TY  - JOUR
AU  - Janićijević, Željko
AU  - Vujčić, Ivica
AU  - Veljović, Đorđe
AU  - Vujisić, Miloš
AU  - Radovanović, Filip
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4342
AB  - Composite hydrogels capable of controlled drug delivery via ion exchange are an interesting group of materials for the construction of implantable drug reservoirs for electrically charged drugs. In this study, we synthesized composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) (PLGA-PAA) hydrogels by sequential application of UV or gamma irradiation and traditional phase inversion. Physicochemical properties of the composite PLGAPAA hydrogels were investigated using Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). We examined the ion exchange capacity (IEC) and swelling behavior of these materials to determine their potential as drug reservoirs. Composite PLGA-PAA hydrogel synthesized using UV irradiation (UV-PLGA-PAA) exhibited a porous microstructure with submicron-sized hydrogel-rich aggregates and homogeneous chemical composition. Swelling behavior and IEC of this material were highly reproducible. Composite PLGA-PAA hydrogels synthesized using gamma irradiation (G-PLGA-PAAs) had a less uniform microstructure with larger pores and micron-sized hydrogel-rich aggregates while exhibiting rather inhomogeneous chemical composition. These materials showed superior swelling properties, but a more variable IEC, compared to the material fabricated using UV irradiation. Results of DSC analysis showed a dose-dependent decrease in glass transition temperature for G-PLGA-PAAs indicating the effects of PLGA chain scission. Our findings indicate that gamma irradiation is a possible alternative to UV irradiation in the synthesis of composite PLGA-PAA hydrogels which can modify or control important material properties. However, the synthesis protocol using gamma irradiation should be further optimized to improve the IEC reproducibility. In our future research, we will investigate the in vitro release of charged drugs from synthesized composite PLGA-PAA hydrogels under physiological conditions.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Radiation Physics and Chemistry
T1  - Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties
VL  - 166
DO  - 10.1016/j.radphyschem.2019.108466
ER  - 

@article{
author = "Janićijević, Željko and Vujčić, Ivica and Veljović, Đorđe and Vujisić, Miloš and Radovanović, Filip",
year = "2020",
abstract = "Composite hydrogels capable of controlled drug delivery via ion exchange are an interesting group of materials for the construction of implantable drug reservoirs for electrically charged drugs. In this study, we synthesized composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) (PLGA-PAA) hydrogels by sequential application of UV or gamma irradiation and traditional phase inversion. Physicochemical properties of the composite PLGAPAA hydrogels were investigated using Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). We examined the ion exchange capacity (IEC) and swelling behavior of these materials to determine their potential as drug reservoirs. Composite PLGA-PAA hydrogel synthesized using UV irradiation (UV-PLGA-PAA) exhibited a porous microstructure with submicron-sized hydrogel-rich aggregates and homogeneous chemical composition. Swelling behavior and IEC of this material were highly reproducible. Composite PLGA-PAA hydrogels synthesized using gamma irradiation (G-PLGA-PAAs) had a less uniform microstructure with larger pores and micron-sized hydrogel-rich aggregates while exhibiting rather inhomogeneous chemical composition. These materials showed superior swelling properties, but a more variable IEC, compared to the material fabricated using UV irradiation. Results of DSC analysis showed a dose-dependent decrease in glass transition temperature for G-PLGA-PAAs indicating the effects of PLGA chain scission. Our findings indicate that gamma irradiation is a possible alternative to UV irradiation in the synthesis of composite PLGA-PAA hydrogels which can modify or control important material properties. However, the synthesis protocol using gamma irradiation should be further optimized to improve the IEC reproducibility. In our future research, we will investigate the in vitro release of charged drugs from synthesized composite PLGA-PAA hydrogels under physiological conditions.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Radiation Physics and Chemistry",
title = "Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties",
volume = "166",
doi = "10.1016/j.radphyschem.2019.108466"
}

Janićijević, Ž., Vujčić, I., Veljović, Đ., Vujisić, M.,& Radovanović, F.. (2020). Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties. in Radiation Physics and Chemistry
Pergamon-Elsevier Science Ltd, Oxford., 166.
https://doi.org/10.1016/j.radphyschem.2019.108466

Janićijević Ž, Vujčić I, Veljović Đ, Vujisić M, Radovanović F. Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties. in Radiation Physics and Chemistry. 2020;166.
doi:10.1016/j.radphyschem.2019.108466 .

