TY  - JOUR
AU  - Elhmali, Houda Taher
AU  - Stajčić, Ivana
AU  - Stajčić, Aleksandar
AU  - Pešić, Ivan
AU  - Jovanović, Marija
AU  - Petrović, Miloš
AU  - Radojević, Vesna
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7427
AB  - While dental poly methyl methacrylate(PMMA) possesses distinctive qualities such as ease of fabrication, cost-effectiveness, and favorable physical and mechanical properties, these attributes alone are inadequate to impart the necessary impact strength and hardness. Consequently, pure PMMA is less suitable for dental applications. This research focused on the incorporation of Strontium titanate (SrTiO3-STO) and hybrid filler STO/Manganese oxide (MnO2) to improve impact resistance and hardness. The potential of STO in reinforcing PMMA is poorly investigated, while hybrid filler STO/MnO2 has not been presented yet. Differential scanning calorimetry is conducted in order to investigate the agglomeration influence on the PMMA glass transition temperature (Tg), as well as the leaching of residual monomer and volatile additives that could pose a threat to human health. It has been determined that agglomeration with 1 wt% loading had no influence on Tg, while the first scan revealed differences in evaporation of small molecules, in favor of composite PMMA-STO/MnO2, which showed the trapping potential of volatiles. Investigations of mechanical properties have revealed the significant influence of hybrid STO/MnO2 filler on microhardness and total absorbed impact energy, which were increased by 89.9% and 145.4%, respectively. Results presented in this study revealed the reinforcing potential of hybrid nanoparticles that could find application in other polymers as well.
PB  - MDPI
T2  - Polymers
T1  - Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior
VL  - 16
IS  - 2
SP  - 278
DO  - 10.3390/polym16020278
ER  - 

@article{
author = "Elhmali, Houda Taher and Stajčić, Ivana and Stajčić, Aleksandar and Pešić, Ivan and Jovanović, Marija and Petrović, Miloš and Radojević, Vesna",
year = "2024",
abstract = "While dental poly methyl methacrylate(PMMA) possesses distinctive qualities such as ease of fabrication, cost-effectiveness, and favorable physical and mechanical properties, these attributes alone are inadequate to impart the necessary impact strength and hardness. Consequently, pure PMMA is less suitable for dental applications. This research focused on the incorporation of Strontium titanate (SrTiO3-STO) and hybrid filler STO/Manganese oxide (MnO2) to improve impact resistance and hardness. The potential of STO in reinforcing PMMA is poorly investigated, while hybrid filler STO/MnO2 has not been presented yet. Differential scanning calorimetry is conducted in order to investigate the agglomeration influence on the PMMA glass transition temperature (Tg), as well as the leaching of residual monomer and volatile additives that could pose a threat to human health. It has been determined that agglomeration with 1 wt% loading had no influence on Tg, while the first scan revealed differences in evaporation of small molecules, in favor of composite PMMA-STO/MnO2, which showed the trapping potential of volatiles. Investigations of mechanical properties have revealed the significant influence of hybrid STO/MnO2 filler on microhardness and total absorbed impact energy, which were increased by 89.9% and 145.4%, respectively. Results presented in this study revealed the reinforcing potential of hybrid nanoparticles that could find application in other polymers as well.",
publisher = "MDPI",
journal = "Polymers",
title = "Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior",
volume = "16",
number = "2",
pages = "278",
doi = "10.3390/polym16020278"
}

Elhmali, H. T., Stajčić, I., Stajčić, A., Pešić, I., Jovanović, M., Petrović, M.,& Radojević, V.. (2024). Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior. in Polymers
MDPI., 16(2), 278.
https://doi.org/10.3390/polym16020278

Elhmali HT, Stajčić I, Stajčić A, Pešić I, Jovanović M, Petrović M, Radojević V. Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior. in Polymers. 2024;16(2):278.
doi:10.3390/polym16020278 .

Elhmali, Houda Taher, Stajčić, Ivana, Stajčić, Aleksandar, Pešić, Ivan, Jovanović, Marija, Petrović, Miloš, Radojević, Vesna, "Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior" in Polymers, 16, no. 2 (2024):278,
https://doi.org/10.3390/polym16020278 . .

Vorkapić, M., Nešić, D., Tanasković, D., Mladenović, I., Vićentić, T., Stajčić, A.,& Vasiljević-Radović, D.. (2023). Tehnologija izrade spoja polimernih materijala i tekstila u procesu štampe različitih 3D struktura. 
University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
https://hdl.handle.net/21.15107/rcub_cer_6932

Vorkapić M, Nešić D, Tanasković D, Mladenović I, Vićentić T, Stajčić A, Vasiljević-Radović D. Tehnologija izrade spoja polimernih materijala i tekstila u procesu štampe različitih 3D struktura. 2023;.
https://hdl.handle.net/21.15107/rcub_cer_6932 .

Vorkapić, Miloš, Nešić, Dušan, Tanasković, Dragan, Mladenović, Ivana, Vićentić, Teodora, Stajčić, Aleksandar, Vasiljević-Radović, Dana, "Tehnologija izrade spoja polimernih materijala i tekstila u procesu štampe različitih 3D struktura" (2023),
https://hdl.handle.net/21.15107/rcub_cer_6932 .

TY  - JOUR
AU  - Stajčić, Ivana
AU  - Veljković, Filip
AU  - Petrović, Miloš
AU  - Veličković, Suzana
AU  - Radojević, Vesna
AU  - Vlahović, Branislav
AU  - Stajčić, Aleksandar
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7112
AB  - High performance polymers with bio-based modifiers are promising materials in terms of
applications and environmental impact. In this work, raw acacia honey was used as a bio-modifier
for epoxy resin, as a rich source of functional groups. The addition of honey resulted in the formation
of highly stable structures that were observed in scanning electron microscopy images as separate
phases at the fracture surface, which were involved in the toughening of the resin. Structural changes
were investigated, revealing the formation of a new aldehyde carbonyl group. Thermal analysis
confirmed the formation of products that were stable up to 600 ◦C, with a glass transition temperature
of 228 ◦C. An energy-controlled impact test was performed to compare the absorbed impact energy of
bio-modified epoxy containing different amounts of honey with unmodified epoxy resin. The results
showed that bio-modified epoxy resin with 3 wt% of acacia honey could withstand several impacts
with full recovery, while unmodified epoxy resin broke at first impact. The absorbed energy at first
impact was 2.5 times higher for bio-modified epoxy resin than it was for unmodified epoxy resin.
In this manner, by using simple preparation and a raw material that is abundant in nature, a novel
epoxy with high thermal and impact resistance was obtained, opening a path for further research in
this field.
PB  - MDPI
T2  - Polymers
T1  - Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey
VL  - 15
IS  - 10
SP  - 2261
DO  - 10.3390/polym15102261
ER  - 

@article{
author = "Stajčić, Ivana and Veljković, Filip and Petrović, Miloš and Veličković, Suzana and Radojević, Vesna and Vlahović, Branislav and Stajčić, Aleksandar",
year = "2023",
abstract = "High performance polymers with bio-based modifiers are promising materials in terms of
applications and environmental impact. In this work, raw acacia honey was used as a bio-modifier
for epoxy resin, as a rich source of functional groups. The addition of honey resulted in the formation
of highly stable structures that were observed in scanning electron microscopy images as separate
phases at the fracture surface, which were involved in the toughening of the resin. Structural changes
were investigated, revealing the formation of a new aldehyde carbonyl group. Thermal analysis
confirmed the formation of products that were stable up to 600 ◦C, with a glass transition temperature
of 228 ◦C. An energy-controlled impact test was performed to compare the absorbed impact energy of
bio-modified epoxy containing different amounts of honey with unmodified epoxy resin. The results
showed that bio-modified epoxy resin with 3 wt% of acacia honey could withstand several impacts
with full recovery, while unmodified epoxy resin broke at first impact. The absorbed energy at first
impact was 2.5 times higher for bio-modified epoxy resin than it was for unmodified epoxy resin.
In this manner, by using simple preparation and a raw material that is abundant in nature, a novel
epoxy with high thermal and impact resistance was obtained, opening a path for further research in
this field.",
publisher = "MDPI",
journal = "Polymers",
title = "Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey",
volume = "15",
number = "10",
pages = "2261",
doi = "10.3390/polym15102261"
}

Stajčić, I., Veljković, F., Petrović, M., Veličković, S., Radojević, V., Vlahović, B.,& Stajčić, A.. (2023). Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey. in Polymers
MDPI., 15(10), 2261.
https://doi.org/10.3390/polym15102261

Stajčić I, Veljković F, Petrović M, Veličković S, Radojević V, Vlahović B, Stajčić A. Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey. in Polymers. 2023;15(10):2261.
doi:10.3390/polym15102261 .

Stajčić, Ivana, Veljković, Filip, Petrović, Miloš, Veličković, Suzana, Radojević, Vesna, Vlahović, Branislav, Stajčić, Aleksandar, "Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey" in Polymers, 15, no. 10 (2023):2261,
https://doi.org/10.3390/polym15102261 . .

Stajčić, A., Stajčić, I., Vorkapić, M.,& Mladenović, I.. (2023). BaTiO3 visoke dielektrične konstante dobijen površinskom modifikacijom. 
University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
https://hdl.handle.net/21.15107/rcub_cer_7139

Stajčić A, Stajčić I, Vorkapić M, Mladenović I. BaTiO3 visoke dielektrične konstante dobijen površinskom modifikacijom. 2023;.
https://hdl.handle.net/21.15107/rcub_cer_7139 .

Stajčić, Aleksandar, Stajčić, Ivana, Vorkapić, Miloš, Mladenović, Ivana, "BaTiO3 visoke dielektrične konstante dobijen površinskom modifikacijom" (2023),
https://hdl.handle.net/21.15107/rcub_cer_7139 .

