Ostojić, Sanja

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Authority KeyName Variants
orcid::0000-0002-9853-1189
  • Ostojić, Sanja (8)
  • Ostojić, Sanja B. (1)
Projects

Author's Bibliography

Hydrogels reinforced with nanoclays with improved response rate

Đonlagić, Jasna; Lancuski, Anica; Nikolić, Marija; Rogan, Jelena; Ostojić, Sanja; Petrović, Zoran

(Wiley-Blackwell, Hoboken, 2017)

TY  - JOUR
AU  - Đonlagić, Jasna
AU  - Lancuski, Anica
AU  - Nikolić, Marija
AU  - Rogan, Jelena
AU  - Ostojić, Sanja
AU  - Petrović, Zoran
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3661
AB  - Two series of semiinterpenetrating networks (SIPN) based on linear hydrophilic poly(vinyl alcohol) (PVA) and thermoresponsive poly(N-isopropylacrylamide) (PNIPA), physically crosslinked with inorganic clay, are presented. The hydrogels with different crosslinking densities were prepared by varying the content of clay from 1 to 6 wt % and contained linear interpenetrant, PVA in the range of 0.5-1.5 wt %. The effect of clay content on swelling/deswelling behavior and phase transition in PNIPA gels, as well as the feasibility of reinforcing the gels with high molecular weight PVA, were analyzed. The thermal response of hydrogels, followed by DSC, confirmed that the insertion of hydrophilic PVA did not have a significant effect on the onset of the volume phase transition temperature, while the response was faster. The equilibrium degree of swelling of SIPNs and PNIPA hydrogels was in the range of 979 and decreased with increasing content of clay. The internal morphology and surface wettability of the hydrogels were investigated by scanning electron microscope analysis and contact angle measurements, respectively. The network structural parameters of the PNIPA and SIPN nanocomposites hydrogels, such as the average molecular weight between crosslinks, M-c, and effective crosslinking density, Ne, were determined by dynamic mechanical analysis.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Hydrogels reinforced with nanoclays with improved response rate
IS  - 9
VL  - 134
DO  - 10.1002/app.44535
ER  - 
@article{
author = "Đonlagić, Jasna and Lancuski, Anica and Nikolić, Marija and Rogan, Jelena and Ostojić, Sanja and Petrović, Zoran",
year = "2017",
abstract = "Two series of semiinterpenetrating networks (SIPN) based on linear hydrophilic poly(vinyl alcohol) (PVA) and thermoresponsive poly(N-isopropylacrylamide) (PNIPA), physically crosslinked with inorganic clay, are presented. The hydrogels with different crosslinking densities were prepared by varying the content of clay from 1 to 6 wt % and contained linear interpenetrant, PVA in the range of 0.5-1.5 wt %. The effect of clay content on swelling/deswelling behavior and phase transition in PNIPA gels, as well as the feasibility of reinforcing the gels with high molecular weight PVA, were analyzed. The thermal response of hydrogels, followed by DSC, confirmed that the insertion of hydrophilic PVA did not have a significant effect on the onset of the volume phase transition temperature, while the response was faster. The equilibrium degree of swelling of SIPNs and PNIPA hydrogels was in the range of 979 and decreased with increasing content of clay. The internal morphology and surface wettability of the hydrogels were investigated by scanning electron microscope analysis and contact angle measurements, respectively. The network structural parameters of the PNIPA and SIPN nanocomposites hydrogels, such as the average molecular weight between crosslinks, M-c, and effective crosslinking density, Ne, were determined by dynamic mechanical analysis.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Hydrogels reinforced with nanoclays with improved response rate",
number = "9",
volume = "134",
doi = "10.1002/app.44535"
}
Đonlagić, J., Lancuski, A., Nikolić, M., Rogan, J., Ostojić, S.,& Petrović, Z.. (2017). Hydrogels reinforced with nanoclays with improved response rate. in Journal of Applied Polymer Science
Wiley-Blackwell, Hoboken., 134(9).
https://doi.org/10.1002/app.44535
Đonlagić J, Lancuski A, Nikolić M, Rogan J, Ostojić S, Petrović Z. Hydrogels reinforced with nanoclays with improved response rate. in Journal of Applied Polymer Science. 2017;134(9).
doi:10.1002/app.44535 .
Đonlagić, Jasna, Lancuski, Anica, Nikolić, Marija, Rogan, Jelena, Ostojić, Sanja, Petrović, Zoran, "Hydrogels reinforced with nanoclays with improved response rate" in Journal of Applied Polymer Science, 134, no. 9 (2017),
https://doi.org/10.1002/app.44535 . .
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Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials

Nešić, Aleksandra; Ružić, Jovana; Gordić, Milan V.; Ostojić, Sanja; Micić, Darko; Onjia, Antonije

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Ružić, Jovana
AU  - Gordić, Milan V.
AU  - Ostojić, Sanja
AU  - Micić, Darko
AU  - Onjia, Antonije
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3696
AB  - In this work, the new biodegradable blend films composed of natural polymer pectin and synthetic polymer polyvinylpyrrolidone were obtained through casting process. The concentration of glycerol in all formulations was constant (2% v/v), while the amount of polyvinylpyrrolidone varied from 20 to 60% by mass of pectin. The molecular interactions between two components were elucidated by FTIR-ATR spectroscopy, while functional properties of these films were carried out by determination of puncture resistance, tensile strength, thermal stability, water vapor barrier, wettability and printability. The blending of pectin with PVP led to an improvement of mechanical resistance, barrier properties and hydrophobicity of these films for 57%, 58 and 24%, respectively, remaining adequate thermal stability. Since pectin and PVP are nontoxic, food-grade and biodegradable materials, this research present an ecosustainable approach to provide films with satisfied physical properties for use as packaging material of non-food products, such as water-treatment products (detergents, biocides, agrochemical compounds).
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials
EP  - 61
SP  - 56
VL  - 110
DO  - 10.1016/j.compositesb.2016.11.016
ER  - 
@article{
author = "Nešić, Aleksandra and Ružić, Jovana and Gordić, Milan V. and Ostojić, Sanja and Micić, Darko and Onjia, Antonije",
year = "2017",
abstract = "In this work, the new biodegradable blend films composed of natural polymer pectin and synthetic polymer polyvinylpyrrolidone were obtained through casting process. The concentration of glycerol in all formulations was constant (2% v/v), while the amount of polyvinylpyrrolidone varied from 20 to 60% by mass of pectin. The molecular interactions between two components were elucidated by FTIR-ATR spectroscopy, while functional properties of these films were carried out by determination of puncture resistance, tensile strength, thermal stability, water vapor barrier, wettability and printability. The blending of pectin with PVP led to an improvement of mechanical resistance, barrier properties and hydrophobicity of these films for 57%, 58 and 24%, respectively, remaining adequate thermal stability. Since pectin and PVP are nontoxic, food-grade and biodegradable materials, this research present an ecosustainable approach to provide films with satisfied physical properties for use as packaging material of non-food products, such as water-treatment products (detergents, biocides, agrochemical compounds).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials",
pages = "61-56",
volume = "110",
doi = "10.1016/j.compositesb.2016.11.016"
}
Nešić, A., Ružić, J., Gordić, M. V., Ostojić, S., Micić, D.,& Onjia, A.. (2017). Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 110, 56-61.
https://doi.org/10.1016/j.compositesb.2016.11.016
Nešić A, Ružić J, Gordić MV, Ostojić S, Micić D, Onjia A. Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials. in Composites Part B-Engineering. 2017;110:56-61.
doi:10.1016/j.compositesb.2016.11.016 .
Nešić, Aleksandra, Ružić, Jovana, Gordić, Milan V., Ostojić, Sanja, Micić, Darko, Onjia, Antonije, "Pectin-polyvinylpyrrolidone films: A sustainable approach to the development of biobased packaging materials" in Composites Part B-Engineering, 110 (2017):56-61,
https://doi.org/10.1016/j.compositesb.2016.11.016 . .
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Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid

Nešić, Aleksandra; Panić, Vesna; Ostojić, Sanja; Micić, Darko; Pajić-Lijaković, Ivana; Onjia, Antonije; Veličković, Sava

(Elsevier Science Sa, Lausanne, 2016)