Janićijević, Željko, Vujčić, Ivica, Veljović, Đorđe, Vujisić, Miloš, Radovanović, Filip, "Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties" in Radiation Physics and Chemistry, 166 (2020),
https://doi.org/10.1016/j.radphyschem.2019.108466 . .

TY  - JOUR
AU  - Tomković, Tanja
AU  - Radovanović, Filip
AU  - Grgur, Branimir
AU  - Nastasović, Aleksandra
AU  - Vasiljević-Radović, Dana
AU  - Onjia, Antonije
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3255
AB  - A novel method combining a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution was used to prepare asymmetric polyethersulfone membranes with submicron particles incorporating glycidyl methacrylate copolymer. In order to introduce sulfonic groups, the epoxide rings of glycidyl methacrylate were opened using two methods. The first method was functionalization with sodium sulfite, and the second was functionalization with sulfuric acid and then grafting with 2-acrylamido-2-methylpropanesulfonic acid. The obtained membranes were characterized using infrared spectroscopy, conductometric titration and water permeability measurements. Scanning electron microscopy and atomic force microscopy were used to investigate the surface morphology and topology of the membranes. Dynamic adsorption of rhodamine B as a model dye was used to demonstrate the suitability of these novel membranes for membrane adsorption since the adsorption capacity for dye cations was much better for the membranes functionalized with sodium sulfite and the membranes grafted with 2-acrylamido-2-methylpropanesulfonic acid compared to the non-functionalized membranes.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Novel negatively charged membrane adsorbers made using a combination of photopolymerization and immersion precipitation
EP  - 431
IS  - 4
SP  - 419
VL  - 81
DO  - 10.2298/JSC150805083T
ER  - 

@article{
author = "Tomković, Tanja and Radovanović, Filip and Grgur, Branimir and Nastasović, Aleksandra and Vasiljević-Radović, Dana and Onjia, Antonije",
year = "2016",
abstract = "A novel method combining a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution was used to prepare asymmetric polyethersulfone membranes with submicron particles incorporating glycidyl methacrylate copolymer. In order to introduce sulfonic groups, the epoxide rings of glycidyl methacrylate were opened using two methods. The first method was functionalization with sodium sulfite, and the second was functionalization with sulfuric acid and then grafting with 2-acrylamido-2-methylpropanesulfonic acid. The obtained membranes were characterized using infrared spectroscopy, conductometric titration and water permeability measurements. Scanning electron microscopy and atomic force microscopy were used to investigate the surface morphology and topology of the membranes. Dynamic adsorption of rhodamine B as a model dye was used to demonstrate the suitability of these novel membranes for membrane adsorption since the adsorption capacity for dye cations was much better for the membranes functionalized with sodium sulfite and the membranes grafted with 2-acrylamido-2-methylpropanesulfonic acid compared to the non-functionalized membranes.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Novel negatively charged membrane adsorbers made using a combination of photopolymerization and immersion precipitation",
pages = "431-419",
number = "4",
volume = "81",
doi = "10.2298/JSC150805083T"
}

Tomković, T., Radovanović, F., Grgur, B., Nastasović, A., Vasiljević-Radović, D.,& Onjia, A.. (2016). Novel negatively charged membrane adsorbers made using a combination of photopolymerization and immersion precipitation. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 81(4), 419-431.
https://doi.org/10.2298/JSC150805083T

Tomković T, Radovanović F, Grgur B, Nastasović A, Vasiljević-Radović D, Onjia A. Novel negatively charged membrane adsorbers made using a combination of photopolymerization and immersion precipitation. in Journal of the Serbian Chemical Society. 2016;81(4):419-431.
doi:10.2298/JSC150805083T .

