TY  - JOUR
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Marković, Maja
AU  - Pantić, Olga
AU  - Antić, Katarina M.
AU  - Spasojević, Milica
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4786
AB  - Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.
PB  - MDPI
T2  - Polymers
T1  - Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study
VL  - 13
IS  - 16
SP  - 2667
DO  - 10.3390/polym13162667
ER  - 

@article{
author = "Spasojević, Pavle and Šešlija, Sanja and Marković, Maja and Pantić, Olga and Antić, Katarina M. and Spasojević, Milica",
year = "2021",
abstract = "Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.",
publisher = "MDPI",
journal = "Polymers",
title = "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study",
volume = "13",
number = "16",
pages = "2667",
doi = "10.3390/polym13162667"
}

Spasojević, P., Šešlija, S., Marković, M., Pantić, O., Antić, K. M.,& Spasojević, M.. (2021). Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers
MDPI., 13(16), 2667.
https://doi.org/10.3390/polym13162667

Spasojević P, Šešlija S, Marković M, Pantić O, Antić KM, Spasojević M. Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers. 2021;13(16):2667.
doi:10.3390/polym13162667 .

Spasojević, Pavle, Šešlija, Sanja, Marković, Maja, Pantić, Olga, Antić, Katarina M., Spasojević, Milica, "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study" in Polymers, 13, no. 16 (2021):2667,
https://doi.org/10.3390/polym13162667 . .

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

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

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

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

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

TY  - JOUR
AU  - Antić, Katarina M.
AU  - Babić, Marija M.
AU  - Jovašević Vuković, Jovana J.
AU  - Vasiljević-Radović, Dana
AU  - Onjia, Antonije E.
AU  - Filipović, Jovanka M.
AU  - Tomić, Simonida Lj.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2898
AB  - Series of novel hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA), P(HEA/IA) copolymers, were prepared by free radical cross-linking copolymerization and investigated as potential adsorbents for Cd2+ removal from aqueous solution. The hydrogels before and after Cd2+ adsorption were characterized using FTIR, temperature sensitive. In order to evaluate adsorption behavior of samples various factors affecting the Cd2+ uptake behavior, such as: contact time, temperature, pH, ionic strength, adsorbent weight, competitive ions and initial concentration of the metal ions were investigated. Five adsorption isotherms and two kinetic models were studied. The adsorption behavior can be very well described by the pseudo-second order kinetic model and Langmuir isotherm. Multicomponent adsorption studies revealed that adsorption of cadmium depends on the type of metal ions present in the system. Desorption studies showed that hydrogel can be reused three times with only 15% loss of adsorption capacity. All results indicate that the sample with the highest IA content is the most promising adsorbent for Cd2+ removal.
PB  - Amsterdam : Elsevier Science Bv
T2  - Applied Surface Science
T1  - Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution
VL  - 338
SP  - 178
EP  - 189
DO  - 10.1016/j.apsusc.2015.02.133
ER  - 

@article{
author = "Antić, Katarina M. and Babić, Marija M. and Jovašević Vuković, Jovana J. and Vasiljević-Radović, Dana and Onjia, Antonije E. and Filipović, Jovanka M. and Tomić, Simonida Lj.",
year = "2015",
abstract = "Series of novel hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA), P(HEA/IA) copolymers, were prepared by free radical cross-linking copolymerization and investigated as potential adsorbents for Cd2+ removal from aqueous solution. The hydrogels before and after Cd2+ adsorption were characterized using FTIR, temperature sensitive. In order to evaluate adsorption behavior of samples various factors affecting the Cd2+ uptake behavior, such as: contact time, temperature, pH, ionic strength, adsorbent weight, competitive ions and initial concentration of the metal ions were investigated. Five adsorption isotherms and two kinetic models were studied. The adsorption behavior can be very well described by the pseudo-second order kinetic model and Langmuir isotherm. Multicomponent adsorption studies revealed that adsorption of cadmium depends on the type of metal ions present in the system. Desorption studies showed that hydrogel can be reused three times with only 15% loss of adsorption capacity. All results indicate that the sample with the highest IA content is the most promising adsorbent for Cd2+ removal.",
publisher = "Amsterdam : Elsevier Science Bv",
journal = "Applied Surface Science",
title = "Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution",
volume = "338",
pages = "178-189",
doi = "10.1016/j.apsusc.2015.02.133"
}

Antić, K. M., Babić, M. M., Jovašević Vuković, J. J., Vasiljević-Radović, D., Onjia, A. E., Filipović, J. M.,& Tomić, S. Lj.. (2015). Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution. in Applied Surface Science
Amsterdam : Elsevier Science Bv., 338, 178-189.
https://doi.org/10.1016/j.apsusc.2015.02.133

Antić KM, Babić MM, Jovašević Vuković JJ, Vasiljević-Radović D, Onjia AE, Filipović JM, Tomić SL. Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution. in Applied Surface Science. 2015;338:178-189.
doi:10.1016/j.apsusc.2015.02.133 .