TY  - JOUR
AU  - Stajčić, Ivana
AU  - Stajčić, Aleksandar
AU  - Serpa, Cristina
AU  - Vasiljević-Radović, Dana
AU  - Randjelović, Branislav
AU  - Radojević, Vesna
AU  - Fecht, Hans
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5571
AB  - Polymers and polymer matrix composites are commonly used materials with applications extending from packaging materials to delicate electronic devices. Epoxy resins and fiber-reinforced epoxy-based composites have been used as adhesives and construction parts. Fractal analysis has been recognized in materials science as a valuable tool for the microstructural characterization of composites by connecting fractal characteristics with composites’ functional properties. In this study, fractal reconstructions of different microstructural shapes in an epoxy-based composite were performed on field emission scanning electron microscopy (FESEM) images. These images were of glass fiber reinforced epoxy as well as a hybrid composite containing both glass and electrospun polystyrene fibers in an epoxy matrix. Fractal reconstruction enables the identification of self-similarity in the fractal structure, which represents a novelty in analyzing the fractal properties of materials. Fractal Real Finder software, based on the mathematical affine fractal regression model, was employed to reconstruct different microstructure shapes and calculate fractal dimensions to develop a method of predicting the optimal structure–property relations in composite materials in the future.
PB  - MDPI
T2  - Fractal and Fractional
T1  - Microstructure of Epoxy-Based Composites: Fractal Nature Analysis
VL  - 6
IS  - 12
SP  - 741
DO  - 10.3390/fractalfract6120741
ER  - 

@article{
author = "Stajčić, Ivana and Stajčić, Aleksandar and Serpa, Cristina and Vasiljević-Radović, Dana and Randjelović, Branislav and Radojević, Vesna and Fecht, Hans",
year = "2022",
abstract = "Polymers and polymer matrix composites are commonly used materials with applications extending from packaging materials to delicate electronic devices. Epoxy resins and fiber-reinforced epoxy-based composites have been used as adhesives and construction parts. Fractal analysis has been recognized in materials science as a valuable tool for the microstructural characterization of composites by connecting fractal characteristics with composites’ functional properties. In this study, fractal reconstructions of different microstructural shapes in an epoxy-based composite were performed on field emission scanning electron microscopy (FESEM) images. These images were of glass fiber reinforced epoxy as well as a hybrid composite containing both glass and electrospun polystyrene fibers in an epoxy matrix. Fractal reconstruction enables the identification of self-similarity in the fractal structure, which represents a novelty in analyzing the fractal properties of materials. Fractal Real Finder software, based on the mathematical affine fractal regression model, was employed to reconstruct different microstructure shapes and calculate fractal dimensions to develop a method of predicting the optimal structure–property relations in composite materials in the future.",
publisher = "MDPI",
journal = "Fractal and Fractional",
title = "Microstructure of Epoxy-Based Composites: Fractal Nature Analysis",
volume = "6",
number = "12",
pages = "741",
doi = "10.3390/fractalfract6120741"
}

Stajčić, I., Stajčić, A., Serpa, C., Vasiljević-Radović, D., Randjelović, B., Radojević, V.,& Fecht, H.. (2022). Microstructure of Epoxy-Based Composites: Fractal Nature Analysis. in Fractal and Fractional
MDPI., 6(12), 741.
https://doi.org/10.3390/fractalfract6120741

Stajčić I, Stajčić A, Serpa C, Vasiljević-Radović D, Randjelović B, Radojević V, Fecht H. Microstructure of Epoxy-Based Composites: Fractal Nature Analysis. in Fractal and Fractional. 2022;6(12):741.
doi:10.3390/fractalfract6120741 .

Stajčić, Ivana, Stajčić, Aleksandar, Serpa, Cristina, Vasiljević-Radović, Dana, Randjelović, Branislav, Radojević, Vesna, Fecht, Hans, "Microstructure of Epoxy-Based Composites: Fractal Nature Analysis" in Fractal and Fractional, 6, no. 12 (2022):741,
https://doi.org/10.3390/fractalfract6120741 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Stajčić, Ivana
AU  - Mitic, Vojislav
AU  - Lu, Chun-An
AU  - Vlahovic, Branislav
AU  - Vasiljević-Radović, Dana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5631
AB  - BaTiO3 (BTO) is considered the most commonly used ceramic material in multilayer
ceramic capacitors due to its desirable dielectric properties. Considering that the miniaturization of electronic devices represents an expanding field of research, modification
of BTO has been performed to increase dielectric constant and DC bias characteristic/sensitivity. This research presents the effect of N2 and air atmospheres on morphological and dielectric properties of BTO nanoparticles modified with organometallic salt
at sintering temperatures of 1200◦C, 1250◦C, 1300◦C, and 1350◦C. Measured dielectric
constants were up to 35,000, with achieved very high values in both atmospheres. Field
emission scanning electron microscopy (FESEM) was used for morphological characterization, revealing a porous structure in all the samples. The software image analysis
of FESEM images showed a connection between particle and pore size distribution, as
well as porosity. Based on the data from the image analysis, the prediction of dielectric
properties in relation to morphology indicated that yttrium-based organometallic salt
reduced oxygen vacancy generation in N2 atmosphere. DC bias sensitivity measurements
showed that samples with higher dielectric constant had more pronounced sensitivity to
voltage change, but most of the samples were stable up to 100 V, making our modified
BTO a promising candidate for capacitors.
PB  - World Scientific Publishing
T2  - Modern Physics Letters B
T1  - Sintering parameters influence on dielectric properties of modified nano-BaTiO3 ceramics
VL  - 36
IS  - 19
SP  - 2250060
DO  - 10.1142/S0217984922500609
ER  - 

@article{
author = "Stajčić, Aleksandar and Stajčić, Ivana and Mitic, Vojislav and Lu, Chun-An and Vlahovic, Branislav and Vasiljević-Radović, Dana",
year = "2022",
abstract = "BaTiO3 (BTO) is considered the most commonly used ceramic material in multilayer
ceramic capacitors due to its desirable dielectric properties. Considering that the miniaturization of electronic devices represents an expanding field of research, modification
of BTO has been performed to increase dielectric constant and DC bias characteristic/sensitivity. This research presents the effect of N2 and air atmospheres on morphological and dielectric properties of BTO nanoparticles modified with organometallic salt
at sintering temperatures of 1200◦C, 1250◦C, 1300◦C, and 1350◦C. Measured dielectric
constants were up to 35,000, with achieved very high values in both atmospheres. Field
emission scanning electron microscopy (FESEM) was used for morphological characterization, revealing a porous structure in all the samples. The software image analysis
of FESEM images showed a connection between particle and pore size distribution, as
well as porosity. Based on the data from the image analysis, the prediction of dielectric
properties in relation to morphology indicated that yttrium-based organometallic salt
reduced oxygen vacancy generation in N2 atmosphere. DC bias sensitivity measurements
showed that samples with higher dielectric constant had more pronounced sensitivity to
voltage change, but most of the samples were stable up to 100 V, making our modified
BTO a promising candidate for capacitors.",
publisher = "World Scientific Publishing",
journal = "Modern Physics Letters B",
title = "Sintering parameters influence on dielectric properties of modified nano-BaTiO3 ceramics",
volume = "36",
number = "19",
pages = "2250060",
doi = "10.1142/S0217984922500609"
}

Stajčić, A., Stajčić, I., Mitic, V., Lu, C., Vlahovic, B.,& Vasiljević-Radović, D.. (2022). Sintering parameters influence on dielectric properties of modified nano-BaTiO3 ceramics. in Modern Physics Letters B
World Scientific Publishing., 36(19), 2250060.
https://doi.org/10.1142/S0217984922500609

Stajčić A, Stajčić I, Mitic V, Lu C, Vlahovic B, Vasiljević-Radović D. Sintering parameters influence on dielectric properties of modified nano-BaTiO3 ceramics. in Modern Physics Letters B. 2022;36(19):2250060.
doi:10.1142/S0217984922500609 .

Stajčić, Aleksandar, Stajčić, Ivana, Mitic, Vojislav, Lu, Chun-An, Vlahovic, Branislav, Vasiljević-Radović, Dana, "Sintering parameters influence on dielectric properties of modified nano-BaTiO3 ceramics" in Modern Physics Letters B, 36, no. 19 (2022):2250060,
https://doi.org/10.1142/S0217984922500609 . .

TY  - CONF
AU  - Stajčić, Aleksandar
AU  - Mitić, Vojislav
AU  - Serpa, Cristina
AU  - Randjelović, Branislav
AU  - Radović, Ivana
PY  - 2021
UR  - https://www.etran.rs/2021/en/proceedings/
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4925
AB  - Polymer matrix composites (PMCs) are very attractive materials due to a possibility to achieve versatile properties by combining with ceramic or metal reinforcement in different shapes and sizes. As a result, PMCs have found application in nearly every field, from household appliances to aerospace industry. Modern microelectronic devices contain conductive polymers with fillers that enhance their electrical properties. In addition, PMCs are being used as insulators and adhesives, contributing to the long life of electronic devices. Epoxy resins are the most commonly used insulators and adhesives. In order to improve their fracture toughness, glass fibers can be used as an efficient reinforcement. However, with the purpose of designing a composite with good mechanical properties and durability, deep knowledge of microstructure is required. In addition, microstructural analysis can be used to connect shape and size of pores or reinforcement with various physical properties. Fractal nature analysis is a valuable mathematical tool that can be employed for different shapes and forms rendering. In this manner, successful design and prediction of composite’s properties could be obtained. In this research, field emission scanning electron microscopy (FESEM) images were used for fractal analysis of glass fibers, with the aim of reconstructing the shape.
PB  - Belgrade: ETRAN – Society for electronics, telecommunication, computing, automatics and nuclear angineering
C3  - Proceedings - 8th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2021 and 65th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering ETRAN 2020
T1  - Reconstruction of fiber reinforcement in epoxy-based composite
UR  - https://hdl.handle.net/21.15107/rcub_cer_4925
ER  - 

@conference{
author = "Stajčić, Aleksandar and Mitić, Vojislav and Serpa, Cristina and Randjelović, Branislav and Radović, Ivana",
year = "2021",
abstract = "Polymer matrix composites (PMCs) are very attractive materials due to a possibility to achieve versatile properties by combining with ceramic or metal reinforcement in different shapes and sizes. As a result, PMCs have found application in nearly every field, from household appliances to aerospace industry. Modern microelectronic devices contain conductive polymers with fillers that enhance their electrical properties. In addition, PMCs are being used as insulators and adhesives, contributing to the long life of electronic devices. Epoxy resins are the most commonly used insulators and adhesives. In order to improve their fracture toughness, glass fibers can be used as an efficient reinforcement. However, with the purpose of designing a composite with good mechanical properties and durability, deep knowledge of microstructure is required. In addition, microstructural analysis can be used to connect shape and size of pores or reinforcement with various physical properties. Fractal nature analysis is a valuable mathematical tool that can be employed for different shapes and forms rendering. In this manner, successful design and prediction of composite’s properties could be obtained. In this research, field emission scanning electron microscopy (FESEM) images were used for fractal analysis of glass fibers, with the aim of reconstructing the shape.",
publisher = "Belgrade: ETRAN – Society for electronics, telecommunication, computing, automatics and nuclear angineering",
journal = "Proceedings - 8th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2021 and 65th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering ETRAN 2020",
title = "Reconstruction of fiber reinforcement in epoxy-based composite",
url = "https://hdl.handle.net/21.15107/rcub_cer_4925"
}

Stajčić, A., Mitić, V., Serpa, C., Randjelović, B.,& Radović, I.. (2021). Reconstruction of fiber reinforcement in epoxy-based composite. in Proceedings - 8th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2021 and 65th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering ETRAN 2020
Belgrade: ETRAN – Society for electronics, telecommunication, computing, automatics and nuclear angineering..
https://hdl.handle.net/21.15107/rcub_cer_4925

Stajčić A, Mitić V, Serpa C, Randjelović B, Radović I. Reconstruction of fiber reinforcement in epoxy-based composite. in Proceedings - 8th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2021 and 65th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering ETRAN 2020. 2021;.
https://hdl.handle.net/21.15107/rcub_cer_4925 .