Tomković, Tanja, Radovanović, Filip, Grgur, Branimir, Nastasović, Aleksandra, Vasiljević-Radović, Dana, Onjia, Antonije, "Novel negatively charged membrane adsorbers made using a combination of photopolymerization and immersion precipitation" in Journal of the Serbian Chemical Society, 81, no. 4 (2016):419-431,
https://doi.org/10.2298/JSC150805083T . .

TY  - JOUR
AU  - Tomković, Tanja
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Vasiljević-Radović, Dana
AU  - Marković, Jelena P.
AU  - Grgur, Branimir
AU  - Onjia, Antonije
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3048
AB  - Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a traditional liquid phase inversion process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. Scanning electron microscope images of the membrane cross-section revealed a hybrid structure with an interconnected network of submicron particles embedded within the porous polyethersulfone support. Permeation of toluidine blue solutions through non-functionalized membranes showed a dramatic effect of 2-acrylamido-2-methylpropane sulfonic acid concentration in the casting solution on the dynamic adsorption performance. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of dilute Cu2+ solutions through functionalized membranes demonstrated that the plate height for some of these membranes was an order of magnitude smaller than for commercial particle-filled membranes used in solid phase extraction.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Solid phase extraction membranes with submicron multifunctional adsorbent particles
EP  - 100
SP  - 90
VL  - 63
DO  - 10.1016/j.eurpolymj.2014.12.015
ER  - 

@article{
author = "Tomković, Tanja and Radovanović, Filip and Nastasović, Aleksandra and Vasiljević-Radović, Dana and Marković, Jelena P. and Grgur, Branimir and Onjia, Antonije",
year = "2015",
abstract = "Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a traditional liquid phase inversion process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. Scanning electron microscope images of the membrane cross-section revealed a hybrid structure with an interconnected network of submicron particles embedded within the porous polyethersulfone support. Permeation of toluidine blue solutions through non-functionalized membranes showed a dramatic effect of 2-acrylamido-2-methylpropane sulfonic acid concentration in the casting solution on the dynamic adsorption performance. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of dilute Cu2+ solutions through functionalized membranes demonstrated that the plate height for some of these membranes was an order of magnitude smaller than for commercial particle-filled membranes used in solid phase extraction.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Solid phase extraction membranes with submicron multifunctional adsorbent particles",
pages = "100-90",
volume = "63",
doi = "10.1016/j.eurpolymj.2014.12.015"
}

Tomković, T., Radovanović, F., Nastasović, A., Vasiljević-Radović, D., Marković, J. P., Grgur, B.,& Onjia, A.. (2015). Solid phase extraction membranes with submicron multifunctional adsorbent particles. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 63, 90-100.
https://doi.org/10.1016/j.eurpolymj.2014.12.015

Tomković T, Radovanović F, Nastasović A, Vasiljević-Radović D, Marković JP, Grgur B, Onjia A. Solid phase extraction membranes with submicron multifunctional adsorbent particles. in European Polymer Journal. 2015;63:90-100.
doi:10.1016/j.eurpolymj.2014.12.015 .

Tomković, Tanja, Radovanović, Filip, Nastasović, Aleksandra, Vasiljević-Radović, Dana, Marković, Jelena P., Grgur, Branimir, Onjia, Antonije, "Solid phase extraction membranes with submicron multifunctional adsorbent particles" in European Polymer Journal, 63 (2015):90-100,
https://doi.org/10.1016/j.eurpolymj.2014.12.015 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nastasović, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Marković, Jelena P.
AU  - Onjia, Antonije
AU  - Radovanović, Filip
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2917
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 Sci Ltd, Oxford
T2  - Journal of Environmental Chemical Engineering
T1  - Novel membrane-supported hydrogel for removal of heavy metals
EP  - 461
IS  - 1
SP  - 453
VL  - 3
DO  - 10.1016/j.jece.2015.01.005
ER  - 

@article{
author = "Stajčić, Aleksandar and Nastasović, Aleksandra and Stajić-Trošić, Jasna and Marković, Jelena P. and Onjia, Antonije 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 Sci Ltd, Oxford",
journal = "Journal of Environmental Chemical Engineering",
title = "Novel membrane-supported hydrogel for removal of heavy metals",
pages = "461-453",
number = "1",
volume = "3",
doi = "10.1016/j.jece.2015.01.005"
}

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

Stajčić A, Nastasović A, Stajić-Trošić J, Marković JP, Onjia A, 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, Marković, Jelena P., Onjia, Antonije, 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 . .

