TY  - JOUR
AU  - Pajnik, Jelena
AU  - Lukić, Ivana
AU  - Dikić, Jelena
AU  - Ašanin, Jelena
AU  - Gordić, Milan V.
AU  - Mišić, Dušan
AU  - Žižović, Irena
AU  - Korzeniowska, Malgorzata
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9705
AB  - In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO2) as a solvent. Experiments were performed at 35 °C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4–24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15–60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7–27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).
T2  - Molecules
T2  - Molecules
T1  - Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties
VL  - 25
IS  - 20
SP  - 4717
DO  - 10.3390/molecules25204717
ER  - 

@article{
author = "Pajnik, Jelena and Lukić, Ivana and Dikić, Jelena and Ašanin, Jelena and Gordić, Milan V. and Mišić, Dušan and Žižović, Irena and Korzeniowska, Malgorzata",
year = "2020",
abstract = "In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO2) as a solvent. Experiments were performed at 35 °C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4–24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15–60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7–27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).",
journal = "Molecules, Molecules",
title = "Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties",
volume = "25",
number = "20",
pages = "4717",
doi = "10.3390/molecules25204717"
}

Pajnik, J., Lukić, I., Dikić, J., Ašanin, J., Gordić, M. V., Mišić, D., Žižović, I.,& Korzeniowska, M.. (2020). Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties. in Molecules, 25(20), 4717.
https://doi.org/10.3390/molecules25204717

Pajnik J, Lukić I, Dikić J, Ašanin J, Gordić MV, Mišić D, Žižović I, Korzeniowska M. Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties. in Molecules. 2020;25(20):4717.
doi:10.3390/molecules25204717 .

Pajnik, Jelena, Lukić, Ivana, Dikić, Jelena, Ašanin, Jelena, Gordić, Milan V., Mišić, Dušan, Žižović, Irena, Korzeniowska, Malgorzata, "Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties" in Molecules, 25, no. 20 (2020):4717,
https://doi.org/10.3390/molecules25204717 . .

TY  - PAT
AU  - Radetić, Maja
AU  - Marković, Darka
AU  - Milovanović, Stoja
AU  - Žižović, Irena
AU  - Šaponjić, Zoran
AU  - Radoičić, Marija
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12273
T2  - Zavod za intelektualnu svojinu Republike Srbije
T1  - Plutajući fotokatalizator na bazi pene polikaprolaktona i nanočestica titan(IV)-oksida
T1  - Floating photocatalyst based on polycaprolactone foam and titanium dioxide nanoparticles
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12273
ER  - 

@misc{
author = "Radetić, Maja and Marković, Darka and Milovanović, Stoja and Žižović, Irena and Šaponjić, Zoran and Radoičić, Marija",
year = "2019",
journal = "Zavod za intelektualnu svojinu Republike Srbije",
title = "Plutajući fotokatalizator na bazi pene polikaprolaktona i nanočestica titan(IV)-oksida, Floating photocatalyst based on polycaprolactone foam and titanium dioxide nanoparticles",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12273"
}

Radetić, M., Marković, D., Milovanović, S., Žižović, I., Šaponjić, Z.,& Radoičić, M.. (2019). Plutajući fotokatalizator na bazi pene polikaprolaktona i nanočestica titan(IV)-oksida. in Zavod za intelektualnu svojinu Republike Srbije.
https://hdl.handle.net/21.15107/rcub_vinar_12273

Radetić M, Marković D, Milovanović S, Žižović I, Šaponjić Z, Radoičić M. Plutajući fotokatalizator na bazi pene polikaprolaktona i nanočestica titan(IV)-oksida. in Zavod za intelektualnu svojinu Republike Srbije. 2019;.
https://hdl.handle.net/21.15107/rcub_vinar_12273 .

Radetić, Maja, Marković, Darka, Milovanović, Stoja, Žižović, Irena, Šaponjić, Zoran, Radoičić, Marija, "Plutajući fotokatalizator na bazi pene polikaprolaktona i nanočestica titan(IV)-oksida" in Zavod za intelektualnu svojinu Republike Srbije (2019),
https://hdl.handle.net/21.15107/rcub_vinar_12273 .