Stajčić, Aleksandar, Mitić, Vojislav, Serpa, Cristina, Randjelović, Branislav, Radović, Ivana, "Reconstruction of fiber reinforcement in epoxy-based composite" in Proceedings - 8th International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2021 and 65th National Conference on Electrоnics, Telecommunication, Computing, Automatic Control and Nuclear Engineering ETRAN 2020 (2021),
https://hdl.handle.net/21.15107/rcub_cer_4925 .

TY  - CONF
AU  - Radović, Ivana
AU  - Mitić, Vojislav V.
AU  - Stajčić, Aleksandar
AU  - Serpa, Cristina
AU  - Ribar, Srđan
AU  - Ranđelović, Branislav
AU  - Vlahović, Branislav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4899
AB  - Polymers offer the possibility of different reinforcement incorporation due to a broad range of
chemical structures.Along with this feature, their light weight and processing ease made them
a class of materials that have been applied in construction parts, drug delivery agents or
electronic devices. Epoxy-based composites have used as insulators in microelectronic
devices due to its chemical resistance, good adhesion properties and endurance. As epoxies
have low fracture resistance, they are often reinforced with different kinds of fibers.With
thorough knowledge of the structure, physical properties can be predicted and included in the
processing of future composites, especially that electronic materials minituarization brought
micro- and nanoscale level properties at spotlight. Fractal nature analysis is a mathematical
method that has proved to be efficient in grain interface properties applied on perovskite
ceramic materials.In our study, fiber shape reconstruction and determination of Hausdorff
dimension have been achieved with the application of fractal regression model employed in
software Fractal Real Finder opening a new path for the prediction of reinforcement shape
and size, all with the aim of processing composite materials with desired properties.
PB  - Belgrade : Serbian Chemical Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing
T1  - Fractal reconstruction of fiber-reinforced polymer composites
SP  - 49
EP  - 49
UR  - https://hdl.handle.net/21.15107/rcub_dais_12361
ER  - 

@conference{
author = "Radović, Ivana and Mitić, Vojislav V. and Stajčić, Aleksandar and Serpa, Cristina and Ribar, Srđan and Ranđelović, Branislav and Vlahović, Branislav",
year = "2021",
abstract = "Polymers offer the possibility of different reinforcement incorporation due to a broad range of
chemical structures.Along with this feature, their light weight and processing ease made them
a class of materials that have been applied in construction parts, drug delivery agents or
electronic devices. Epoxy-based composites have used as insulators in microelectronic
devices due to its chemical resistance, good adhesion properties and endurance. As epoxies
have low fracture resistance, they are often reinforced with different kinds of fibers.With
thorough knowledge of the structure, physical properties can be predicted and included in the
processing of future composites, especially that electronic materials minituarization brought
micro- and nanoscale level properties at spotlight. Fractal nature analysis is a mathematical
method that has proved to be efficient in grain interface properties applied on perovskite
ceramic materials.In our study, fiber shape reconstruction and determination of Hausdorff
dimension have been achieved with the application of fractal regression model employed in
software Fractal Real Finder opening a new path for the prediction of reinforcement shape
and size, all with the aim of processing composite materials with desired properties.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing",
title = "Fractal reconstruction of fiber-reinforced polymer composites",
pages = "49-49",
url = "https://hdl.handle.net/21.15107/rcub_dais_12361"
}

Radović, I., Mitić, V. V., Stajčić, A., Serpa, C., Ribar, S., Ranđelović, B.,& Vlahović, B.. (2021). Fractal reconstruction of fiber-reinforced polymer composites. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing
Belgrade : Serbian Chemical Society., 49-49.
https://hdl.handle.net/21.15107/rcub_dais_12361

Radović I, Mitić VV, Stajčić A, Serpa C, Ribar S, Ranđelović B, Vlahović B. Fractal reconstruction of fiber-reinforced polymer composites. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing. 2021;:49-49.
https://hdl.handle.net/21.15107/rcub_dais_12361 .

Radović, Ivana, Mitić, Vojislav V., Stajčić, Aleksandar, Serpa, Cristina, Ribar, Srđan, Ranđelović, Branislav, Vlahović, Branislav, "Fractal reconstruction of fiber-reinforced polymer composites" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing (2021):49-49,
https://hdl.handle.net/21.15107/rcub_dais_12361 .

TY  - CONF
AU  - Vorkapić, Miloš
AU  - Stajčić, Aleksandar
AU  - Mladenović, Ivana
AU  - Ivanov, Toni
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5667
AB  - Iako 3D štampa verovatno neće preuzeti mnoge konvencionalne metode proizvodnje, 3D štampač može brzo da isporuči složeni dizajn sa velikom tačnošću. Međutim, aditivna proizvodnja takođe pokazuje određene slabosti. Ako karakteristike materijala nisu definisane, mogu se pojaviti problemi u realizaciji 3D modela. U našem radu je razmotreno osam uzoraka sa različitim vrednostima parametara: visina sloja, orijentacija ispune i gustina ispune. U softveru Ultimaker Cura postavlјeni su svi parametri uzorka, dok vizualizaciju dizajna uzorka vrši putanja mlaznica. Mikroskopski pregled strukture ispune pokazao je da postoje određene nepravilnosti u cilјu ispitivanja realizacije i orijentacije slojeva. U našoj analizi upotrebljena je polinalektična kiselina (PLA). Spolјni uticaji su takođe važni poput: mehaničko oštećenje, temperatura na vrhu mlaznice i brzine hlađenja materijala u okruženju. Sve to utiče na kvalitet. Mikroskopskom analizom pokušali su da se utvrde korelacije, problemi unutar strukture materijala, ali i da se daju preporuke za pobolјšanje realizacije modela.
PB  - Beograd : JUSK - Jedinstveno Udruženje Srbije za Kvalitet / Belgrade : UASQ - United Association of Serbia for Quality
C3  - Zbornik radova JUSK ICQ - XVII Međunarodna konvencija o kvalitetu 2021, 09-11/06/2021, Beograd, Srbija
T1  - Primer realizacije uzorka pomoću 3D štampe i analiza problema u kvalitetu
SP  - 102
EP  - 107
UR  - https://hdl.handle.net/21.15107/rcub_cer_5667
ER  - 

@conference{
author = "Vorkapić, Miloš and Stajčić, Aleksandar and Mladenović, Ivana and Ivanov, Toni",
year = "2021",
abstract = "Iako 3D štampa verovatno neće preuzeti mnoge konvencionalne metode proizvodnje, 3D štampač može brzo da isporuči složeni dizajn sa velikom tačnošću. Međutim, aditivna proizvodnja takođe pokazuje određene slabosti. Ako karakteristike materijala nisu definisane, mogu se pojaviti problemi u realizaciji 3D modela. U našem radu je razmotreno osam uzoraka sa različitim vrednostima parametara: visina sloja, orijentacija ispune i gustina ispune. U softveru Ultimaker Cura postavlјeni su svi parametri uzorka, dok vizualizaciju dizajna uzorka vrši putanja mlaznica. Mikroskopski pregled strukture ispune pokazao je da postoje određene nepravilnosti u cilјu ispitivanja realizacije i orijentacije slojeva. U našoj analizi upotrebljena je polinalektična kiselina (PLA). Spolјni uticaji su takođe važni poput: mehaničko oštećenje, temperatura na vrhu mlaznice i brzine hlađenja materijala u okruženju. Sve to utiče na kvalitet. Mikroskopskom analizom pokušali su da se utvrde korelacije, problemi unutar strukture materijala, ali i da se daju preporuke za pobolјšanje realizacije modela.",
publisher = "Beograd : JUSK - Jedinstveno Udruženje Srbije za Kvalitet / Belgrade : UASQ - United Association of Serbia for Quality",
journal = "Zbornik radova JUSK ICQ - XVII Međunarodna konvencija o kvalitetu 2021, 09-11/06/2021, Beograd, Srbija",
title = "Primer realizacije uzorka pomoću 3D štampe i analiza problema u kvalitetu",
pages = "102-107",
url = "https://hdl.handle.net/21.15107/rcub_cer_5667"
}

Vorkapić, M., Stajčić, A., Mladenović, I.,& Ivanov, T.. (2021). Primer realizacije uzorka pomoću 3D štampe i analiza problema u kvalitetu. in Zbornik radova JUSK ICQ - XVII Međunarodna konvencija o kvalitetu 2021, 09-11/06/2021, Beograd, Srbija
Beograd : JUSK - Jedinstveno Udruženje Srbije za Kvalitet / Belgrade : UASQ - United Association of Serbia for Quality., 102-107.
https://hdl.handle.net/21.15107/rcub_cer_5667

Vorkapić M, Stajčić A, Mladenović I, Ivanov T. Primer realizacije uzorka pomoću 3D štampe i analiza problema u kvalitetu. in Zbornik radova JUSK ICQ - XVII Međunarodna konvencija o kvalitetu 2021, 09-11/06/2021, Beograd, Srbija. 2021;:102-107.
https://hdl.handle.net/21.15107/rcub_cer_5667 .

Vorkapić, Miloš, Stajčić, Aleksandar, Mladenović, Ivana, Ivanov, Toni, "Primer realizacije uzorka pomoću 3D štampe i analiza problema u kvalitetu" in Zbornik radova JUSK ICQ - XVII Međunarodna konvencija o kvalitetu 2021, 09-11/06/2021, Beograd, Srbija (2021):102-107,
https://hdl.handle.net/21.15107/rcub_cer_5667 .