TY  - JOUR
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Tomković, Tanja
AU  - Vasiljević-Radović, Dana
AU  - Nešić, Aleksandra
AU  - Veličković, Sava
AU  - Onjia, Antonije
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2836
AB  - Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.
PB  - Elsevier Science Bv, Amsterdam
T2  - Reactive & Functional Polymers
T1  - Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate
EP  - 10
SP  - 1
VL  - 77
DO  - 10.1016/j.reactfunctpolym.2014.01.007
ER  - 

@article{
author = "Radovanović, Filip and Nastasović, Aleksandra and Tomković, Tanja and Vasiljević-Radović, Dana and Nešić, Aleksandra and Veličković, Sava and Onjia, Antonije",
year = "2014",
abstract = "Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Reactive & Functional Polymers",
title = "Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate",
pages = "10-1",
volume = "77",
doi = "10.1016/j.reactfunctpolym.2014.01.007"
}

Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S.,& Onjia, A.. (2014). Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. in Reactive & Functional Polymers
Elsevier Science Bv, Amsterdam., 77, 1-10.
https://doi.org/10.1016/j.reactfunctpolym.2014.01.007

Radovanović F, Nastasović A, Tomković T, Vasiljević-Radović D, Nešić A, Veličković S, Onjia A. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. in Reactive & Functional Polymers. 2014;77:1-10.
doi:10.1016/j.reactfunctpolym.2014.01.007 .

Radovanović, Filip, Nastasović, Aleksandra, Tomković, Tanja, Vasiljević-Radović, Dana, Nešić, Aleksandra, Veličković, Sava, Onjia, Antonije, "Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate" in Reactive & Functional Polymers, 77 (2014):1-10,
https://doi.org/10.1016/j.reactfunctpolym.2014.01.007 . .

TY  - DATA
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Tomković, Tanja
AU  - Vasiljević-Radović, Dana
AU  - Nešić, Aleksandra
AU  - Veličković, Sava
AU  - Onjia, Antonije
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2577
AB  - Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.
PB  - Elsevier, Amsterdam
T2  - Reactive & Functional Polymers
T1  - Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007
UR  - https://hdl.handle.net/21.15107/rcub_dais_4728
ER  - 

@misc{
author = "Radovanović, Filip and Nastasović, Aleksandra and Tomković, Tanja and Vasiljević-Radović, Dana and Nešić, Aleksandra and Veličković, Sava and Onjia, Antonije",
year = "2014",
abstract = "Asymmetric polyethersulfone membranes with submicron particles comprising crosslinked glycidyl methacrylate copolymer were prepared by a combination of a traditional immersion precipitation process for making membranes with photopolymerization and crosslinking of functional monomers included in the casting solution. As the concentration of polymerizable monomers increased the original macrovoid structure was replaced by a hybrid morphology with microglobules typical of macroporous methacrylate adsorbers embedded within microporous structure with no significant effects on water permeability. The epoxide groups present in glycidyl methacrylate copolymer were transformed into amine functionalities by ring opening under alkaline conditions. Permeation of Orange G solution at low transmembrane pressures was used to demonstrate suitability of these novel membranes for membrane adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Reactive & Functional Polymers",
title = "Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007",
url = "https://hdl.handle.net/21.15107/rcub_dais_4728"
}

Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S.,& Onjia, A.. (2014). Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007. in Reactive & Functional Polymers
Elsevier, Amsterdam..
https://hdl.handle.net/21.15107/rcub_dais_4728

Radovanović F, Nastasović A, Tomković T, Vasiljević-Radović D, Nešić A, Veličković S, Onjia A. Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007. in Reactive & Functional Polymers. 2014;.
https://hdl.handle.net/21.15107/rcub_dais_4728 .