TY  - JOUR
AU  - Milovanović, Stoja
AU  - Marković, Darka
AU  - Mraković, Ana Đ.
AU  - Kuska, Robert
AU  - Žižović, Irena T.
AU  - Frerich, Sulamith
AU  - Ivanović, Jasna
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0928493117342169
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8041
AB  - Amorphous, medical grade poly(D,L-lactic acid) (PLA) and poly(D,L-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO2) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO2 densities (273 kg/m3 and 630 kg/m3) and short processing times (2 h and 4 h) enabled thymol loading of 0.92%–6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 °C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4. © 2019 Elsevier B.V.
T2  - Materials Science and Engineering: C
T1  - Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release
VL  - 99
SP  - 394
EP  - 404
DO  - 10.1016/j.msec.2019.01.106
ER  - 

@article{
author = "Milovanović, Stoja and Marković, Darka and Mraković, Ana Đ. and Kuska, Robert and Žižović, Irena T. and Frerich, Sulamith and Ivanović, Jasna",
year = "2019",
abstract = "Amorphous, medical grade poly(D,L-lactic acid) (PLA) and poly(D,L-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO2) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO2 densities (273 kg/m3 and 630 kg/m3) and short processing times (2 h and 4 h) enabled thymol loading of 0.92%–6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 °C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4. © 2019 Elsevier B.V.",
journal = "Materials Science and Engineering: C",
title = "Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release",
volume = "99",
pages = "394-404",
doi = "10.1016/j.msec.2019.01.106"
}

Milovanović, S., Marković, D., Mraković, A. Đ., Kuska, R., Žižović, I. T., Frerich, S.,& Ivanović, J.. (2019). Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release. in Materials Science and Engineering: C, 99, 394-404.
https://doi.org/10.1016/j.msec.2019.01.106

Milovanović S, Marković D, Mraković AĐ, Kuska R, Žižović IT, Frerich S, Ivanović J. Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release. in Materials Science and Engineering: C. 2019;99:394-404.
doi:10.1016/j.msec.2019.01.106 .

Milovanović, Stoja, Marković, Darka, Mraković, Ana Đ., Kuska, Robert, Žižović, Irena T., Frerich, Sulamith, Ivanović, Jasna, "Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release" in Materials Science and Engineering: C, 99 (2019):394-404,
https://doi.org/10.1016/j.msec.2019.01.106 . .

TY  - JOUR
AU  - Marković, Darka
AU  - Milovanović, Stoja
AU  - Radovanović, Željko
AU  - Žižović, Irena T.
AU  - Šaponjić, Zoran
AU  - Radetić, Maja M.
PY  - 2018
UR  - http://link.springer.com/10.1007/s12221-018-8148-5
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7782
AB  - This study discusses a novel approach for fabrication of floating photocatalyst which can be efficiently exploited for photodegradation of dyes in aqueous solutions. A fabrication of the floating photocatalyst consisted of two steps: transformation of the poly(ε-caprolactone) beads (PCLb) into poly(ε-caprolactone) foam (PCLf) with porous structure in supercritical carbon-dioxide and subsequent loading of PCLf with TiO2 nanoparticles (NPs). Morphological characterization of the PCLf before and after TiO2 NPs loading was carried out by FESEM. The presence of titanium on the surface and inside the PCLf was detected by EDX. Photocatalytical activity of the floating photocatalyst was investigated in aqueous solution of textile dyes C.I. Acid Orange 7 (AO7) and C.I. Basic Yellow 28 (BY28) which were exposed to lamp that simulates the sun light. In addition to sustainable floatability for a long period of time, developed floating photocatalyst exhibited high rate of photodegradation since the complete discoloration of AO7 and BY28 solutions and photocatalysts alone occurred after 300 and 180 min of illumination, respectively. Its photocatalytic activity was preserved after three repeated photodegradation cycles with unchanged chemical structure that was confirmed by FTIR analysis.
T2  - Fibers and Polymers
T1  - Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO2 Nanoparticles for Removal of Textile Dyes
VL  - 19
IS  - 6
SP  - 1219
EP  - 1227
DO  - 10.1007/s12221-018-8148-5
ER  - 