TY  - CONF
AU  - Mitić, Vojislav V.
AU  - Serpa, Kristina
AU  - Stajčić, Aleksandar
AU  - Khamoushi, Kouros
AU  - Paunović, Vesna
AU  - Aleksić, Sanja
AU  - Vlahović, Branislav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4898
AB  - Neodymium zinc titanate (NZT) is a very attractive perovskite due to its magnetic and
dielectric properties. Considering the microstructure influence NZT stability and
performance, it is of great importance to establish an approach for the analysis and prediction
of grain boundary phenomena. The fractal nature analysis has already proved to be valuable
for the reconstruction and prediction of ceramics intergranular electrical properties. However,
no researches were performed on the fractal analysis applied on magnetic materials. This
method could give an insight in magnetic properties change from the bulk to the grain
interface level. In this study, fractal analysis was applied for the Curie-Weiss law correction,
introducing fractal correction into magnetic materials for the first time. NZT powders used in
this research for fractal analysis were obtained after sintering at different temperatures in the
range from 1450°C to 1675°C.Connection between the microstructure fractal nature and the
resulting magnetic permeability has been established, enabling the application on different
magnetic materials in the future. This creates a foundation for new researches that will lead to
further miniaturization of satellite and mobile devices.
PB  - Belgrade : Serbian Chemical Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Magnetic materials, Curie-Weiss law and fractal correction
SP  - 46
EP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_dais_11907
ER  - 

@conference{
author = "Mitić, Vojislav V. and Serpa, Kristina and Stajčić, Aleksandar and Khamoushi, Kouros and Paunović, Vesna and Aleksić, Sanja and Vlahović, Branislav",
year = "2021",
abstract = "Neodymium zinc titanate (NZT) is a very attractive perovskite due to its magnetic and
dielectric properties. Considering the microstructure influence NZT stability and
performance, it is of great importance to establish an approach for the analysis and prediction
of grain boundary phenomena. The fractal nature analysis has already proved to be valuable
for the reconstruction and prediction of ceramics intergranular electrical properties. However,
no researches were performed on the fractal analysis applied on magnetic materials. This
method could give an insight in magnetic properties change from the bulk to the grain
interface level. In this study, fractal analysis was applied for the Curie-Weiss law correction,
introducing fractal correction into magnetic materials for the first time. NZT powders used in
this research for fractal analysis were obtained after sintering at different temperatures in the
range from 1450°C to 1675°C.Connection between the microstructure fractal nature and the
resulting magnetic permeability has been established, enabling the application on different
magnetic materials in the future. This creates a foundation for new researches that will lead to
further miniaturization of satellite and mobile devices.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Magnetic materials, Curie-Weiss law and fractal correction",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_dais_11907"
}

Mitić, V. V., Serpa, K., Stajčić, A., Khamoushi, K., Paunović, V., Aleksić, S.,& Vlahović, B.. (2021). Magnetic materials, Curie-Weiss law and fractal correction. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Chemical Society., 46-46.
https://hdl.handle.net/21.15107/rcub_dais_11907

Mitić VV, Serpa K, Stajčić A, Khamoushi K, Paunović V, Aleksić S, Vlahović B. Magnetic materials, Curie-Weiss law and fractal correction. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:46-46.
https://hdl.handle.net/21.15107/rcub_dais_11907 .

Mitić, Vojislav V., Serpa, Kristina, Stajčić, Aleksandar, Khamoushi, Kouros, Paunović, Vesna, Aleksić, Sanja, Vlahović, Branislav, "Magnetic materials, Curie-Weiss law and fractal correction" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):46-46,
https://hdl.handle.net/21.15107/rcub_dais_11907 .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Ranđelović, Branislav
AU  - Ilić, Ivana
AU  - Ribar, Srđan
AU  - Chun, An-Lu
AU  - Stajčić, Aleksandar
AU  - Vlahović, Branislav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4809
AB  - After pioneering attempts for the introduction of graph theory in the field of ceramics and microstructures, where 1D and 2D graphs were used, in this paper we applied 3D graphs for the breakdown voltage calculation in BaTiO3sample with some predefined constraints. We have described the relations between grains in the sample and established a mathematical approach for the calculation of breakdown voltage using experimental results. As a result, we introduced mapping between the property of sample and grain structure, then between the grain structure and mathematical graph, using various crystal structures. The main idea was to apply 3D graph theory for the distribution of electronic parameters between the neighboring grains. With this study, we successfully confirmed the possibilities for applications of graphs as a tool for the determination of properties even at the intergranular level.
PB  - World Scientific Publishing Co
T2  - International Journal of Modern Physics B
T1  - The 3D graph approach for breakdown voltage calculation in BaTiO3ceramics
VL  - 35
IS  - 7
SP  - 2150103
DO  - 10.1142/S0217979221501034
ER  - 

@article{
author = "Mitić, Vojislav V. and Ranđelović, Branislav and Ilić, Ivana and Ribar, Srđan and Chun, An-Lu and Stajčić, Aleksandar and Vlahović, Branislav",
year = "2021",
abstract = "After pioneering attempts for the introduction of graph theory in the field of ceramics and microstructures, where 1D and 2D graphs were used, in this paper we applied 3D graphs for the breakdown voltage calculation in BaTiO3sample with some predefined constraints. We have described the relations between grains in the sample and established a mathematical approach for the calculation of breakdown voltage using experimental results. As a result, we introduced mapping between the property of sample and grain structure, then between the grain structure and mathematical graph, using various crystal structures. The main idea was to apply 3D graph theory for the distribution of electronic parameters between the neighboring grains. With this study, we successfully confirmed the possibilities for applications of graphs as a tool for the determination of properties even at the intergranular level.",
publisher = "World Scientific Publishing Co",
journal = "International Journal of Modern Physics B",
title = "The 3D graph approach for breakdown voltage calculation in BaTiO3ceramics",
volume = "35",
number = "7",
pages = "2150103",
doi = "10.1142/S0217979221501034"
}

Mitić, V. V., Ranđelović, B., Ilić, I., Ribar, S., Chun, A., Stajčić, A.,& Vlahović, B.. (2021). The 3D graph approach for breakdown voltage calculation in BaTiO3ceramics. in International Journal of Modern Physics B
World Scientific Publishing Co., 35(7), 2150103.
https://doi.org/10.1142/S0217979221501034

Mitić VV, Ranđelović B, Ilić I, Ribar S, Chun A, Stajčić A, Vlahović B. The 3D graph approach for breakdown voltage calculation in BaTiO3ceramics. in International Journal of Modern Physics B. 2021;35(7):2150103.
doi:10.1142/S0217979221501034 .

Mitić, Vojislav V., Ranđelović, Branislav, Ilić, Ivana, Ribar, Srđan, Chun, An-Lu, Stajčić, Aleksandar, Vlahović, Branislav, "The 3D graph approach for breakdown voltage calculation in BaTiO3ceramics" in International Journal of Modern Physics B, 35, no. 7 (2021):2150103,
https://doi.org/10.1142/S0217979221501034 . .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Lazović, Goran
AU  - Ranđelović, Branislav
AU  - Paunović, Vesna
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Vlahović, Branislav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4837
AB  - The focus of this study is on the control of layers between grains by applying graph theory. We performed modification of BaTiO3 nanoparticles with Y2O3. The results of capacitance change on submicron level are the part of the measured values on the bulk samples. The original idea is to develop the new approach to use graph theory for networking of electronic parameters between the neighboring grains in order to compare the values measured on the sample, and to present them through the edges in graph between corresponding vertices. Capacitance change with DC bias was measured on bulk samples, and the modified nanoparticles showed stability up to 90 V. After using graph theory with the different number of neighboring grains and on different voltages, it has been shown that capacitance change can be successfully calculated on the layers between grains. Original calculations presented as 1D cases were performed, confirming graph application as a tool with which measured bulk results can be downsized to an appropriate intergranular level, opening the new perspectives in the area of miniaturization and micropackaging.
PB  - Taylor & Francis Group
T2  - Ferroelectrics
T1  - Graph theory applied to microelectronics intergranular relations
VL  - 570
IS  - 1
SP  - 145
EP  - 152
DO  - 10.1080/00150193.2020.1839265
ER  - 

@article{
author = "Mitić, Vojislav V. and Lazović, Goran and Ranđelović, Branislav and Paunović, Vesna and Radović, Ivana and Stajčić, Aleksandar and Vlahović, Branislav",
year = "2021",
abstract = "The focus of this study is on the control of layers between grains by applying graph theory. We performed modification of BaTiO3 nanoparticles with Y2O3. The results of capacitance change on submicron level are the part of the measured values on the bulk samples. The original idea is to develop the new approach to use graph theory for networking of electronic parameters between the neighboring grains in order to compare the values measured on the sample, and to present them through the edges in graph between corresponding vertices. Capacitance change with DC bias was measured on bulk samples, and the modified nanoparticles showed stability up to 90 V. After using graph theory with the different number of neighboring grains and on different voltages, it has been shown that capacitance change can be successfully calculated on the layers between grains. Original calculations presented as 1D cases were performed, confirming graph application as a tool with which measured bulk results can be downsized to an appropriate intergranular level, opening the new perspectives in the area of miniaturization and micropackaging.",
publisher = "Taylor & Francis Group",
journal = "Ferroelectrics",
title = "Graph theory applied to microelectronics intergranular relations",
volume = "570",
number = "1",
pages = "145-152",
doi = "10.1080/00150193.2020.1839265"
}

Mitić, V. V., Lazović, G., Ranđelović, B., Paunović, V., Radović, I., Stajčić, A.,& Vlahović, B.. (2021). Graph theory applied to microelectronics intergranular relations. in Ferroelectrics
Taylor & Francis Group., 570(1), 145-152.
https://doi.org/10.1080/00150193.2020.1839265

Mitić VV, Lazović G, Ranđelović B, Paunović V, Radović I, Stajčić A, Vlahović B. Graph theory applied to microelectronics intergranular relations. in Ferroelectrics. 2021;570(1):145-152.
doi:10.1080/00150193.2020.1839265 .

Mitić, Vojislav V., Lazović, Goran, Ranđelović, Branislav, Paunović, Vesna, Radović, Ivana, Stajčić, Aleksandar, Vlahović, Branislav, "Graph theory applied to microelectronics intergranular relations" in Ferroelectrics, 570, no. 1 (2021):145-152,
https://doi.org/10.1080/00150193.2020.1839265 . .