Radovanović, Filip, Nastasović, Aleksandra, Tomković, Tanja, Vasiljević-Radović, Dana, Nešić, Aleksandra, Veličković, Sava, Onjia, Antonije, "Supplementary materials for the article: Radovanović, F., Nastasović, A., Tomković, T., Vasiljević-Radović, D., Nešić, A., Veličković, S., Onjia, A., 2014. Novel membrane adsorbers incorporating functionalized polyglycidyl methacrylate. Reactive and Functional Polymers 77, 1–10. https://doi.org/10.1016/j.reactfunctpolym.2014.01.007" in Reactive & Functional Polymers (2014),
https://hdl.handle.net/21.15107/rcub_dais_4728 .

TY  - CONF
AU  - Tomković, Tanja
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Marković, Jelena
AU  - Ekmeščić, Bojana
AU  - Vidojković, Sonja
AU  - Onjia, Antonije
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2582
AB  - Novel polyethersulfone membranes with integrated submicron adsorbent particles were prepared by combining photoirradiation with liquid phase inversion. These particles consist of cross-linked poly(glycidyl methacrylate-co-acrylamido-2-methylpropane sulfonic acid), pGMA-AMPS. After membrane preparation, the epoxide groups were reacted with diethylene triamine to incorporate amine functionalities. Membranes were characterized using FTIR-ATR, SEM and dynamic adsorption of copper from a dilute solution. Effects of monomer concentrations on the properties and separation performance of membrane adsorbers are presented.
PB  - Belgrade, Serbia : Society of Physical Chemists of Serbia
C3  - Proceedings of the 12th International Conference on Fundamental and Applied Aspects of Physical Chem
T1  - Polyethersulfone membranes with integrated adsorbent particles for heavy metals capture
EP  - 790
SP  - 787
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7531
ER  - 

@conference{
author = "Tomković, Tanja and Radovanović, Filip and Nastasović, Aleksandra and Marković, Jelena and Ekmeščić, Bojana and Vidojković, Sonja and Onjia, Antonije",
year = "2014",
abstract = "Novel polyethersulfone membranes with integrated submicron adsorbent particles were prepared by combining photoirradiation with liquid phase inversion. These particles consist of cross-linked poly(glycidyl methacrylate-co-acrylamido-2-methylpropane sulfonic acid), pGMA-AMPS. After membrane preparation, the epoxide groups were reacted with diethylene triamine to incorporate amine functionalities. Membranes were characterized using FTIR-ATR, SEM and dynamic adsorption of copper from a dilute solution. Effects of monomer concentrations on the properties and separation performance of membrane adsorbers are presented.",
publisher = "Belgrade, Serbia : Society of Physical Chemists of Serbia",
journal = "Proceedings of the 12th International Conference on Fundamental and Applied Aspects of Physical Chem",
title = "Polyethersulfone membranes with integrated adsorbent particles for heavy metals capture",
pages = "790-787",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7531"
}

Tomković, T., Radovanović, F., Nastasović, A., Marković, J., Ekmeščić, B., Vidojković, S.,& Onjia, A.. (2014). Polyethersulfone membranes with integrated adsorbent particles for heavy metals capture. in Proceedings of the 12th International Conference on Fundamental and Applied Aspects of Physical Chem
Belgrade, Serbia : Society of Physical Chemists of Serbia., 787-790.
https://hdl.handle.net/21.15107/rcub_vinar_7531

Tomković T, Radovanović F, Nastasović A, Marković J, Ekmeščić B, Vidojković S, Onjia A. Polyethersulfone membranes with integrated adsorbent particles for heavy metals capture. in Proceedings of the 12th International Conference on Fundamental and Applied Aspects of Physical Chem. 2014;:787-790.
https://hdl.handle.net/21.15107/rcub_vinar_7531 .

Tomković, Tanja, Radovanović, Filip, Nastasović, Aleksandra, Marković, Jelena, Ekmeščić, Bojana, Vidojković, Sonja, Onjia, Antonije, "Polyethersulfone membranes with integrated adsorbent particles for heavy metals capture" in Proceedings of the 12th International Conference on Fundamental and Applied Aspects of Physical Chem (2014):787-790,
https://hdl.handle.net/21.15107/rcub_vinar_7531 .