@article{
author = "Marković, Darka and Milovanović, Stoja and Radovanović, Željko and Žižović, Irena T. and Šaponjić, Zoran and Radetić, Maja M.",
year = "2018",
abstract = "This study discusses a novel approach for fabrication of floating photocatalyst which can be efficiently exploited for photodegradation of dyes in aqueous solutions. A fabrication of the floating photocatalyst consisted of two steps: transformation of the poly(ε-caprolactone) beads (PCLb) into poly(ε-caprolactone) foam (PCLf) with porous structure in supercritical carbon-dioxide and subsequent loading of PCLf with TiO2 nanoparticles (NPs). Morphological characterization of the PCLf before and after TiO2 NPs loading was carried out by FESEM. The presence of titanium on the surface and inside the PCLf was detected by EDX. Photocatalytical activity of the floating photocatalyst was investigated in aqueous solution of textile dyes C.I. Acid Orange 7 (AO7) and C.I. Basic Yellow 28 (BY28) which were exposed to lamp that simulates the sun light. In addition to sustainable floatability for a long period of time, developed floating photocatalyst exhibited high rate of photodegradation since the complete discoloration of AO7 and BY28 solutions and photocatalysts alone occurred after 300 and 180 min of illumination, respectively. Its photocatalytic activity was preserved after three repeated photodegradation cycles with unchanged chemical structure that was confirmed by FTIR analysis.",
journal = "Fibers and Polymers",
title = "Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO2 Nanoparticles for Removal of Textile Dyes",
volume = "19",
number = "6",
pages = "1219-1227",
doi = "10.1007/s12221-018-8148-5"
}

Marković, D., Milovanović, S., Radovanović, Ž., Žižović, I. T., Šaponjić, Z.,& Radetić, M. M.. (2018). Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO2 Nanoparticles for Removal of Textile Dyes. in Fibers and Polymers, 19(6), 1219-1227.
https://doi.org/10.1007/s12221-018-8148-5

Marković D, Milovanović S, Radovanović Ž, Žižović IT, Šaponjić Z, Radetić MM. Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO2 Nanoparticles for Removal of Textile Dyes. in Fibers and Polymers. 2018;19(6):1219-1227.
doi:10.1007/s12221-018-8148-5 .

Marković, Darka, Milovanović, Stoja, Radovanović, Željko, Žižović, Irena T., Šaponjić, Zoran, Radetić, Maja M., "Floating Photocatalyst Based on Poly(ε-caprolactone) Foam and TiO2 Nanoparticles for Removal of Textile Dyes" in Fibers and Polymers, 19, no. 6 (2018):1219-1227,
https://doi.org/10.1007/s12221-018-8148-5 . .

TY  - JOUR
AU  - Marković, Darka
AU  - Milovanović, Stoja
AU  - Radoičić, Marija B.
AU  - Radovanović, Željko
AU  - Žižović, Irena T.
AU  - Šaponjić, Zoran
AU  - Radetić, Maja M.
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0352-51391800089M
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8018
AB  - This study discusses the possibility of immobilization of colloidal TiO2 nanoparticles (NPs) onto poly(ε-caprolactone) (PCL) beads and foams that could be utilized for the removal of textile dyes from water by photodegradation. PCL foams were fabricated by environmentally friendly treatment of PCL beads in supercritical carbon dioxide. PCL beads and foams loaded with colloidal TiO2 NPs were used as photocatalysts for the removal of the textile dyes C.I. Acid Orange 7 and C.I. Basic Yellow 28 from aqueous solutions (10 mg L-1) under illumination that simulated sunlight. Unlike the PCL beads, the PCL foams provided complete discoloration of the dye solution within 24 h of illumination. The PCL foams also exhibited excellent floatability that was maintained for more than four weeks. Additionally, their photocatalytic activity was preserved within three repeated photodegradation cycles, indicating that the floating photocatalyst provided superior photocatalytic activity compared to the non-floating PCL beads.
AB  - У овом раду је дискутована могућност имобилизације колоидних наночестица TiO2 на
перлама или пени од поли(ε-капролактона) (PCL) које би се искористиле за уклањање боја
за текстил из воде процесом фотодеградације. PCL пена је добијена еколошки прихватљивим третманом PCL перли у наткритичном CO2. PCL перле и пене су накнадно импрегниране колоидним наночестицама TiO2 и употребљене су као фотокатализатори за
уклањање боја за текстил C.I. Acid Orange 7 и C.I. Basic Yellow 28 из воденог раствора (10
mg L-1) при осветљењу које симулира сунчеву светлост. За разлику од PCL перли, PCL пене
су обезбедиле потпуно обезбојавање раствора боје током 24 h осветљавања. PCL пена је
такође показала одличну способност плутања која је очувана дуже од четири недеље.
Фотокаталитичка активност пена је задржана таком три поновљена циклуса испитивања
фотодеградације што указује да овај плутајући фотокатализатор показује супериорну
фотокаталитичку активност у поређењу са неплутајућим PCL перлама.
T2  - Journal of the Serbian Chemical Society
T1  - Removal of textile dyes from water by TiO2 nanoparticles immobilized on poly(ε-caprolactone) beads and foams
VL  - 83
IS  - 12
SP  - 1379
EP  - 1389
DO  - 10.2298/JSC180913089M
ER  - 