TY  - CONF
AU  - Radović, Ivan M.
AU  - Stajčić, Aleksandar
AU  - Mitić, Vojislav V.
AU  - Serpa, C.
AU  - Paunović, V.
AU  - Ranđelović, Branislav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4843
AB  - In the past century, the use of polymers and composites with a polymer matrix has expanded to such a level that today it is impossible to imagine life without these materials. Epoxy resin and epoxy-based composites are widely used as construction materials, due to their excellent adhesion, thermal and chemical stability. Fractal nature analysis can provide insight in morphological changes at fiber-matrix interface level, which could give direction for the processing of composites. This mathematical technique can be performed on field emission scanning electron microscopy (FESEM) images, by identifying fiber phase and pores shapes and boundaries, as well as fiber-matrix bonding at the interface. In this study, fiberglass mat was used for the reinforcement of epoxy. FESEM image of enlarged fiber after the composite fracture was used for the reconstruction of data. With the use of affine fractal regression model, software Fractal Real Finder was employed for the reconstruction of fiber shape and the determination of Hausdorff dimension.
PB  - Institute of Electrical and Electronics Engineers Inc.
C3  - 32nd IEEE International Conference on Microelectronics, MIEL 2021
T1  - Fractal Reconstruction of Fiber-reinforced Epoxy Microstructure
SP  - 203
EP  - 206
DO  - 10.1109/MIEL52794.2021.9569054
ER  - 

@conference{
author = "Radović, Ivan M. and Stajčić, Aleksandar and Mitić, Vojislav V. and Serpa, C. and Paunović, V. and Ranđelović, Branislav",
year = "2021",
abstract = "In the past century, the use of polymers and composites with a polymer matrix has expanded to such a level that today it is impossible to imagine life without these materials. Epoxy resin and epoxy-based composites are widely used as construction materials, due to their excellent adhesion, thermal and chemical stability. Fractal nature analysis can provide insight in morphological changes at fiber-matrix interface level, which could give direction for the processing of composites. This mathematical technique can be performed on field emission scanning electron microscopy (FESEM) images, by identifying fiber phase and pores shapes and boundaries, as well as fiber-matrix bonding at the interface. In this study, fiberglass mat was used for the reinforcement of epoxy. FESEM image of enlarged fiber after the composite fracture was used for the reconstruction of data. With the use of affine fractal regression model, software Fractal Real Finder was employed for the reconstruction of fiber shape and the determination of Hausdorff dimension.",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
journal = "32nd IEEE International Conference on Microelectronics, MIEL 2021",
title = "Fractal Reconstruction of Fiber-reinforced Epoxy Microstructure",
pages = "203-206",
doi = "10.1109/MIEL52794.2021.9569054"
}

Radović, I. M., Stajčić, A., Mitić, V. V., Serpa, C., Paunović, V.,& Ranđelović, B.. (2021). Fractal Reconstruction of Fiber-reinforced Epoxy Microstructure. in 32nd IEEE International Conference on Microelectronics, MIEL 2021
Institute of Electrical and Electronics Engineers Inc.., 203-206.
https://doi.org/10.1109/MIEL52794.2021.9569054

Radović IM, Stajčić A, Mitić VV, Serpa C, Paunović V, Ranđelović B. Fractal Reconstruction of Fiber-reinforced Epoxy Microstructure. in 32nd IEEE International Conference on Microelectronics, MIEL 2021. 2021;:203-206.
doi:10.1109/MIEL52794.2021.9569054 .

Radović, Ivan M., Stajčić, Aleksandar, Mitić, Vojislav V., Serpa, C., Paunović, V., Ranđelović, Branislav, "Fractal Reconstruction of Fiber-reinforced Epoxy Microstructure" in 32nd IEEE International Conference on Microelectronics, MIEL 2021 (2021):203-206,
https://doi.org/10.1109/MIEL52794.2021.9569054 . .

TY  - JOUR
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Radisavljević, Andjela
AU  - Veljković, Filip
AU  - Čebela, Maria
AU  - Mitić, Vojislav V.
AU  - Radojević, Vesna
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3676
AB  - Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/ healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - Solvent effects on structural changes in self-healing epoxy composites
VL  - 256
SP  - 123761
DO  - 10.1016/j.matchemphys.2020.123761
ER  - 

@article{
author = "Radović, Ivana and Stajčić, Aleksandar and Radisavljević, Andjela and Veljković, Filip and Čebela, Maria and Mitić, Vojislav V. and Radojević, Vesna",
year = "2020",
abstract = "Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/ healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "Solvent effects on structural changes in self-healing epoxy composites",
volume = "256",
pages = "123761",
doi = "10.1016/j.matchemphys.2020.123761"
}

Radović, I., Stajčić, A., Radisavljević, A., Veljković, F., Čebela, M., Mitić, V. V.,& Radojević, V.. (2020). Solvent effects on structural changes in self-healing epoxy composites. in Materials Chemistry and Physics
Elsevier., 256, 123761.
https://doi.org/10.1016/j.matchemphys.2020.123761

Radović I, Stajčić A, Radisavljević A, Veljković F, Čebela M, Mitić VV, Radojević V. Solvent effects on structural changes in self-healing epoxy composites. in Materials Chemistry and Physics. 2020;256:123761.
doi:10.1016/j.matchemphys.2020.123761 .

Radović, Ivana, Stajčić, Aleksandar, Radisavljević, Andjela, Veljković, Filip, Čebela, Maria, Mitić, Vojislav V., Radojević, Vesna, "Solvent effects on structural changes in self-healing epoxy composites" in Materials Chemistry and Physics, 256 (2020):123761,
https://doi.org/10.1016/j.matchemphys.2020.123761 . .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Lazović, Goran
AU  - Lu, Chun-An
AU  - Paunović, Vesna
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Vlahović, Branislav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3584
AB  - The BaTiO3 ceramics applications based on electronic properties have very high gradient
scientific and industrial-technological interests. Our scientific research has been based on nano BaTiO3
modified with Yttrium based organometallic salt (MOD-Y). The samples have been consolidated
at a sintering temperature of 1350  C. Within the study, the new frontiers for di erent electronic
properties between the layers of BaTiO3 grains have been introduced. The research target was
grain boundary investigations and the influence on dielectric properties. After scanning electron
microscopy and dielectric measurements, it has been established that modified BaTiO3 samples with
larger grains showed a better compact state that led to a higher dielectric constant value. DC bias
stability was also investigated and showed a connection between the grain size and capacitance
stability. Analyses of functions that could approximate experimental curves were successfully
employed. Practical application of fractal corrections was performed, based on surface ( s) and
pore size ( p) corrections, which resulted in obtainment of the relation between the capacitance and
Curie temperature. Successful introduction of fractal corrections for capacitance-Curie temperature
dependence for a set of experimental data is an important step towards further miniaturization of
intergranular capacitors.
PB  - MDPI
T2  - Applied Sciences
T1  - The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers
VL  - 10
SP  - 3485
DO  - 10.3390/app10103485
ER  - 

@article{
author = "Mitić, Vojislav V. and Lazović, Goran and Lu, Chun-An and Paunović, Vesna and Radović, Ivana and Stajčić, Aleksandar and Vlahović, Branislav",
year = "2020",
abstract = "The BaTiO3 ceramics applications based on electronic properties have very high gradient
scientific and industrial-technological interests. Our scientific research has been based on nano BaTiO3
modified with Yttrium based organometallic salt (MOD-Y). The samples have been consolidated
at a sintering temperature of 1350  C. Within the study, the new frontiers for di erent electronic
properties between the layers of BaTiO3 grains have been introduced. The research target was
grain boundary investigations and the influence on dielectric properties. After scanning electron
microscopy and dielectric measurements, it has been established that modified BaTiO3 samples with
larger grains showed a better compact state that led to a higher dielectric constant value. DC bias
stability was also investigated and showed a connection between the grain size and capacitance
stability. Analyses of functions that could approximate experimental curves were successfully
employed. Practical application of fractal corrections was performed, based on surface ( s) and
pore size ( p) corrections, which resulted in obtainment of the relation between the capacitance and
Curie temperature. Successful introduction of fractal corrections for capacitance-Curie temperature
dependence for a set of experimental data is an important step towards further miniaturization of
intergranular capacitors.",
publisher = "MDPI",
journal = "Applied Sciences",
title = "The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers",
volume = "10",
pages = "3485",
doi = "10.3390/app10103485"
}

Mitić, V. V., Lazović, G., Lu, C., Paunović, V., Radović, I., Stajčić, A.,& Vlahović, B.. (2020). The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers. in Applied Sciences
MDPI., 10, 3485.
https://doi.org/10.3390/app10103485

Mitić VV, Lazović G, Lu C, Paunović V, Radović I, Stajčić A, Vlahović B. The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers. in Applied Sciences. 2020;10:3485.
doi:10.3390/app10103485 .

Mitić, Vojislav V., Lazović, Goran, Lu, Chun-An, Paunović, Vesna, Radović, Ivana, Stajčić, Aleksandar, Vlahović, Branislav, "The Nano-Scale Modified BaTiO3 Morphology Influence on Electronic Properties and Ceramics Fractal Nature Frontiers" in Applied Sciences, 10 (2020):3485,
https://doi.org/10.3390/app10103485 . .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Lazović, Goran
AU  - Ribar, Srđan
AU  - Lu, Chun-An
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Fecht, Hans
AU  - Vlahović, Branislav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4004
AB  - This paper is based on fundamental research to develop the interface structure around the grains and to control the layers between two grains, as a prospective media for high-level electronic parameters integrations. We performed the experiments based on nanoBaTiO3 powders with Y additives. All results on dielectric parameters on submicron level are the part of global values the same measured characteristics at the bulk samples. The original idea is to develop
the new computing ways to network electronic parameters in thin layers between the grains on the way to get and to compare the values on the samples. Artificial neural networks are computing tools that map input-output data and could be applied on ceramic electronic parameters. These are developed in the manner signals are processed in biological neural networks. The signals are processed by using elements which represent artificial neurons, which have a
simple function to process input signal, as well as adjustable parameter which has an influence to change output signal. The total network output presents the sum of a large number neurons outputs. This important research idea is to connect analysis results and neural networks. There is a great interest to connect all of these microcapacitances by neural network with the goal to compare the results in the standard bulk samples measurements frame and microelectronics
parameters. The final result of the study was functional relation definition between consolidation parameters, voltage (U), and relative capacitance change, from the level of the bulk sample down to the grains boundaries.
PB  - Taylor & Francis
T2  - Integrated Ferroelectrics
T1  - The Artificial Neural Networks Applied for Microelectronics Intergranular Relations Determination
VL  - 212
IS  - 1
SP  - 135
EP  - 146
DO  - 10.1080/10584587.2020.1819042
ER  - 

@article{
author = "Mitić, Vojislav V. and Lazović, Goran and Ribar, Srđan and Lu, Chun-An and Radović, Ivana and Stajčić, Aleksandar and Fecht, Hans and Vlahović, Branislav",
year = "2020",
abstract = "This paper is based on fundamental research to develop the interface structure around the grains and to control the layers between two grains, as a prospective media for high-level electronic parameters integrations. We performed the experiments based on nanoBaTiO3 powders with Y additives. All results on dielectric parameters on submicron level are the part of global values the same measured characteristics at the bulk samples. The original idea is to develop
the new computing ways to network electronic parameters in thin layers between the grains on the way to get and to compare the values on the samples. Artificial neural networks are computing tools that map input-output data and could be applied on ceramic electronic parameters. These are developed in the manner signals are processed in biological neural networks. The signals are processed by using elements which represent artificial neurons, which have a
simple function to process input signal, as well as adjustable parameter which has an influence to change output signal. The total network output presents the sum of a large number neurons outputs. This important research idea is to connect analysis results and neural networks. There is a great interest to connect all of these microcapacitances by neural network with the goal to compare the results in the standard bulk samples measurements frame and microelectronics
parameters. The final result of the study was functional relation definition between consolidation parameters, voltage (U), and relative capacitance change, from the level of the bulk sample down to the grains boundaries.",
publisher = "Taylor & Francis",
journal = "Integrated Ferroelectrics",
title = "The Artificial Neural Networks Applied for Microelectronics Intergranular Relations Determination",
volume = "212",
number = "1",
pages = "135-146",
doi = "10.1080/10584587.2020.1819042"
}

Mitić, V. V., Lazović, G., Ribar, S., Lu, C., Radović, I., Stajčić, A., Fecht, H.,& Vlahović, B.. (2020). The Artificial Neural Networks Applied for Microelectronics Intergranular Relations Determination. in Integrated Ferroelectrics
Taylor & Francis., 212(1), 135-146.
https://doi.org/10.1080/10584587.2020.1819042

Mitić VV, Lazović G, Ribar S, Lu C, Radović I, Stajčić A, Fecht H, Vlahović B. The Artificial Neural Networks Applied for Microelectronics Intergranular Relations Determination. in Integrated Ferroelectrics. 2020;212(1):135-146.
doi:10.1080/10584587.2020.1819042 .