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Panić, Vesna
AU  - Ostojić, Sanja
AU  - Micić, Darko
AU  - Pajić-Lijaković, Ivana
AU  - Onjia, Antonije
AU  - Veličković, Sava
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3415
AB  - This article described the synthesis and characterization of new copolymer hydrogels containing two hydrophilic units-methacrylic acid (MAA) and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS). The resulting hydrogels were characterized by various techniques: FTIR, Elemental analysis, SEM, Dynamic Molecular simulation, Dynamic-Mechanical analysis and DSC in order to confirm the structure of hydrogels and to predict the best ratio composition with enhanced physical chemical properties. The swelling behavior in water was studied as a function of ratio of monomers and their concentration in medium. An increase in AMPS content led to expansion of network and increase in swelling degree capacity in water. An increase in AMPS content did not significantly influence the glass transition temperature of copolymers, indicated that the physical properties of initial components were preserved. The equal amount of monomers contributed to the highest strength of hydrogels. Meanwhile, the introduction of AMPS to the system was an effective method for improving the performances of the poly(methacrylic acid)- based hydrogels.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid
EP  - 163
SP  - 156
VL  - 174
DO  - 10.1016/j.matchemphys.2016.02.063
ER  - 
@article{
author = "Nešić, Aleksandra and Panić, Vesna and Ostojić, Sanja and Micić, Darko and Pajić-Lijaković, Ivana and Onjia, Antonije and Veličković, Sava",
year = "2016",
abstract = "This article described the synthesis and characterization of new copolymer hydrogels containing two hydrophilic units-methacrylic acid (MAA) and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS). The resulting hydrogels were characterized by various techniques: FTIR, Elemental analysis, SEM, Dynamic Molecular simulation, Dynamic-Mechanical analysis and DSC in order to confirm the structure of hydrogels and to predict the best ratio composition with enhanced physical chemical properties. The swelling behavior in water was studied as a function of ratio of monomers and their concentration in medium. An increase in AMPS content led to expansion of network and increase in swelling degree capacity in water. An increase in AMPS content did not significantly influence the glass transition temperature of copolymers, indicated that the physical properties of initial components were preserved. The equal amount of monomers contributed to the highest strength of hydrogels. Meanwhile, the introduction of AMPS to the system was an effective method for improving the performances of the poly(methacrylic acid)- based hydrogels.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid",
pages = "163-156",
volume = "174",
doi = "10.1016/j.matchemphys.2016.02.063"
}
Nešić, A., Panić, V., Ostojić, S., Micić, D., Pajić-Lijaković, I., Onjia, A.,& Veličković, S.. (2016). Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 174, 156-163.
https://doi.org/10.1016/j.matchemphys.2016.02.063
Nešić A, Panić V, Ostojić S, Micić D, Pajić-Lijaković I, Onjia A, Veličković S. Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid. in Materials Chemistry and Physics. 2016;174:156-163.
doi:10.1016/j.matchemphys.2016.02.063 .
Nešić, Aleksandra, Panić, Vesna, Ostojić, Sanja, Micić, Darko, Pajić-Lijaković, Ivana, Onjia, Antonije, Veličković, Sava, "Physical-chemical behavior of novel copolymers composed of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid" in Materials Chemistry and Physics, 174 (2016):156-163,
https://doi.org/10.1016/j.matchemphys.2016.02.063 . .
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Novel biosensor films based on chitosan

Nešić, Aleksandra; Onjia, Antonije; Ostojić, Sanja B.; Micić, Darko; Veličković, Sava; Antonović, Dušan

(Elsevier Science Bv, Amsterdam, 2016)

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Onjia, Antonije
AU  - Ostojić, Sanja B.
AU  - Micić, Darko
AU  - Veličković, Sava
AU  - Antonović, Dušan
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3384
AB  - Films of chitosan and poly(itaconic acid) in various different ratios have been prepared by membrane casting. The enhancement in the proton conductivity and uptake of water was observed as the content of poly(itaconic acid) in film increased. The proton conductivity of chitosan/poly(itaconic) films was comparative with commercially used synthetic sensor Nafion 117. Films showed thermal stability up to 185 degrees C. The proposed experiment might open up a new possibility for use of chitosan/poly(itaconic acid) films as a biosensors due to their advantages: low cost, simple preparation and good conductive sensitivity.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - Novel biosensor films based on chitosan
EP  - 49
SP  - 47
VL  - 167
DO  - 10.1016/j.matlet.2015.12.124
ER  - 
@article{
author = "Nešić, Aleksandra and Onjia, Antonije and Ostojić, Sanja B. and Micić, Darko and Veličković, Sava and Antonović, Dušan",
year = "2016",
abstract = "Films of chitosan and poly(itaconic acid) in various different ratios have been prepared by membrane casting. The enhancement in the proton conductivity and uptake of water was observed as the content of poly(itaconic acid) in film increased. The proton conductivity of chitosan/poly(itaconic) films was comparative with commercially used synthetic sensor Nafion 117. Films showed thermal stability up to 185 degrees C. The proposed experiment might open up a new possibility for use of chitosan/poly(itaconic acid) films as a biosensors due to their advantages: low cost, simple preparation and good conductive sensitivity.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "Novel biosensor films based on chitosan",
pages = "49-47",
volume = "167",
doi = "10.1016/j.matlet.2015.12.124"
}
Nešić, A., Onjia, A., Ostojić, S. B., Micić, D., Veličković, S.,& Antonović, D.. (2016). Novel biosensor films based on chitosan. in Materials Letters
Elsevier Science Bv, Amsterdam., 167, 47-49.
https://doi.org/10.1016/j.matlet.2015.12.124
Nešić A, Onjia A, Ostojić SB, Micić D, Veličković S, Antonović D. Novel biosensor films based on chitosan. in Materials Letters. 2016;167:47-49.
doi:10.1016/j.matlet.2015.12.124 .
Nešić, Aleksandra, Onjia, Antonije, Ostojić, Sanja B., Micić, Darko, Veličković, Sava, Antonović, Dušan, "Novel biosensor films based on chitosan" in Materials Letters, 167 (2016):47-49,
https://doi.org/10.1016/j.matlet.2015.12.124 . .
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Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)

