilnih kompozitnih hidrogelova, koji su slične strukture kao prirodno koštano tkivo, inkorporacijom ∼60 mas % kalcijum-hidroksiapatita (HA) u matricu hidro-gela. Takođe, ispitan je uticaj neutralizacije prekursora polimerne mreže na kinetiku bubrenja i ravnotežni stepen bubrenja (SDeq).Metode - Kompozitni hidrogelovi, sastavljeni od HA i poli(metakrilne kiseline) (PMAA), sintetisani su slobodno-radikalskom polimerizacijom, pri različitim stepenima neutralizacije prekursora (SN). Svi sintetisani kompoziti sadrže visok maseni udeo HA (~60 mas %). Kompoziti su okarakterisani metodama skenirajuće elektronske mikroskopije (SEM) i dinamičko-mehaničke analize (DMA). SDeq i kinetika bubrenja ispitivani su u destilovanoj vodi i simuliranoj telesnoj tečnosti (SBF). Rezultati - Morfološka ispitivanja pokazala su uniformnu raspodelu i dobru povezanost sferičnih čestica apatita sa polimernom matricom. Analiza procesa bubrenja pokazala je proporcionalnu zavisnost SN i SDeq kompozita. Reološka ispitivanja ukazala su na obrnuto proporcionalnu zavisnost između SN i vrednosti modula sačuvane energije, koji su iznosili 55130 Pa u slučaju potpune neutralizacije i 77480 Pa u slučaju 0% neutralizacije. Značaj - Predstavljena je jednostavna metoda za sintezu kompozitnih hidrogelova sa visokim masenim udelom nanočestica punioca. Inkorporacijom nanočestica HA postignuto je značajno poboljšanje mehaničkih svojstava hidrogelova, dok je istovremeno pokazano da je promenom SN moguće kontrolisati kinetiku bubrenja hidrogelova. .",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels, Uticaj neutralizacije na svojstva poroznih hidrogelova na bazi hidroksiapatita i poli(metakrilne kiseline) sintetisanih slobodno-radikalskom polimerizacijom",
volume = "73",
number = "5",
pages = "613-620",
doi = "10.5937/tehnika1805613U"
}

Ugrinović, V., Panić, V., Veljović, Đ., Spasojević, P., Šešlija, S.,& Janaćković, Đ.. (2018). Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 73(5), 613-620.
https://doi.org/10.5937/tehnika1805613U

Ugrinović V, Panić V, Veljović Đ, Spasojević P, Šešlija S, Janaćković Đ. Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels. in Tehnika. 2018;73(5):613-620.
doi:10.5937/tehnika1805613U .

Ugrinović, Vukašin, Panić, Vesna, Veljović, Đorđe, Spasojević, Pavle, Šešlija, Sanja, Janaćković, Đorđe, "Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels" in Tehnika, 73, no. 5 (2018):613-620,
https://doi.org/10.5937/tehnika1805613U . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Dobrzynska-Mizera, Monika
AU  - Immirzi, Barbara
AU  - Stevanović, Jasmina
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2304
AB  - Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application
VL  - 113
SP  - 924
EP  - 932
DO  - 10.1016/j.ijbiomac.2018.03.006
ER  - 

@article{
author = "Šešlija, Sanja and Spasojević, Pavle and Panić, Vesna and Dobrzynska-Mizera, Monika and Immirzi, Barbara and Stevanović, Jasmina and Popović, Ivanka G.",
year = "2018",
abstract = "Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application",
volume = "113",
pages = "924-932",
doi = "10.1016/j.ijbiomac.2018.03.006"
}

Šešlija, S., Spasojević, P., Panić, V., Dobrzynska-Mizera, M., Immirzi, B., Stevanović, J.,& Popović, I. G.. (2018). Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules
Elsevier., 113, 924-932.
https://doi.org/10.1016/j.ijbiomac.2018.03.006

Šešlija S, Spasojević P, Panić V, Dobrzynska-Mizera M, Immirzi B, Stevanović J, Popović IG. Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules. 2018;113:924-932.
doi:10.1016/j.ijbiomac.2018.03.006 .

Šešlija, Sanja, Spasojević, Pavle, Panić, Vesna, Dobrzynska-Mizera, Monika, Immirzi, Barbara, Stevanović, Jasmina, Popović, Ivanka G., "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application" in International Journal of Biological Macromolecules, 113 (2018):924-932,
https://doi.org/10.1016/j.ijbiomac.2018.03.006 . .