Mitić, Vojislav V., Lazović, Goran, Ribar, Srđan, Lu, Chun-An, Radović, Ivana, Stajčić, Aleksandar, Fecht, Hans, Vlahović, Branislav, "The Artificial Neural Networks Applied for Microelectronics Intergranular Relations Determination" in Integrated Ferroelectrics, 212, no. 1 (2020):135-146,
https://doi.org/10.1080/10584587.2020.1819042 . .

TY  - JOUR
AU  - Radjenovic, Branislav
AU  - Mitić, Vojislav V.
AU  - Ribar, Srđan
AU  - Lu, Chun-An
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Novaković, Igor
AU  - Vlahović, Branislav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4005
AB  - This research is focused on further developing of application and use of graph theory in order to describe relations between grains and to establish control over layers. We used functionalized BaTiO3 nanoparticles coated with Yttrium-based salt. The capacitance change results on super-microstructure levels are the part of the measured values on the bulk samples. The new idea is graph theory application for determination of electronic parameters distribution at the grain boundary and to compare them with the bulk measured values. We present them with vertices in graph, corresponding with grains, connected with edges. Capacitance change with applied voltage was measured on samples sintered in air and nitrogen, up to 100 V. Using graph theory, it has been shown that capacitance change can be successfully calculated on the layers between grains. Within the idea how to get parameters values at microlevel between the grains and pores, mathematical tool can be developed. Besides previously described 1D case, some original calculations for 2D cases were performed in this study, proving successful graph theory use for the calculation of values at nanolevel, leading to a further minituarization in micropackaging.
PB  - World Scientific
T2  - Modern Physics Letters B
T1  - Ceramics, materials, microelectronics and graph theory new frontiers
SP  - 2150159
DO  - 10.1142/S0217984921501591
ER  - 

@article{
author = "Radjenovic, Branislav and Mitić, Vojislav V. and Ribar, Srđan and Lu, Chun-An and Radović, Ivana and Stajčić, Aleksandar and Novaković, Igor and Vlahović, Branislav",
year = "2020",
abstract = "This research is focused on further developing of application and use of graph theory in order to describe relations between grains and to establish control over layers. We used functionalized BaTiO3 nanoparticles coated with Yttrium-based salt. The capacitance change results on super-microstructure levels are the part of the measured values on the bulk samples. The new idea is graph theory application for determination of electronic parameters distribution at the grain boundary and to compare them with the bulk measured values. We present them with vertices in graph, corresponding with grains, connected with edges. Capacitance change with applied voltage was measured on samples sintered in air and nitrogen, up to 100 V. Using graph theory, it has been shown that capacitance change can be successfully calculated on the layers between grains. Within the idea how to get parameters values at microlevel between the grains and pores, mathematical tool can be developed. Besides previously described 1D case, some original calculations for 2D cases were performed in this study, proving successful graph theory use for the calculation of values at nanolevel, leading to a further minituarization in micropackaging.",
publisher = "World Scientific",
journal = "Modern Physics Letters B",
title = "Ceramics, materials, microelectronics and graph theory new frontiers",
pages = "2150159",
doi = "10.1142/S0217984921501591"
}

Radjenovic, B., Mitić, V. V., Ribar, S., Lu, C., Radović, I., Stajčić, A., Novaković, I.,& Vlahović, B.. (2020). Ceramics, materials, microelectronics and graph theory new frontiers. in Modern Physics Letters B
World Scientific., 2150159.
https://doi.org/10.1142/S0217984921501591

Radjenovic B, Mitić VV, Ribar S, Lu C, Radović I, Stajčić A, Novaković I, Vlahović B. Ceramics, materials, microelectronics and graph theory new frontiers. in Modern Physics Letters B. 2020;:2150159.
doi:10.1142/S0217984921501591 .

Radjenovic, Branislav, Mitić, Vojislav V., Ribar, Srđan, Lu, Chun-An, Radović, Ivana, Stajčić, Aleksandar, Novaković, Igor, Vlahović, Branislav, "Ceramics, materials, microelectronics and graph theory new frontiers" in Modern Physics Letters B (2020):2150159,
https://doi.org/10.1142/S0217984921501591 . .

TY  - JOUR
AU  - Mitić, Vojislav V.
AU  - Ribar, Srđan
AU  - Randjelović, Branislav M.
AU  - Lu, Chunan
AU  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Novaković, Igor
AU  - Vlahović, Branislav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4242
AB  - This research is based on the idea to design the interface structure around the grains and thin layers between two grains, as a possible solution for deep microelectronic parameters integrations. The experiments have been based on nano-BaTiO3 powders with Y-based additive. The advanced idea is to create the new observed directions to network microelectronic characteristics in thin films coated around and between the grains on the way to get and compare with global results on the samples. Biomimetic similarities are artificial neural networks which could be original method and tools that we use to map input-output data and could be applied on ceramics microelectronic parameters. This mapping is developed in the manner like signals that are processed in real biological neural networks. These signals are processed by using artificial neurons, which have a simple function to process input signal, as well as adjustable parameter which represents sensitivity to inputs. The integrated network output presents practically the large number of inner neurons outputs sum. This original idea is to connect analysis results and neural networks. It is of the great importance to connect microcapacitances by neural network with the goal to compare the experimental results in the bulk samples measurements and microelectronics parameters. The result of these researches is the study of functional relation definition between consolidation parameters, voltage (U), consolidation sintering temperature and relative capacitance change, from the bulk sample surface down to the coating thin films around the grains.
PB  - World Scientific
T2  - Modern Physics Letters B
T1  - Neural networks and microelectronics parameters distribution measurements depending on sintering temperature and applied voltage
VL  - 34
IS  - 35
SP  - 2150172
DO  - 10.1142/S0217984921501724
ER  - 

@article{
author = "Mitić, Vojislav V. and Ribar, Srđan and Randjelović, Branislav M. and Lu, Chunan and Radović, Ivana and Stajčić, Aleksandar and Novaković, Igor and Vlahović, Branislav",
year = "2020",
abstract = "This research is based on the idea to design the interface structure around the grains and thin layers between two grains, as a possible solution for deep microelectronic parameters integrations. The experiments have been based on nano-BaTiO3 powders with Y-based additive. The advanced idea is to create the new observed directions to network microelectronic characteristics in thin films coated around and between the grains on the way to get and compare with global results on the samples. Biomimetic similarities are artificial neural networks which could be original method and tools that we use to map input-output data and could be applied on ceramics microelectronic parameters. This mapping is developed in the manner like signals that are processed in real biological neural networks. These signals are processed by using artificial neurons, which have a simple function to process input signal, as well as adjustable parameter which represents sensitivity to inputs. The integrated network output presents practically the large number of inner neurons outputs sum. This original idea is to connect analysis results and neural networks. It is of the great importance to connect microcapacitances by neural network with the goal to compare the experimental results in the bulk samples measurements and microelectronics parameters. The result of these researches is the study of functional relation definition between consolidation parameters, voltage (U), consolidation sintering temperature and relative capacitance change, from the bulk sample surface down to the coating thin films around the grains.",
publisher = "World Scientific",
journal = "Modern Physics Letters B",
title = "Neural networks and microelectronics parameters distribution measurements depending on sintering temperature and applied voltage",
volume = "34",
number = "35",
pages = "2150172",
doi = "10.1142/S0217984921501724"
}

Mitić, V. V., Ribar, S., Randjelović, B. M., Lu, C., Radović, I., Stajčić, A., Novaković, I.,& Vlahović, B.. (2020). Neural networks and microelectronics parameters distribution measurements depending on sintering temperature and applied voltage. in Modern Physics Letters B
World Scientific., 34(35), 2150172.
https://doi.org/10.1142/S0217984921501724

Mitić VV, Ribar S, Randjelović BM, Lu C, Radović I, Stajčić A, Novaković I, Vlahović B. Neural networks and microelectronics parameters distribution measurements depending on sintering temperature and applied voltage. in Modern Physics Letters B. 2020;34(35):2150172.
doi:10.1142/S0217984921501724 .

Mitić, Vojislav V., Ribar, Srđan, Randjelović, Branislav M., Lu, Chunan, Radović, Ivana, Stajčić, Aleksandar, Novaković, Igor, Vlahović, Branislav, "Neural networks and microelectronics parameters distribution measurements depending on sintering temperature and applied voltage" in Modern Physics Letters B, 34, no. 35 (2020):2150172,
https://doi.org/10.1142/S0217984921501724 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Radović, Ivana
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3232
AB  - This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.
AB  - Ова студија представља припрему и карактеризацију нанокомпозита на бази етил целулозе. Успешна употреба једноставне технике изливања обезбедила је нанокомпозите са великим уделом магнетног нанопраха баријум ферита у полимерној матрици, обећавајући значајно побољшање механичких својстава. Истраживањем морфологије откривено је формирање агломерата који су и даље на наноскопском нивоу. Нанокомпозитни танки филмови са већим садржајем магнетног праха показали су значајно повећање прекидне чврстоће, издужења и микротврдоће у поређењу са чистом етил целулозом, што је био главни циљ овог истраживања.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites
VL  - 51
IS  - 3
SP  - 277
EP  - 283
DO  - 10.2298/SOS1903277S
ER  - 

@article{
author = "Stajčić, Aleksandar and Radović, Ivana and Ćosović, Vladan and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2019",
abstract = "This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research., Ова студија представља припрему и карактеризацију нанокомпозита на бази етил целулозе. Успешна употреба једноставне технике изливања обезбедила је нанокомпозите са великим уделом магнетног нанопраха баријум ферита у полимерној матрици, обећавајући значајно побољшање механичких својстава. Истраживањем морфологије откривено је формирање агломерата који су и даље на наноскопском нивоу. Нанокомпозитни танки филмови са већим садржајем магнетног праха показали су значајно повећање прекидне чврстоће, издужења и микротврдоће у поређењу са чистом етил целулозом, што је био главни циљ овог истраживања.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites",
volume = "51",
number = "3",
pages = "277-283",
doi = "10.2298/SOS1903277S"
}

Stajčić, A., Radović, I., Ćosović, V., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2019). The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites. in Science of Sintering
Belgrade : Association for ETRAN Society., 51(3), 277-283.
https://doi.org/10.2298/SOS1903277S

Stajčić A, Radović I, Ćosović V, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites. in Science of Sintering. 2019;51(3):277-283.
doi:10.2298/SOS1903277S .