Antić, Katarina M., Babić, Marija M., Jovašević Vuković, Jovana J., Vasiljević-Radović, Dana, Onjia, Antonije E., Filipović, Jovanka M., Tomić, Simonida Lj., "Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution" in Applied Surface Science, 338 (2015):178-189,
https://doi.org/10.1016/j.apsusc.2015.02.133 . .

TY  - JOUR
AU  - Antić, Katarina M.
AU  - Babić, Marija M.
AU  - Jovašević Vuković, Jovana J.
AU  - Vasiljević-Radović, Dana
AU  - Onjia, Antonije E.
AU  - Filipovic, Jovanka M
AU  - Tomić, Simonida Lj.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1764
AB  - Series of novel hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA), P(HEA/IA) copolymers, were prepared by free radical cross-linking copolymerization and investigated as potential adsorbents for Cd2+ removal from aqueous solution. The hydrogels before and after Cd2+ adsorption were characterized using FTIR, temperature sensitive. In order to evaluate adsorption behavior of samples various factors affecting the Cd2+ uptake behavior, such as: contact time, temperature, pH, ionic strength, adsorbent weight, competitive ions and initial concentration of the metal ions were investigated. Five adsorption isotherms and two kinetic models were studied. The adsorption behavior can be very well described by the pseudo-second order kinetic model and Langmuir isotherm. Multicomponent adsorption studies revealed that adsorption of cadmium depends on the type of metal ions present in the system. Desorption studies showed that hydrogel can be reused three times with only 15% loss of adsorption capacity. All results indicate that the sample with the highest IA content is the most promising adsorbent for Cd2+ removal.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution
VL  - 338
SP  - 178
EP  - 189
DO  - 10.1016/j.apsusc.2015.02.133
ER  - 

@article{
author = "Antić, Katarina M. and Babić, Marija M. and Jovašević Vuković, Jovana J. and Vasiljević-Radović, Dana and Onjia, Antonije E. and Filipovic, Jovanka M and Tomić, Simonida Lj.",
year = "2015",
abstract = "Series of novel hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA), P(HEA/IA) copolymers, were prepared by free radical cross-linking copolymerization and investigated as potential adsorbents for Cd2+ removal from aqueous solution. The hydrogels before and after Cd2+ adsorption were characterized using FTIR, temperature sensitive. In order to evaluate adsorption behavior of samples various factors affecting the Cd2+ uptake behavior, such as: contact time, temperature, pH, ionic strength, adsorbent weight, competitive ions and initial concentration of the metal ions were investigated. Five adsorption isotherms and two kinetic models were studied. The adsorption behavior can be very well described by the pseudo-second order kinetic model and Langmuir isotherm. Multicomponent adsorption studies revealed that adsorption of cadmium depends on the type of metal ions present in the system. Desorption studies showed that hydrogel can be reused three times with only 15% loss of adsorption capacity. All results indicate that the sample with the highest IA content is the most promising adsorbent for Cd2+ removal.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution",
volume = "338",
pages = "178-189",
doi = "10.1016/j.apsusc.2015.02.133"
}

Antić, K. M., Babić, M. M., Jovašević Vuković, J. J., Vasiljević-Radović, D., Onjia, A. E., Filipovic, J. M.,& Tomić, S. Lj.. (2015). Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution. in Applied Surface Science
Elsevier., 338, 178-189.
https://doi.org/10.1016/j.apsusc.2015.02.133

Antić KM, Babić MM, Jovašević Vuković JJ, Vasiljević-Radović D, Onjia AE, Filipovic JM, Tomić SL. Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution. in Applied Surface Science. 2015;338:178-189.
doi:10.1016/j.apsusc.2015.02.133 .

Antić, Katarina M., Babić, Marija M., Jovašević Vuković, Jovana J., Vasiljević-Radović, Dana, Onjia, Antonije E., Filipovic, Jovanka M, Tomić, Simonida Lj., "Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution" in Applied Surface Science, 338 (2015):178-189,
https://doi.org/10.1016/j.apsusc.2015.02.133 . .