TY  - JOUR
AU  - Fidanovski, Bojana Z.
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Spasojevic, Jelena P.
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2458
AB  - The sustainable tomorrow for future generations lies with the present industrial development toward the proper utilization of various bio-based products. For a transition to a higher level of sustainability, it is necessary to form a new platform for advanced technology products. This paper reports the development of new fully bio-based unsaturated polyesters resins (UPRs). A series of prepolymers were synthesized by varying saturated diacids (oxalic, succinic and adipic acid), itaconic acid and 1,2-propandiol. Dimethyl itaconate was used as a reactive diluent (RD) in amounts of 30, 35 and 40 wt%. Rheological measurements showed that the obtained resins possessed viscosities (234-2226 mPa s) amenable to a variety of liquid molding techniques. The impact of composition variables-prepolymer structure and amount of RD-on the chemical, mechanical and thermal properties of the thermosets was examined by DMA, TA and tensile measurements and was discussed in detail. The tensile properties (37-52 MPa), glass transition temperature (60-97 A degrees C) and coefficient of thermal expansion (71-168 10(-6) A degrees C-1) of the cured resins were in the desired range for UPRs. This investigation showed that UPRs based on itaconic acid can be tailored during synthesis of the prepolymer to meet the needs of different property profiles.
PB  - Springer
T2  - Journal of Materials Science
T1  - Synthesis and characterization of fully bio-based unsaturated polyester resins
VL  - 53
IS  - 6
SP  - 4635
EP  - 4644
DO  - 10.1007/s10853-017-1822-y
ER  - 

@article{
author = "Fidanovski, Bojana Z. and Spasojević, Pavle and Panić, Vesna and Šešlija, Sanja and Spasojevic, Jelena P. and Popović, Ivanka G.",
year = "2018",
abstract = "The sustainable tomorrow for future generations lies with the present industrial development toward the proper utilization of various bio-based products. For a transition to a higher level of sustainability, it is necessary to form a new platform for advanced technology products. This paper reports the development of new fully bio-based unsaturated polyesters resins (UPRs). A series of prepolymers were synthesized by varying saturated diacids (oxalic, succinic and adipic acid), itaconic acid and 1,2-propandiol. Dimethyl itaconate was used as a reactive diluent (RD) in amounts of 30, 35 and 40 wt%. Rheological measurements showed that the obtained resins possessed viscosities (234-2226 mPa s) amenable to a variety of liquid molding techniques. The impact of composition variables-prepolymer structure and amount of RD-on the chemical, mechanical and thermal properties of the thermosets was examined by DMA, TA and tensile measurements and was discussed in detail. The tensile properties (37-52 MPa), glass transition temperature (60-97 A degrees C) and coefficient of thermal expansion (71-168 10(-6) A degrees C-1) of the cured resins were in the desired range for UPRs. This investigation showed that UPRs based on itaconic acid can be tailored during synthesis of the prepolymer to meet the needs of different property profiles.",
publisher = "Springer",
journal = "Journal of Materials Science",
title = "Synthesis and characterization of fully bio-based unsaturated polyester resins",
volume = "53",
number = "6",
pages = "4635-4644",
doi = "10.1007/s10853-017-1822-y"
}

Fidanovski, B. Z., Spasojević, P., Panić, V., Šešlija, S., Spasojevic, J. P.,& Popović, I. G.. (2018). Synthesis and characterization of fully bio-based unsaturated polyester resins. in Journal of Materials Science
Springer., 53(6), 4635-4644.
https://doi.org/10.1007/s10853-017-1822-y

Fidanovski BZ, Spasojević P, Panić V, Šešlija S, Spasojevic JP, Popović IG. Synthesis and characterization of fully bio-based unsaturated polyester resins. in Journal of Materials Science. 2018;53(6):4635-4644.
doi:10.1007/s10853-017-1822-y .

Fidanovski, Bojana Z., Spasojević, Pavle, Panić, Vesna, Šešlija, Sanja, Spasojevic, Jelena P., Popović, Ivanka G., "Synthesis and characterization of fully bio-based unsaturated polyester resins" in Journal of Materials Science, 53, no. 6 (2018):4635-4644,
https://doi.org/10.1007/s10853-017-1822-y . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Dobrzynska-Mizera, Monika
AU  - Immirzi, Barbara
AU  - Stevanović, Jasmina
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4290
AB  - Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application
VL  - 113
SP  - 924
EP  - 932
DO  - 10.1016/j.ijbiomac.2018.03.006
ER  - 

@article{
author = "Šešlija, Sanja and Spasojević, Pavle and Panić, Vesna and Dobrzynska-Mizera, Monika and Immirzi, Barbara and Stevanović, Jasmina and Popović, Ivanka G.",
year = "2018",
abstract = "Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application",
volume = "113",
pages = "924-932",
doi = "10.1016/j.ijbiomac.2018.03.006"
}

Šešlija, S., Spasojević, P., Panić, V., Dobrzynska-Mizera, M., Immirzi, B., Stevanović, J.,& Popović, I. G.. (2018). Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules
Elsevier., 113, 924-932.
https://doi.org/10.1016/j.ijbiomac.2018.03.006

Šešlija S, Spasojević P, Panić V, Dobrzynska-Mizera M, Immirzi B, Stevanović J, Popović IG. Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules. 2018;113:924-932.
doi:10.1016/j.ijbiomac.2018.03.006 .

Šešlija, Sanja, Spasojević, Pavle, Panić, Vesna, Dobrzynska-Mizera, Monika, Immirzi, Barbara, Stevanović, Jasmina, Popović, Ivanka G., "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application" in International Journal of Biological Macromolecules, 113 (2018):924-932,
https://doi.org/10.1016/j.ijbiomac.2018.03.006 . .