Stajčić, Aleksandar, Radović, Ivana, Ćosović, Vladan, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites" in Science of Sintering, 51, no. 3 (2019):277-283,
https://doi.org/10.2298/SOS1903277S . .

Stajčić, A., Popović, B., Vorkapić, M., Grujić, A.,& Stajić-Trošić, J.. (2019). Difuziona komora za ispitivanje separacionih svojstava membrana. 
University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
https://hdl.handle.net/21.15107/rcub_cer_7140

Stajčić A, Popović B, Vorkapić M, Grujić A, Stajić-Trošić J. Difuziona komora za ispitivanje separacionih svojstava membrana. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_7140 .

Stajčić, Aleksandar, Popović, Bogdan, Vorkapić, Miloš, Grujić, Aleksandar, Stajić-Trošić, Jasna, "Difuziona komora za ispitivanje separacionih svojstava membrana" (2019),
https://hdl.handle.net/21.15107/rcub_cer_7140 .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Panić, Vesna
AU  - Radović, Ivana
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2359
AB  - This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.
PB  - Hopkinton : Desalination Publications
T2  - Desalination and Water Treatment
T1  - Adsorption kinetics of polyethersulfone membrane-supported hydrogels
VL  - 131
SP  - 43
EP  - 49
DO  - 10.5004/dwt.2018.22959
ER  - 

@article{
author = "Stajčić, Aleksandar and Nedeljković, Dragutin and Panić, Vesna and Radović, Ivana and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.",
publisher = "Hopkinton : Desalination Publications",
journal = "Desalination and Water Treatment",
title = "Adsorption kinetics of polyethersulfone membrane-supported hydrogels",
volume = "131",
pages = "43-49",
doi = "10.5004/dwt.2018.22959"
}

Stajčić, A., Nedeljković, D., Panić, V., Radović, I., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2018). Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment
Hopkinton : Desalination Publications., 131, 43-49.
https://doi.org/10.5004/dwt.2018.22959

Stajčić A, Nedeljković D, Panić V, Radović I, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment. 2018;131:43-49.
doi:10.5004/dwt.2018.22959 .

Stajčić, Aleksandar, Nedeljković, Dragutin, Panić, Vesna, Radović, Ivana, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "Adsorption kinetics of polyethersulfone membrane-supported hydrogels" in Desalination and Water Treatment, 131 (2018):43-49,
https://doi.org/10.5004/dwt.2018.22959 . .

TY  - THES
AU  - Stajčić, Aleksandar
PY  - 2018
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=6332
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:19003/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=50771215
UR  - http://nardus.mpn.gov.rs/123456789/10320
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2579
AB  - Fokus ove doktorske disertacije je na pripremi i karakterizaciji magnetnihnanokompozitnih membrana za separaciju gasova, kao i na pripremi i karakterizacijipolimernih membrana za uklanjanje jona teških metala iz vode. Pri procesiranjumagnetnih membrana, magnetne nanočestice barijum ferita (BaFe12O19) i stroncijumferita (SrFe12O19) inkorporirane su u etilcelulozu, sa ciljem pospešivanja difuzijekiseonika u odnosu na azot. Sinteza asimetričnih polimernih membrana na bazihidrogela ojačanog polietarsulfonom (PES) izvršena je kombinovanjem procesa fazneinverzije sa fotopolimerizacijom i umrežavanjem monomera Ispitivan je uticaj udelananočestica kod magnetnih nanokompozitnih i udela PES kod polimernih membrana namehanička i separaciona svojstva. Sa ciljem identifikacije struktura nastalihprocesiranjem membrana, izvršene su različite analize, kao što su skenirajućaelektronska mikroskopija (FESEM), mikroskopija atomskih sila (AFM), rendgentskodifrakcionaanaliza (XRD) i infracrvena spektroskopija sa Furijeovom transformacijom(FTIR) Mehanička svojstva membrana ispitivana su mikro Vikers metodom izatezanjem. Sorpciona kinetika ispitana je promenom koncentracije jona u rastvoru iopisana je korišćenjem različitih kinetičkih modela. Permeabilnost magnetnihnanokompozitnih membrana ispitana je praćenjem promene izlaznog pritiska smešeazota i kiseonika, kao i čistog azota. Membrane na bazi hidrogelova sa većim sadržajemPES pokazuju poboljšana mehanička svojstva, uz visok adsorpcioni kapacitet.Nanokompozitne magnetne membrane sa većim sadržajem magnetnih nanočesticapokazale su značajno poboljšanje mehaničkih svojstava u poređenju sa čistometilcelulozom, uz visoku permeabilnost. Navedene analize su pokazale da sunanokompozitne membrane na bazi etilceluloze odličan kandidat za separaciju gasova,dok membrane na bazi hidrogelova pokazuju visok potencijal za uklanjanje jona teškihmetala iz vode. Na osnovu dosadašnjih saznanja, navedeni materijali nisu bili predmetranijih istraživanja.
AB  - The focus of this doctoral dissertation is on the preparation and characterization ofmagnetic nanocomposite membranes for gas separation, as well as on the preparationand characterization of polymer membranes for removal of heavy metal ions fromwater. In the processing of magnetic membranes, magnetic nanoparticles of bariumferrite (BaFe12O19) and strontium ferrite (SrFe12O19) were incorporated intoethylcellulose, in order to promote oxygen diffusion against nitrogen. Synthesis ofasymmetric hydrogel-based polymer membranes reinforced with polyethersulphone(PES) was performed by combining the phase inversion with photopolymerization andthe cross-linking of monomers. The influence of the nanoparticle content in magneticnanocomposite and the PES fraction in polymer membranes on the mechanical andseparation properties was investigated. In order to identify the structures formed bymembrane processing, various analyzes were performed, such as scanning electronmicroscopy (FESEM), atomic force microscopy (AFM), X-ray diffraction XRD andinfrared spectroscopy with Fourier transformation (FTIR). Mechanical properties of themembranes were investigated using micro Vickers method and tensile test. The sorptionkinetics has been followed with the measurements of ions concentration change in thesolution, and was described using different kinetic models. The permeability ofmagnetic nanocomposite membranes was tested by monitoring the output pressurechange of the nitrogen and oxygen mixtures, as well as pure nitrogen. Hydrogel-basedmembranes with a higher PES content showed enhanced mechanical properties, withhigh adsorption capacity. Nanocomposite magnetic membranes with a higher content ofmagnetic nanoparticles have shown a significant improvement in mechanical propertiescompared to pure ethylcellulose, with high permeability. These findings have shownthat nanocomposite membranes based on ethylcellulose are an excellent candidate forgas separation, while hydrogel-based membranes exhibit high potential for removal ofheavy metal ions from water. Based on our current knowledge, these materials have notbeen the subject of previous research.
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T2  - Универзитет у Београду
T1  - Sinteza, karakterizacija i primena polimernih kompozitnih magnetnih membrana na bazi etilceluloze
UR  - https://hdl.handle.net/21.15107/rcub_nardus_10320
ER  - 

@phdthesis{
author = "Stajčić, Aleksandar",
year = "2018",
abstract = "Fokus ove doktorske disertacije je na pripremi i karakterizaciji magnetnihnanokompozitnih membrana za separaciju gasova, kao i na pripremi i karakterizacijipolimernih membrana za uklanjanje jona teških metala iz vode. Pri procesiranjumagnetnih membrana, magnetne nanočestice barijum ferita (BaFe12O19) i stroncijumferita (SrFe12O19) inkorporirane su u etilcelulozu, sa ciljem pospešivanja difuzijekiseonika u odnosu na azot. Sinteza asimetričnih polimernih membrana na bazihidrogela ojačanog polietarsulfonom (PES) izvršena je kombinovanjem procesa fazneinverzije sa fotopolimerizacijom i umrežavanjem monomera Ispitivan je uticaj udelananočestica kod magnetnih nanokompozitnih i udela PES kod polimernih membrana namehanička i separaciona svojstva. Sa ciljem identifikacije struktura nastalihprocesiranjem membrana, izvršene su različite analize, kao što su skenirajućaelektronska mikroskopija (FESEM), mikroskopija atomskih sila (AFM), rendgentskodifrakcionaanaliza (XRD) i infracrvena spektroskopija sa Furijeovom transformacijom(FTIR) Mehanička svojstva membrana ispitivana su mikro Vikers metodom izatezanjem. Sorpciona kinetika ispitana je promenom koncentracije jona u rastvoru iopisana je korišćenjem različitih kinetičkih modela. Permeabilnost magnetnihnanokompozitnih membrana ispitana je praćenjem promene izlaznog pritiska smešeazota i kiseonika, kao i čistog azota. Membrane na bazi hidrogelova sa većim sadržajemPES pokazuju poboljšana mehanička svojstva, uz visok adsorpcioni kapacitet.Nanokompozitne magnetne membrane sa većim sadržajem magnetnih nanočesticapokazale su značajno poboljšanje mehaničkih svojstava u poređenju sa čistometilcelulozom, uz visoku permeabilnost. Navedene analize su pokazale da sunanokompozitne membrane na bazi etilceluloze odličan kandidat za separaciju gasova,dok membrane na bazi hidrogelova pokazuju visok potencijal za uklanjanje jona teškihmetala iz vode. Na osnovu dosadašnjih saznanja, navedeni materijali nisu bili predmetranijih istraživanja., The focus of this doctoral dissertation is on the preparation and characterization ofmagnetic nanocomposite membranes for gas separation, as well as on the preparationand characterization of polymer membranes for removal of heavy metal ions fromwater. In the processing of magnetic membranes, magnetic nanoparticles of bariumferrite (BaFe12O19) and strontium ferrite (SrFe12O19) were incorporated intoethylcellulose, in order to promote oxygen diffusion against nitrogen. Synthesis ofasymmetric hydrogel-based polymer membranes reinforced with polyethersulphone(PES) was performed by combining the phase inversion with photopolymerization andthe cross-linking of monomers. The influence of the nanoparticle content in magneticnanocomposite and the PES fraction in polymer membranes on the mechanical andseparation properties was investigated. In order to identify the structures formed bymembrane processing, various analyzes were performed, such as scanning electronmicroscopy (FESEM), atomic force microscopy (AFM), X-ray diffraction XRD andinfrared spectroscopy with Fourier transformation (FTIR). Mechanical properties of themembranes were investigated using micro Vickers method and tensile test. The sorptionkinetics has been followed with the measurements of ions concentration change in thesolution, and was described using different kinetic models. The permeability ofmagnetic nanocomposite membranes was tested by monitoring the output pressurechange of the nitrogen and oxygen mixtures, as well as pure nitrogen. Hydrogel-basedmembranes with a higher PES content showed enhanced mechanical properties, withhigh adsorption capacity. Nanocomposite magnetic membranes with a higher content ofmagnetic nanoparticles have shown a significant improvement in mechanical propertiescompared to pure ethylcellulose, with high permeability. These findings have shownthat nanocomposite membranes based on ethylcellulose are an excellent candidate forgas separation, while hydrogel-based membranes exhibit high potential for removal ofheavy metal ions from water. Based on our current knowledge, these materials have notbeen the subject of previous research.",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
journal = "Универзитет у Београду",
title = "Sinteza, karakterizacija i primena polimernih kompozitnih magnetnih membrana na bazi etilceluloze",
url = "https://hdl.handle.net/21.15107/rcub_nardus_10320"
}