@article{
author = "Marković, Darka and Milovanović, Stoja and Radoičić, Marija B. and Radovanović, Željko and Žižović, Irena T. and Šaponjić, Zoran and Radetić, Maja M.",
year = "2018",
abstract = "This study discusses the possibility of immobilization of colloidal TiO2 nanoparticles (NPs) onto poly(ε-caprolactone) (PCL) beads and foams that could be utilized for the removal of textile dyes from water by photodegradation. PCL foams were fabricated by environmentally friendly treatment of PCL beads in supercritical carbon dioxide. PCL beads and foams loaded with colloidal TiO2 NPs were used as photocatalysts for the removal of the textile dyes C.I. Acid Orange 7 and C.I. Basic Yellow 28 from aqueous solutions (10 mg L-1) under illumination that simulated sunlight. Unlike the PCL beads, the PCL foams provided complete discoloration of the dye solution within 24 h of illumination. The PCL foams also exhibited excellent floatability that was maintained for more than four weeks. Additionally, their photocatalytic activity was preserved within three repeated photodegradation cycles, indicating that the floating photocatalyst provided superior photocatalytic activity compared to the non-floating PCL beads., У овом раду је дискутована могућност имобилизације колоидних наночестица TiO2 на
перлама или пени од поли(ε-капролактона) (PCL) које би се искористиле за уклањање боја
за текстил из воде процесом фотодеградације. PCL пена је добијена еколошки прихватљивим третманом PCL перли у наткритичном CO2. PCL перле и пене су накнадно импрегниране колоидним наночестицама TiO2 и употребљене су као фотокатализатори за
уклањање боја за текстил C.I. Acid Orange 7 и C.I. Basic Yellow 28 из воденог раствора (10
mg L-1) при осветљењу које симулира сунчеву светлост. За разлику од PCL перли, PCL пене
су обезбедиле потпуно обезбојавање раствора боје током 24 h осветљавања. PCL пена је
такође показала одличну способност плутања која је очувана дуже од четири недеље.
Фотокаталитичка активност пена је задржана таком три поновљена циклуса испитивања
фотодеградације што указује да овај плутајући фотокатализатор показује супериорну
фотокаталитичку активност у поређењу са неплутајућим PCL перлама.",
journal = "Journal of the Serbian Chemical Society",
title = "Removal of textile dyes from water by TiO2 nanoparticles immobilized on poly(ε-caprolactone) beads and foams",
volume = "83",
number = "12",
pages = "1379-1389",
doi = "10.2298/JSC180913089M"
}

Marković, D., Milovanović, S., Radoičić, M. B., Radovanović, Ž., Žižović, I. T., Šaponjić, Z.,& Radetić, M. M.. (2018). Removal of textile dyes from water by TiO2 nanoparticles immobilized on poly(ε-caprolactone) beads and foams. in Journal of the Serbian Chemical Society, 83(12), 1379-1389.
https://doi.org/10.2298/JSC180913089M

Marković D, Milovanović S, Radoičić MB, Radovanović Ž, Žižović IT, Šaponjić Z, Radetić MM. Removal of textile dyes from water by TiO2 nanoparticles immobilized on poly(ε-caprolactone) beads and foams. in Journal of the Serbian Chemical Society. 2018;83(12):1379-1389.
doi:10.2298/JSC180913089M .

Marković, Darka, Milovanović, Stoja, Radoičić, Marija B., Radovanović, Željko, Žižović, Irena T., Šaponjić, Zoran, Radetić, Maja M., "Removal of textile dyes from water by TiO2 nanoparticles immobilized on poly(ε-caprolactone) beads and foams" in Journal of the Serbian Chemical Society, 83, no. 12 (2018):1379-1389,
https://doi.org/10.2298/JSC180913089M . .