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna
AU  - Spasojević, Pavle
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2331
AB  - Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.
PB  - Hoboken : Wiley
T2  - Polymer Composites
T1  - Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles
VL  - 39
IS  - 5
SP  - 1488
EP  - 1499
DO  - 10.1002/pc.24089
ER  - 

@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna and Spasojević, Pavle and Marinović-Cincović, Milena and Jeremić, Katarina B. and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2018",
abstract = "Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.",
publisher = "Hoboken : Wiley",
journal = "Polymer Composites",
title = "Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles",
volume = "39",
number = "5",
pages = "1488-1499",
doi = "10.1002/pc.24089"
}

Radoman, T. S., Džunuzović, J., Spasojević, P., Marinović-Cincović, M., Jeremić, K. B., Popović, I. G.,& Džunuzović, E. S.. (2018). Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles. in Polymer Composites
Hoboken : Wiley., 39(5), 1488-1499.
https://doi.org/10.1002/pc.24089

Radoman TS, Džunuzović J, Spasojević P, Marinović-Cincović M, Jeremić KB, Popović IG, Džunuzović ES. Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles. in Polymer Composites. 2018;39(5):1488-1499.
doi:10.1002/pc.24089 .

Radoman, Tijana S., Džunuzović, Jasna, Spasojević, Pavle, Marinović-Cincović, Milena, Jeremić, Katarina B., Popović, Ivanka G., Džunuzović, Enis S., "Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles" in Polymer Composites, 39, no. 5 (2018):1488-1499,
https://doi.org/10.1002/pc.24089 . .

TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Nikolić, Marija S.
AU  - Jeremić, Sanja
AU  - Đokić, Lidija
AU  - Nikodinović-Runić, Jasmina
AU  - Ćosović, Vladan
AU  - Đonlagić, Jasna
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2311
AB  - Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( LT  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.
PB  - Springer
T2  - Journal of Polymers and the Environment
T1  - Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers
VL  - 26
IS  - 6
SP  - 2346
EP  - 2359
DO  - 10.1007/s10924-017-1130-2
ER  - 

@article{
author = "Ponjavić, Marijana and Nikolić, Marija S. and Jeremić, Sanja and Đokić, Lidija and Nikodinović-Runić, Jasmina and Ćosović, Vladan and Đonlagić, Jasna",
year = "2018",
abstract = "Hydrolytic, enzymatic degradation and composting under controlled conditions of series of triblock PCL/PEO copolymers, PCEC, with central short PEO block (M (n) 400 g/mol) are presented and compared with homopolymer (PCL). The PCEC copolymers, synthesized via ring-opening polymerization of epsilon-caprolactone, were characterized by H-1 NMR, quantitative C-13 NMR, GPC, DSC and WAXS. The introduction of the PEO central segment ( LT  2 wt%) in PCL chains significantly affected thermal degradation and crystallization behavior, while the hydrophobicity was slightly reduced as confirmed by water absorption and moisture uptake experiments. Hydrolytic degradation studies in phosphate buffer after 8 weeks indicated a small weight loss, while FTIR analysis detected changes in crystallinity indexes and GPC measurements revealed bulk degradation. Enzymatic degradation tested by cell-free extracts containing Pseudomonas aeruginosa PAO1 confirmed high enzyme activity throughout the surface causing morphological changes detected by optical microscopy and AFM analysis. The changes in roughness of polymer films revealed surface erosion mechanism of enzymatic degradation. Copolymer with the highest content of PEO segment and the lowest molecular weight showed better degradation ability compared to PCL and other copolymers. Furthermore, composting of polymer films in a model compost system at 37 A degrees C resulted in significant degradation of the all synthesized block copolymers.",
publisher = "Springer",
journal = "Journal of Polymers and the Environment",
title = "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers",
volume = "26",
number = "6",
pages = "2346-2359",
doi = "10.1007/s10924-017-1130-2"
}

Ponjavić, M., Nikolić, M. S., Jeremić, S., Đokić, L., Nikodinović-Runić, J., Ćosović, V.,& Đonlagić, J.. (2018). Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment
Springer., 26(6), 2346-2359.
https://doi.org/10.1007/s10924-017-1130-2

Ponjavić M, Nikolić MS, Jeremić S, Đokić L, Nikodinović-Runić J, Ćosović V, Đonlagić J. Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers. in Journal of Polymers and the Environment. 2018;26(6):2346-2359.
doi:10.1007/s10924-017-1130-2 .

Ponjavić, Marijana, Nikolić, Marija S., Jeremić, Sanja, Đokić, Lidija, Nikodinović-Runić, Jasmina, Ćosović, Vladan, Đonlagić, Jasna, "Influence of Short Central PEO Segment on Hydrolytic and Enzymatic Degradation of Triblock PCL Copolymers" in Journal of Polymers and the Environment, 26, no. 6 (2018):2346-2359,
https://doi.org/10.1007/s10924-017-1130-2 . .