Stajčić, A.. (2018). Sinteza, karakterizacija i primena polimernih kompozitnih magnetnih membrana na bazi etilceluloze. in Универзитет у Београду
Универзитет у Београду, Технолошко-металуршки факултет..
https://hdl.handle.net/21.15107/rcub_nardus_10320

Stajčić A. Sinteza, karakterizacija i primena polimernih kompozitnih magnetnih membrana na bazi etilceluloze. in Универзитет у Београду. 2018;.
https://hdl.handle.net/21.15107/rcub_nardus_10320 .

Stajčić, Aleksandar, "Sinteza, karakterizacija i primena polimernih kompozitnih magnetnih membrana na bazi etilceluloze" in Универзитет у Београду (2018),
https://hdl.handle.net/21.15107/rcub_nardus_10320 .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
AU  - Stajić-Trošić, Jasna
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1637
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7.
AB  - Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation
T1  - Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida
VL  - 70
IS  - 2
SP  - 216
EP  - 222
DO  - 10.5937/tehnika1502216N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stijepović, Mirko Z. and Stajić-Trošić, Jasna",
year = "2015",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7., Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation, Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida",
volume = "70",
number = "2",
pages = "216-222",
doi = "10.5937/tehnika1502216N"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stijepović, M. Z.,& Stajić-Trošić, J.. (2015). The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika
Savez inženjera i tehničara Srbije., 70(2), 216-222.
https://doi.org/10.5937/tehnika1502216N

Nedeljković D, Stajčić A, Grujić A, Stijepović MZ, Stajić-Trošić J. The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika. 2015;70(2):216-222.
doi:10.5937/tehnika1502216N .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stijepović, Mirko Z., Stajić-Trošić, Jasna, "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation" in Tehnika, 70, no. 2 (2015):216-222,
https://doi.org/10.5937/tehnika1502216N . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stevanović, Marija P.
AU  - Stijepović, Mirko Z.
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stevanović, Jasmina
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1733
AB  - The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solution diffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NSI and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive.
AB  - Cilj ovog rada je bio da se konstruiše neporozna kompozitna membrana bazirana na polimernom matriksu koja može da bude upotrebljena za tretman otpadnih gasova. Za ovu svrhu, neophodno je da membrana ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji ne najčešće sreću u produktima sagorevanja (azot, kiseonik, vodonik, metan). Ove membrane pripadaju grupi neporoznih membrana i mehanizam separacije gasova je baziran na rastvorljivosti i difuziji. U ovom radu, testirana je mogućnost primene poli(etilenoksida)-kopoli(ftalamida). Da bi se povećala permeabilnost ugljen-dioksida, dodavana su tri različita zeolitna praha, a da bi se poboljšala kompatibilnost neorganskih čestica i polimernih lanaca, dodat je n-tetradeciltrimetilamonijum-bromid (NTAB). Ispitivani zeoliti pripadaju grupi sa dvodimenzionalnim porama (IHW, NSI i TER). Najbolji rezultati u separaciji ugljen-dioksida i vodonika su postignuti kod membrana baziranim na polimeru PEBAX 1657 i zeolitima uz dodatak aditiva. Sa druge strane, bolja selektivnost je postignuta kod membrana baziranih na Polyactive polimeru.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation
T1  - Mogućnost primene zeolitnih prahova za konstrukciju membrana za izdvajanje ugljen-dioksida
VL  - 21
IS  - 2
SP  - 277
EP  - 284
DO  - 10.2298/CICEQ130924025N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stevanović, Marija P. and Stijepović, Mirko Z. and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Stevanović, Jasmina",
year = "2015",
abstract = "The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solution diffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NSI and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive., Cilj ovog rada je bio da se konstruiše neporozna kompozitna membrana bazirana na polimernom matriksu koja može da bude upotrebljena za tretman otpadnih gasova. Za ovu svrhu, neophodno je da membrana ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji ne najčešće sreću u produktima sagorevanja (azot, kiseonik, vodonik, metan). Ove membrane pripadaju grupi neporoznih membrana i mehanizam separacije gasova je baziran na rastvorljivosti i difuziji. U ovom radu, testirana je mogućnost primene poli(etilenoksida)-kopoli(ftalamida). Da bi se povećala permeabilnost ugljen-dioksida, dodavana su tri različita zeolitna praha, a da bi se poboljšala kompatibilnost neorganskih čestica i polimernih lanaca, dodat je n-tetradeciltrimetilamonijum-bromid (NTAB). Ispitivani zeoliti pripadaju grupi sa dvodimenzionalnim porama (IHW, NSI i TER). Najbolji rezultati u separaciji ugljen-dioksida i vodonika su postignuti kod membrana baziranim na polimeru PEBAX 1657 i zeolitima uz dodatak aditiva. Sa druge strane, bolja selektivnost je postignuta kod membrana baziranih na Polyactive polimeru.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation, Mogućnost primene zeolitnih prahova za konstrukciju membrana za izdvajanje ugljen-dioksida",
volume = "21",
number = "2",
pages = "277-284",
doi = "10.2298/CICEQ130924025N"
}

Nedeljković, D., Stevanović, M. P., Stijepović, M. Z., Stajčić, A., Grujić, A., Stajić-Trošić, J.,& Stevanović, J.. (2015). The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(2), 277-284.
https://doi.org/10.2298/CICEQ130924025N

Nedeljković D, Stevanović MP, Stijepović MZ, Stajčić A, Grujić A, Stajić-Trošić J, Stevanović J. The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(2):277-284.
doi:10.2298/CICEQ130924025N .

Nedeljković, Dragutin, Stevanović, Marija P., Stijepović, Mirko Z., Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Stevanović, Jasmina, "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 2 (2015):277-284,
https://doi.org/10.2298/CICEQ130924025N . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nastasović, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Markovic, Jelena
AU  - Onjia, Antonije E.
AU  - Radovanović, Filip
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1753
AB  - Polyethersulfone membranes with integrated negatively-charged hydrogel of crosslinked poly (acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a liquid phase inversion process with photopolymerization and crosslinking of functional monomers included in the casting solution. A designed experiment was conducted to select the optimal composition for preparing membranes with a sufficient degree of swelling and ion exchange capacity. Scanning electron microscopy images revealed an ultrafine hybrid structure with an interconnected network of submicron particles embedded within the microporous polyethersulfone support. An intramembrane diffusion model was used to describe kinetics of heavy metal sorption by these hydrogels and the calculated apparent diffusion coefficients were 2-3 times larger than in commercial ion-exchange resins. Equilibrium sorption of heavy metals was described using a semi-empirical Langmuir model.
PB  - Elsevier
T2  - Journal of Environmental Chemical Engineering
T1  - Novel membrane-supported hydrogel for removal of heavy metals
VL  - 3
IS  - 1
SP  - 453
EP  - 461
DO  - 10.1016/j.jece.2015.01.005
ER  - 

@article{
author = "Stajčić, Aleksandar and Nastasović, Aleksandra and Stajić-Trošić, Jasna and Markovic, Jelena and Onjia, Antonije E. and Radovanović, Filip",
year = "2015",
abstract = "Polyethersulfone membranes with integrated negatively-charged hydrogel of crosslinked poly (acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a liquid phase inversion process with photopolymerization and crosslinking of functional monomers included in the casting solution. A designed experiment was conducted to select the optimal composition for preparing membranes with a sufficient degree of swelling and ion exchange capacity. Scanning electron microscopy images revealed an ultrafine hybrid structure with an interconnected network of submicron particles embedded within the microporous polyethersulfone support. An intramembrane diffusion model was used to describe kinetics of heavy metal sorption by these hydrogels and the calculated apparent diffusion coefficients were 2-3 times larger than in commercial ion-exchange resins. Equilibrium sorption of heavy metals was described using a semi-empirical Langmuir model.",
publisher = "Elsevier",
journal = "Journal of Environmental Chemical Engineering",
title = "Novel membrane-supported hydrogel for removal of heavy metals",
volume = "3",
number = "1",
pages = "453-461",
doi = "10.1016/j.jece.2015.01.005"
}

Stajčić, A., Nastasović, A., Stajić-Trošić, J., Markovic, J., Onjia, A. E.,& Radovanović, F.. (2015). Novel membrane-supported hydrogel for removal of heavy metals. in Journal of Environmental Chemical Engineering
Elsevier., 3(1), 453-461.
https://doi.org/10.1016/j.jece.2015.01.005

Stajčić A, Nastasović A, Stajić-Trošić J, Markovic J, Onjia AE, Radovanović F. Novel membrane-supported hydrogel for removal of heavy metals. in Journal of Environmental Chemical Engineering. 2015;3(1):453-461.
doi:10.1016/j.jece.2015.01.005 .

Stajčić, Aleksandar, Nastasović, Aleksandra, Stajić-Trošić, Jasna, Markovic, Jelena, Onjia, Antonije E., Radovanović, Filip, "Novel membrane-supported hydrogel for removal of heavy metals" in Journal of Environmental Chemical Engineering, 3, no. 1 (2015):453-461,
https://doi.org/10.1016/j.jece.2015.01.005 . .