TY  - CONF
AU  - Tomković, Tanja
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Vasiljević-Radović, Dana
AU  - Onjia, Antonije
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2284
AB  - Membrane adsorption has started to replace fixed bed chromatography for separation and purification of small quantities of valuable species in biotechnology and related areas. Membrane functionalization is usually required to introduce affinity groups for these applications. In this work novel membranes adsorbers were prepared by combining liquid phase inversion with photopolymerization of the solution comprising polyethersulfone, glycidyl methacrylate, sodium salt of 2-acrylamido-2-methylpropane sulfonic acid and a cross-linker. Membranes were characterized using SEM, AFM, FTIR, titration and water permeability measurements. Dynamic adsorption of Toluidine blue as a model dye was used to demonstrate suitability of these novel membranes for membrane adsorption.
PB  - Belgrade: Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
T1  - Novel membrane adsorbers incorporating cross-linked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid)
SP  - 38
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2284
ER  - 

@conference{
author = "Tomković, Tanja and Radovanović, Filip and Nastasović, Aleksandra and Vasiljević-Radović, Dana and Onjia, Antonije",
year = "2013",
abstract = "Membrane adsorption has started to replace fixed bed chromatography for separation and purification of small quantities of valuable species in biotechnology and related areas. Membrane functionalization is usually required to introduce affinity groups for these applications. In this work novel membranes adsorbers were prepared by combining liquid phase inversion with photopolymerization of the solution comprising polyethersulfone, glycidyl methacrylate, sodium salt of 2-acrylamido-2-methylpropane sulfonic acid and a cross-linker. Membranes were characterized using SEM, AFM, FTIR, titration and water permeability measurements. Dynamic adsorption of Toluidine blue as a model dye was used to demonstrate suitability of these novel membranes for membrane adsorption.",
publisher = "Belgrade: Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng",
title = "Novel membrane adsorbers incorporating cross-linked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid)",
pages = "38",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2284"
}

Tomković, T., Radovanović, F., Nastasović, A., Vasiljević-Radović, D.,& Onjia, A.. (2013). Novel membrane adsorbers incorporating cross-linked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid). in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
Belgrade: Institute of Technical Sciences of SASA., 38.
https://hdl.handle.net/21.15107/rcub_technorep_2284

Tomković T, Radovanović F, Nastasović A, Vasiljević-Radović D, Onjia A. Novel membrane adsorbers incorporating cross-linked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid). in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng. 2013;:38.
https://hdl.handle.net/21.15107/rcub_technorep_2284 .

Tomković, Tanja, Radovanović, Filip, Nastasović, Aleksandra, Vasiljević-Radović, Dana, Onjia, Antonije, "Novel membrane adsorbers incorporating cross-linked poly(glycidyl methacrylate-co-2-acrylamido-2-methylpropane sulfonic acid)" in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng (2013):38,
https://hdl.handle.net/21.15107/rcub_technorep_2284 .

TY  - CONF
AU  - Stajčić, Aleksandar
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Marković, Jelena
AU  - Onjia, Antonije
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2274
AB  - Hydrogels containing strong acid groups have been used in the past for the removal of heavy metals. Unfortunately such hydrogels exhibit poor mechanical properties and are generally difficult to handle. In this work we prepared asymmetric membranes incorporatingcross-linked 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) hydrogel by combining photopolymerization and liquid phase inversion. An experimental design measuring water content and ion-exchange capacity of these membranes was used to select the optimal membrane composition for the removal of Pb2+, Ni2+, and Cd2+ ions from aqueous solutions. The results demonstrated fast sorption kinetics and high capacity for the investigated metals.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
T1  - Asymmetric hydrogel membranes for heavy metal adsorption
EP  - 40
SP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7536
ER  - 