Pergal, Marija; Stefanović, Ivan; Gođevac, Dejan; Antić, Vesna; Milačić, Vesna; Ostojić, Sanja; Rogan, Jelena; Đonlagić, Jasna

(Srpsko hemijsko društvo, Beograd, 2014)

TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Gođevac, Dejan
AU  - Antić, Vesna
AU  - Milačić, Vesna
AU  - Ostojić, Sanja
AU  - Rogan, Jelena
AU  - Đonlagić, Jasna
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2692
AB  - In this study, the synthesis, structure and physical properties of two series of thermoplastic polyurethanes based on hydroxypropyl-terminated poly(dimethylsiloxane) (HP-PDMS) or hydroxyethoxypropyl-terminated poly(dimethylsiloxane) (EO-PDMS) as soft segments, and 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol as hard segments were investigated. The polyurethanes were synthesized by two-step polyaddition in solution. The effects of the type and content of PDMS segments on the structure, thermal and surface properties of copolymers were studied by H-1-, C-13-nuclear magnetic resonance (NMR) spectroscopy and two-dimensional NMR spectroscopies (heteronuclear multiple bond correlation (HMBC) and rotating-frame nuclear Overhauser effect (ROESY)), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide-angle X-ray scattering (WAXS), scanning electron microscopy (SEM) and water contact angle and water absorption measurements. Thermal properties investigated by DSC indicated that the presence of soft PDMS segments lowers the glass transition and melting temperatures of the hard phase as well as the degree of crystallinity. SEM analysis of the copolymers with a lower soft segment content confirmed the presence of spherulite superstructures, which arise from the crystallization of the hard segments. When compared with polyurethanes prepared from HP-PDMS, the copolymers synthesized from EO-PDMS with the same content of the soft segments had a higher degree of crystallinity, better thermal stability and a less hydrophobic surface. The obtained results showed that the synthesized polyurethanes had good thermal and surface properties, which could be further modified by changing the type or content of the soft segments.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)
EP  - +
IS  - 7
SP  - 843
VL  - 79
DO  - 10.2298/JSC130819149P
ER  - 
@article{
author = "Pergal, Marija and Stefanović, Ivan and Gođevac, Dejan and Antić, Vesna and Milačić, Vesna and Ostojić, Sanja and Rogan, Jelena and Đonlagić, Jasna",
year = "2014",
abstract = "In this study, the synthesis, structure and physical properties of two series of thermoplastic polyurethanes based on hydroxypropyl-terminated poly(dimethylsiloxane) (HP-PDMS) or hydroxyethoxypropyl-terminated poly(dimethylsiloxane) (EO-PDMS) as soft segments, and 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol as hard segments were investigated. The polyurethanes were synthesized by two-step polyaddition in solution. The effects of the type and content of PDMS segments on the structure, thermal and surface properties of copolymers were studied by H-1-, C-13-nuclear magnetic resonance (NMR) spectroscopy and two-dimensional NMR spectroscopies (heteronuclear multiple bond correlation (HMBC) and rotating-frame nuclear Overhauser effect (ROESY)), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide-angle X-ray scattering (WAXS), scanning electron microscopy (SEM) and water contact angle and water absorption measurements. Thermal properties investigated by DSC indicated that the presence of soft PDMS segments lowers the glass transition and melting temperatures of the hard phase as well as the degree of crystallinity. SEM analysis of the copolymers with a lower soft segment content confirmed the presence of spherulite superstructures, which arise from the crystallization of the hard segments. When compared with polyurethanes prepared from HP-PDMS, the copolymers synthesized from EO-PDMS with the same content of the soft segments had a higher degree of crystallinity, better thermal stability and a less hydrophobic surface. The obtained results showed that the synthesized polyurethanes had good thermal and surface properties, which could be further modified by changing the type or content of the soft segments.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)",
pages = "+-843",
number = "7",
volume = "79",
doi = "10.2298/JSC130819149P"
}
Pergal, M., Stefanović, I., Gođevac, D., Antić, V., Milačić, V., Ostojić, S., Rogan, J.,& Đonlagić, J.. (2014). Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane). in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(7), 843-+.
https://doi.org/10.2298/JSC130819149P
Pergal M, Stefanović I, Gođevac D, Antić V, Milačić V, Ostojić S, Rogan J, Đonlagić J. Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane). in Journal of the Serbian Chemical Society. 2014;79(7):843-+.
doi:10.2298/JSC130819149P .
Pergal, Marija, Stefanović, Ivan, Gođevac, Dejan, Antić, Vesna, Milačić, Vesna, Ostojić, Sanja, Rogan, Jelena, Đonlagić, Jasna, "Structural, thermal and surface characterization of thermoplastic polyurethanes based on poly(dimethylsiloxane)" in Journal of the Serbian Chemical Society, 79, no. 7 (2014):843-+,
https://doi.org/10.2298/JSC130819149P . .
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Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate

Petrusić, Stojanka; Jovančić, Petar; Lewandowski, Maryline; Giraud, Stephane; Grujić, Svetlana; Ostojić, Sanja; Bugarski, Branko; Koncar, Vladan

(Springer, New York, 2013)

TY  - JOUR
AU  - Petrusić, Stojanka
AU  - Jovančić, Petar
AU  - Lewandowski, Maryline
AU  - Giraud, Stephane
AU  - Grujić, Svetlana
AU  - Ostojić, Sanja
AU  - Bugarski, Branko
AU  - Koncar, Vladan
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2384
AB  - This study highlights the advantages of functionalized poly(N-isopropylacrylamide) (PNIPAAm) microgels over pure PNIPAAm microgels in terms of polymer network properties and drug release profiles. PNIPAAm network was modified by addition of maleic anhydride (MA) as a comonomer and by formation of interpenetrating polymer network in the presence of alginate. The functionalized thermosensitive microgels in the size range from 20 to 80 mu m and with better performance in comparison with pure PNIPAAm microgels were prepared by inverse suspension polymerization. The impact of MA and alginate on the PNIPAAm microgel structure was evaluated through analysis of microgel size, size distribution, volume phase transition temperature (VPTT), equilibrium swelling ratio as well as morphology of the system. It was shown that the controlled modification of PNIPAAm network could result in microgels of considerably improved swelling capacity with unchanged thermosensitivity and maintained open pore morphology. In addition, drug release behavior of microgels could be markedly altered. Release of procaine hydrochloride from the selected microgels was studied using Franz diffusion cell at temperatures below and above VPTT of the microgels. Temperature-controlled drug release pattern was dependent on the type of functionalization of PNIPAAm network. According to drug loading properties and drug release mechanism, PNIPAAm/MA copolymer microgels demonstrated the optimal performances.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate
EP  - 7948
IS  - 22
SP  - 7935
VL  - 48
DO  - 10.1007/s10853-013-7604-2
ER  - 
@article{
author = "Petrusić, Stojanka and Jovančić, Petar and Lewandowski, Maryline and Giraud, Stephane and Grujić, Svetlana and Ostojić, Sanja and Bugarski, Branko and Koncar, Vladan",
year = "2013",
abstract = "This study highlights the advantages of functionalized poly(N-isopropylacrylamide) (PNIPAAm) microgels over pure PNIPAAm microgels in terms of polymer network properties and drug release profiles. PNIPAAm network was modified by addition of maleic anhydride (MA) as a comonomer and by formation of interpenetrating polymer network in the presence of alginate. The functionalized thermosensitive microgels in the size range from 20 to 80 mu m and with better performance in comparison with pure PNIPAAm microgels were prepared by inverse suspension polymerization. The impact of MA and alginate on the PNIPAAm microgel structure was evaluated through analysis of microgel size, size distribution, volume phase transition temperature (VPTT), equilibrium swelling ratio as well as morphology of the system. It was shown that the controlled modification of PNIPAAm network could result in microgels of considerably improved swelling capacity with unchanged thermosensitivity and maintained open pore morphology. In addition, drug release behavior of microgels could be markedly altered. Release of procaine hydrochloride from the selected microgels was studied using Franz diffusion cell at temperatures below and above VPTT of the microgels. Temperature-controlled drug release pattern was dependent on the type of functionalization of PNIPAAm network. According to drug loading properties and drug release mechanism, PNIPAAm/MA copolymer microgels demonstrated the optimal performances.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate",
pages = "7948-7935",
number = "22",
volume = "48",
doi = "10.1007/s10853-013-7604-2"
}
Petrusić, S., Jovančić, P., Lewandowski, M., Giraud, S., Grujić, S., Ostojić, S., Bugarski, B.,& Koncar, V.. (2013). Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate. in Journal of Materials Science
Springer, New York., 48(22), 7935-7948.
https://doi.org/10.1007/s10853-013-7604-2
Petrusić S, Jovančić P, Lewandowski M, Giraud S, Grujić S, Ostojić S, Bugarski B, Koncar V. Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate. in Journal of Materials Science. 2013;48(22):7935-7948.
doi:10.1007/s10853-013-7604-2 .
Petrusić, Stojanka, Jovančić, Petar, Lewandowski, Maryline, Giraud, Stephane, Grujić, Svetlana, Ostojić, Sanja, Bugarski, Branko, Koncar, Vladan, "Properties and drug release profile of poly(N-isopropylacrylamide) microgels functionalized with maleic anhydride and alginate" in Journal of Materials Science, 48, no. 22 (2013):7935-7948,
https://doi.org/10.1007/s10853-013-7604-2 . .
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Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate

Petrusić, Stojanka; Lewandowski, Maryline; Giraud, Stephane; Jovančić, Petar; Bugarski, Branko; Ostojić, Sanja; Koncar, Vladan

(Wiley, Hoboken, 2012)

TY  - JOUR
AU  - Petrusić, Stojanka
AU  - Lewandowski, Maryline
AU  - Giraud, Stephane
AU  - Jovančić, Petar
AU  - Bugarski, Branko
AU  - Ostojić, Sanja
AU  - Koncar, Vladan
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2230
AB  - This work refers to the synthesis and characterization of thermosensitive hydrogels based on interpenetrating polymer networks (IPNs) of poly(N-isopropylacrylamide) (PNIPAAm) and calcium alginate in the form of films. The influence of the crosslinking degree of PNIPAAm and alginate content on thermal, swelling, mechanical, and morphological properties of hydrogels is investigated in detail. Characterization of pure PNIPAAm hydrogels and IPN hydrogels was performed by FTIR, DSC, DMA, and SEM. In addition, the studies of equilibrium swelling behavior as well as swelling, deswelling, and reswelling kinetics are performed. The results obtained imply the benefits of synthesizing IPNs based on PNIPAAm and calcium alginate over pure PNIPAAm hydrogels. The presence of calcium alginate contributes to the improvement of mechanical properties, the deswelling rate of hydrogels, and the network porosity, without altering the thermosensitivity of PNIPAAm significantly.
PB  - Wiley, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate
EP  - 903
IS  - 2
SP  - 890
VL  - 124
DO  - 10.1002/app.35122
ER  - 
@article{
author = "Petrusić, Stojanka and Lewandowski, Maryline and Giraud, Stephane and Jovančić, Petar and Bugarski, Branko and Ostojić, Sanja and Koncar, Vladan",
year = "2012",
abstract = "This work refers to the synthesis and characterization of thermosensitive hydrogels based on interpenetrating polymer networks (IPNs) of poly(N-isopropylacrylamide) (PNIPAAm) and calcium alginate in the form of films. The influence of the crosslinking degree of PNIPAAm and alginate content on thermal, swelling, mechanical, and morphological properties of hydrogels is investigated in detail. Characterization of pure PNIPAAm hydrogels and IPN hydrogels was performed by FTIR, DSC, DMA, and SEM. In addition, the studies of equilibrium swelling behavior as well as swelling, deswelling, and reswelling kinetics are performed. The results obtained imply the benefits of synthesizing IPNs based on PNIPAAm and calcium alginate over pure PNIPAAm hydrogels. The presence of calcium alginate contributes to the improvement of mechanical properties, the deswelling rate of hydrogels, and the network porosity, without altering the thermosensitivity of PNIPAAm significantly.",
publisher = "Wiley, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate",
pages = "903-890",
number = "2",
volume = "124",
doi = "10.1002/app.35122"
}
Petrusić, S., Lewandowski, M., Giraud, S., Jovančić, P., Bugarski, B., Ostojić, S.,& Koncar, V.. (2012). Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate. in Journal of Applied Polymer Science
Wiley, Hoboken., 124(2), 890-903.
https://doi.org/10.1002/app.35122
Petrusić S, Lewandowski M, Giraud S, Jovančić P, Bugarski B, Ostojić S, Koncar V. Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate. in Journal of Applied Polymer Science. 2012;124(2):890-903.
doi:10.1002/app.35122 .
Petrusić, Stojanka, Lewandowski, Maryline, Giraud, Stephane, Jovančić, Petar, Bugarski, Branko, Ostojić, Sanja, Koncar, Vladan, "Development and characterization of thermosensitive hydrogels based on poly(N-isopropylacrylamide) and calcium alginate" in Journal of Applied Polymer Science, 124, no. 2 (2012):890-903,
https://doi.org/10.1002/app.35122 . .
35
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34

Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters

Džunuzović, Jasna; Pergal, Marija; Poreba, Rafal; Ostojić, Sanja; Lazić, Nada; Spirkova, Milena; Jovanovic, Slobodan

(American Chemical Society (ACS), 2012)

TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Pergal, Marija
AU  - Poreba, Rafal
AU  - Ostojić, Sanja
AU  - Lazić, Nada
AU  - Spirkova, Milena
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5740
AB  - Polyurethane networks based on Boltorn hyperbranched polyesters (HBPs) of different pseudogenerations as cross-linkers, alpha,omega-dihydroxy(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate were synthesized using a two-step polymerization reaction in solution. The influence of the pseudogeneration number of Boltorn HBPs on the thermomechanical and thermal properties and morphologies of polyurethane networks was investigated using FTIR, DMTA, TGA, hardness measurements, SEM, and SAXS. Synthesized polyurethanes showed higher cross-linking density and hardness and lower thermal stability with increasing pseudogeneration number of HBP. Samples with lower EO-PDMS-EO content exhibited slightly better thermal stability and higher hardness. All utilized characterization methods yielded consistent results and confirmed the existence of microphase separated morphology with the appearance of certain microphase mixing between segments as the pseudogeneration number of HBP increased. The obtained results revealed that the synthesized polyurethanes have good thermal and thermomechanical properties, which can be tailored by changing the pseudogeneration number of the HBP or the EO-PDMS-EO content.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters
EP  - 10832
IS  - 33
SP  - 10824
VL  - 51
DO  - 10.1021/ie300927z
ER  - 
@article{
author = "Džunuzović, Jasna and Pergal, Marija and Poreba, Rafal and Ostojić, Sanja and Lazić, Nada and Spirkova, Milena and Jovanovic, Slobodan",
year = "2012",
abstract = "Polyurethane networks based on Boltorn hyperbranched polyesters (HBPs) of different pseudogenerations as cross-linkers, alpha,omega-dihydroxy(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate were synthesized using a two-step polymerization reaction in solution. The influence of the pseudogeneration number of Boltorn HBPs on the thermomechanical and thermal properties and morphologies of polyurethane networks was investigated using FTIR, DMTA, TGA, hardness measurements, SEM, and SAXS. Synthesized polyurethanes showed higher cross-linking density and hardness and lower thermal stability with increasing pseudogeneration number of HBP. Samples with lower EO-PDMS-EO content exhibited slightly better thermal stability and higher hardness. All utilized characterization methods yielded consistent results and confirmed the existence of microphase separated morphology with the appearance of certain microphase mixing between segments as the pseudogeneration number of HBP increased. The obtained results revealed that the synthesized polyurethanes have good thermal and thermomechanical properties, which can be tailored by changing the pseudogeneration number of the HBP or the EO-PDMS-EO content.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters",
pages = "10832-10824",
number = "33",
volume = "51",
doi = "10.1021/ie300927z"
}
Džunuzović, J., Pergal, M., Poreba, R., Ostojić, S., Lazić, N., Spirkova, M.,& Jovanovic, S.. (2012). Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 51(33), 10824-10832.
https://doi.org/10.1021/ie300927z
Džunuzović J, Pergal M, Poreba R, Ostojić S, Lazić N, Spirkova M, Jovanovic S. Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters. in Industrial and Engineering Chemistry Research. 2012;51(33):10824-10832.
doi:10.1021/ie300927z .
Džunuzović, Jasna, Pergal, Marija, Poreba, Rafal, Ostojić, Sanja, Lazić, Nada, Spirkova, Milena, Jovanovic, Slobodan, "Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters" in Industrial and Engineering Chemistry Research, 51, no. 33 (2012):10824-10832,
https://doi.org/10.1021/ie300927z . .
13
13
18

Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments

Pergal, Marija; Antić, Vesna; Govedarica, Milutin; Gođevac, Dejan; Ostojić, Sanja; Đonlagić, Jasna

(Wiley-Blackwell, Malden, 2011)