@conference{
author = "Stajčić, Aleksandar and Radovanović, Filip and Nastasović, Aleksandra and Stajić-Trošić, Jasna and Marković, Jelena and Onjia, Antonije",
year = "2013",
abstract = "Hydrogels containing strong acid groups have been used in the past for the removal of heavy metals. Unfortunately such hydrogels exhibit poor mechanical properties and are generally difficult to handle. In this work we prepared asymmetric membranes incorporatingcross-linked 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) hydrogel by combining photopolymerization and liquid phase inversion. An experimental design measuring water content and ion-exchange capacity of these membranes was used to select the optimal membrane composition for the removal of Pb2+, Ni2+, and Cd2+ ions from aqueous solutions. The results demonstrated fast sorption kinetics and high capacity for the investigated metals.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng",
title = "Asymmetric hydrogel membranes for heavy metal adsorption",
pages = "40-40",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7536"
}

Stajčić, A., Radovanović, F., Nastasović, A., Stajić-Trošić, J., Marković, J.,& Onjia, A.. (2013). Asymmetric hydrogel membranes for heavy metal adsorption. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
Belgrade : Institute of Technical Sciences of SASA., 40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7536

Stajčić A, Radovanović F, Nastasović A, Stajić-Trošić J, Marković J, Onjia A. Asymmetric hydrogel membranes for heavy metal adsorption. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng. 2013;:40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7536 .

Stajčić, Aleksandar, Radovanović, Filip, Nastasović, Aleksandra, Stajić-Trošić, Jasna, Marković, Jelena, Onjia, Antonije, "Asymmetric hydrogel membranes for heavy metal adsorption" in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng (2013):40-40,
https://hdl.handle.net/21.15107/rcub_vinar_7536 .

TY  - CONF
AU  - Radovanović, Filip
AU  - Tomković, Tanja
AU  - Nastasović, Aleksandra
AU  - Veličković, Sava
AU  - Nešić, Aleksandra
AU  - Onjia, Antonije
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2286
AB  - Polyethersulfone (PES) is frequently used for high-performance ultrafiltration membranes. Functionalization of PES membranes is required to introduce new groups for specific applications, such as affinity membranes for bioseparations [1]. Functionalization methods include bulk modification of PES material, blending of PES with another material, or surface modification of PES membranes [2]. In this work a novel method for introducing functional groups in asymmetric PES membranes is presented [3]. A cast film comprising PES, glycidyl methacrylate (GMA) and a common solvent was exposed to UV irradiation to form a gel of crosslinked polyGMA. The gel was then immersed in a water bath to create an asymmetric membrane with crosslinked polyGMA particles, as shown in Fig. 1. A simple treatment of these membranes with diethylene triamine was used to open the epoxide rings in polyGMA particles and introduce amine functional groups. The effects of monomer concentrations on the properties and separation performance of these novel membrane adsorbers will be presented.
PB  - Belgrade : Serbian Chemical Society
C3  - 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC
T1  - Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles
EP  - 128
SP  - 128
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7534
ER  - 

@conference{
author = "Radovanović, Filip and Tomković, Tanja and Nastasović, Aleksandra and Veličković, Sava and Nešić, Aleksandra and Onjia, Antonije",
year = "2013",
abstract = "Polyethersulfone (PES) is frequently used for high-performance ultrafiltration membranes. Functionalization of PES membranes is required to introduce new groups for specific applications, such as affinity membranes for bioseparations [1]. Functionalization methods include bulk modification of PES material, blending of PES with another material, or surface modification of PES membranes [2]. In this work a novel method for introducing functional groups in asymmetric PES membranes is presented [3]. A cast film comprising PES, glycidyl methacrylate (GMA) and a common solvent was exposed to UV irradiation to form a gel of crosslinked polyGMA. The gel was then immersed in a water bath to create an asymmetric membrane with crosslinked polyGMA particles, as shown in Fig. 1. A simple treatment of these membranes with diethylene triamine was used to open the epoxide rings in polyGMA particles and introduce amine functional groups. The effects of monomer concentrations on the properties and separation performance of these novel membrane adsorbers will be presented.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC",
title = "Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles",
pages = "128-128",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7534"
}

Radovanović, F., Tomković, T., Nastasović, A., Veličković, S., Nešić, A.,& Onjia, A.. (2013). Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC
Belgrade : Serbian Chemical Society., 128-128.
https://hdl.handle.net/21.15107/rcub_vinar_7534

Radovanović F, Tomković T, Nastasović A, Veličković S, Nešić A, Onjia A. Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC. 2013;:128-128.
https://hdl.handle.net/21.15107/rcub_vinar_7534 .