TY  - JOUR
AU  - Pergal, Marija
AU  - Antić, Vesna
AU  - Govedarica, Milutin
AU  - Gođevac, Dejan
AU  - Ostojić, Sanja
AU  - Đonlagić, Jasna
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5658
AB  - Novel polyurethane copolymers derived from 4,4'-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BD) and alpha, omega-dihydroxy-[poly(caprolactone)-poly (dimethylsiloxane)-poly(caprolactone)] (a, x-dihydroxy( PCL-PDMS-PCL); (M) over bar (n) 6100 g mol(-1)) were synthesized by a two-step polyaddition reaction in solution. In the synthesis of the polyurethanes, the PCL blocks served as a compatibilizer between the nonpolar PDMS blocks and the polar comonomers, MDI and BD. The synthesis of thermoplastic polyurethanes (TPU) with high soft segment contents was optimized in terms of the concentrations of the reactants, the molar ratio of the NCO/OH groups, and the time and temperature of the polyaddition reaction. The structure, composition, and hard MDI/BD segment length of the synthesized polyurethane copolymers were determined by H-1, C-13-NMR, and two-dimensional correlation (COSY, HSQC, and HMBC) spectroscopy, while the hydrogen bonding interactions in the copolymers were analyzed by FT-IR spectroscopy. The influence of the reaction conditions on the structure, molecular weight, thermal, and some physical properties was studied at constant composition of the reaction mixture. A change in the molar ratio of the NCO/OH groups and the reaction conditions modified not only the molecular weight of the synthesized polyurethanes, but also the microstructure and therefore the thermal and physical properties of the copolymers. It was demonstrated that only PCL segments with high soft segment contents crystallize, thereby showing spherulitic morphology.
PB  - Wiley-Blackwell, Malden
T2  - Journal of Applied Polymer Science
T1  - Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments
EP  - 2730
IS  - 4
SP  - 2715
VL  - 122
DO  - 10.1002/app.33926
ER  - 
@article{
author = "Pergal, Marija and Antić, Vesna and Govedarica, Milutin and Gođevac, Dejan and Ostojić, Sanja and Đonlagić, Jasna",
year = "2011",
abstract = "Novel polyurethane copolymers derived from 4,4'-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BD) and alpha, omega-dihydroxy-[poly(caprolactone)-poly (dimethylsiloxane)-poly(caprolactone)] (a, x-dihydroxy( PCL-PDMS-PCL); (M) over bar (n) 6100 g mol(-1)) were synthesized by a two-step polyaddition reaction in solution. In the synthesis of the polyurethanes, the PCL blocks served as a compatibilizer between the nonpolar PDMS blocks and the polar comonomers, MDI and BD. The synthesis of thermoplastic polyurethanes (TPU) with high soft segment contents was optimized in terms of the concentrations of the reactants, the molar ratio of the NCO/OH groups, and the time and temperature of the polyaddition reaction. The structure, composition, and hard MDI/BD segment length of the synthesized polyurethane copolymers were determined by H-1, C-13-NMR, and two-dimensional correlation (COSY, HSQC, and HMBC) spectroscopy, while the hydrogen bonding interactions in the copolymers were analyzed by FT-IR spectroscopy. The influence of the reaction conditions on the structure, molecular weight, thermal, and some physical properties was studied at constant composition of the reaction mixture. A change in the molar ratio of the NCO/OH groups and the reaction conditions modified not only the molecular weight of the synthesized polyurethanes, but also the microstructure and therefore the thermal and physical properties of the copolymers. It was demonstrated that only PCL segments with high soft segment contents crystallize, thereby showing spherulitic morphology.",
publisher = "Wiley-Blackwell, Malden",
journal = "Journal of Applied Polymer Science",
title = "Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments",
pages = "2730-2715",
number = "4",
volume = "122",
doi = "10.1002/app.33926"
}
Pergal, M., Antić, V., Govedarica, M., Gođevac, D., Ostojić, S.,& Đonlagić, J.. (2011). Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments. in Journal of Applied Polymer Science
Wiley-Blackwell, Malden., 122(4), 2715-2730.
https://doi.org/10.1002/app.33926
Pergal M, Antić V, Govedarica M, Gođevac D, Ostojić S, Đonlagić J. Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments. in Journal of Applied Polymer Science. 2011;122(4):2715-2730.
doi:10.1002/app.33926 .
Pergal, Marija, Antić, Vesna, Govedarica, Milutin, Gođevac, Dejan, Ostojić, Sanja, Đonlagić, Jasna, "Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments" in Journal of Applied Polymer Science, 122, no. 4 (2011):2715-2730,
https://doi.org/10.1002/app.33926 . .
3
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