Radovanović, Filip, Tomković, Tanja, Nastasović, Aleksandra, Veličković, Sava, Nešić, Aleksandra, Onjia, Antonije, "Asymmetric polyethersulfone membranes with crosslinked poly(glycidyl methacrylate) particles" in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC (2013):128-128,
https://hdl.handle.net/21.15107/rcub_vinar_7534 .

TY  - CONF
AU  - Radovanović, Filip
AU  - Tomković, Tanja
AU  - Nastasović, Aleksandra
AU  - Veličković, Sava
AU  - Nešić, Aleksandra
AU  - Onjia, Antonije
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2285
AB  - Ultrafiltration (UF) membranes are currently used in industry for the concentration of proteins and other macromolecules. Performance of UF membranes is generally limited by a trade-off between permeability and selectivity [1]. However, electrically-charged ultrafiltration membranes can provide a dramatic improvement in ultrafiltration performance [2]. Novel UF membranes were made by combining traditional immersion precipitation process for making membranes with photopolymerization of the casting solution comprising polyethersulfone, glycidyl methacrylate and other reactive monomers. Negative charges were introduced either by initially using 2-acrylamido-2-methylpropane sulfonic acid as a reactive monomer, or were later created by epoxide ring opening of crosslinked glycidyl methacrylate. As shown in Fig. 1, selectivity of these membranes significantly improved as the concentration of negatively-charged groups in the membrane increased. The effects of membrane composition on the properties and separation performance of these novel UF membranes will be presented.
PB  - Belgrade : Serbian Chemical Society
C3  - 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC
T1  - Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization
EP  - 131
SP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7535
ER  - 

@conference{
author = "Radovanović, Filip and Tomković, Tanja and Nastasović, Aleksandra and Veličković, Sava and Nešić, Aleksandra and Onjia, Antonije",
year = "2013",
abstract = "Ultrafiltration (UF) membranes are currently used in industry for the concentration of proteins and other macromolecules. Performance of UF membranes is generally limited by a trade-off between permeability and selectivity [1]. However, electrically-charged ultrafiltration membranes can provide a dramatic improvement in ultrafiltration performance [2]. Novel UF membranes were made by combining traditional immersion precipitation process for making membranes with photopolymerization of the casting solution comprising polyethersulfone, glycidyl methacrylate and other reactive monomers. Negative charges were introduced either by initially using 2-acrylamido-2-methylpropane sulfonic acid as a reactive monomer, or were later created by epoxide ring opening of crosslinked glycidyl methacrylate. As shown in Fig. 1, selectivity of these membranes significantly improved as the concentration of negatively-charged groups in the membrane increased. The effects of membrane composition on the properties and separation performance of these novel UF membranes will be presented.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC",
title = "Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization",
pages = "131-131",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7535"
}

Radovanović, F., Tomković, T., Nastasović, A., Veličković, S., Nešić, A.,& Onjia, A.. (2013). Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC
Belgrade : Serbian Chemical Society., 131-131.
https://hdl.handle.net/21.15107/rcub_vinar_7535

Radovanović F, Tomković T, Nastasović A, Veličković S, Nešić A, Onjia A. Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization. in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC. 2013;:131-131.
https://hdl.handle.net/21.15107/rcub_vinar_7535 .

Radovanović, Filip, Tomković, Tanja, Nastasović, Aleksandra, Veličković, Sava, Nešić, Aleksandra, Onjia, Antonije, "Novel negatively-charged ultrafiltration membranes made by a combination of immersion precipitation and photopolymerization" in 8th International Conference of the Chemical Societies of the South-East European Countries - ICOSEC (2013):131-131,
https://hdl.handle.net/21.15107/rcub_vinar_7535 .