TY  - JOUR
AU  - Elmadani, A. A.
AU  - Radović, Ivana M.
AU  - Tomić, Nataša Z.
AU  - Petrović, Miloš M.
AU  - Stojanović, Dušica B.
AU  - Jančić-Heinemann, Radmila
AU  - Radojević, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8748
AB  - The processing and characterization of hybrid PMMA resin composites with nano-zirconia (ZrO2) and electrospun polystyrene (PS) polymer fibers were presented in this study. Reinforcement was selected with the intention to tune the physical and mechanical properties of the hybrid composite. Surface modification of inorganic particles was performed in order to improve the adhesion of reinforcement to the matrix. Fourier transform infrared spectroscopy (FTIR) provided successful modification of zirconia nanoparticles with 3-Methacryloxypropyltrimethoxysilane (MEMO) and bonding improvement between incompatible inorganic nanoparticles and PMMA matrix. Considerable deagglomeration of nanoparticles in the matrix occurred after the modification has been revealed by scanning electron microscopy (SEM). Microhardness increased with the concentration of modified nanoparticles, while the fibers were the modifier that lowers hardness and promotes toughness of hybrid composites. Impact test displayed increased absorbed energy after the PS electrospun fibers had been embedded. The optimized composition of the hybrid was determined and a good balance of thermal and mechanical properties was achieved. © 2019 Elmadani et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
T2  - PLOS One
T1  - Hybrid denture acrylic composites with nanozirconia and electrospun polystyrene fibers
VL  - 14
IS  - 12
SP  - e0226528
DO  - 10.1371/journal.pone.0226528
ER  - 

@article{
author = "Elmadani, A. A. and Radović, Ivana M. and Tomić, Nataša Z. and Petrović, Miloš M. and Stojanović, Dušica B. and Jančić-Heinemann, Radmila and Radojević, Vesna",
year = "2019",
abstract = "The processing and characterization of hybrid PMMA resin composites with nano-zirconia (ZrO2) and electrospun polystyrene (PS) polymer fibers were presented in this study. Reinforcement was selected with the intention to tune the physical and mechanical properties of the hybrid composite. Surface modification of inorganic particles was performed in order to improve the adhesion of reinforcement to the matrix. Fourier transform infrared spectroscopy (FTIR) provided successful modification of zirconia nanoparticles with 3-Methacryloxypropyltrimethoxysilane (MEMO) and bonding improvement between incompatible inorganic nanoparticles and PMMA matrix. Considerable deagglomeration of nanoparticles in the matrix occurred after the modification has been revealed by scanning electron microscopy (SEM). Microhardness increased with the concentration of modified nanoparticles, while the fibers were the modifier that lowers hardness and promotes toughness of hybrid composites. Impact test displayed increased absorbed energy after the PS electrospun fibers had been embedded. The optimized composition of the hybrid was determined and a good balance of thermal and mechanical properties was achieved. © 2019 Elmadani et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.",
journal = "PLOS One",
title = "Hybrid denture acrylic composites with nanozirconia and electrospun polystyrene fibers",
volume = "14",
number = "12",
pages = "e0226528",
doi = "10.1371/journal.pone.0226528"
}

Elmadani, A. A., Radović, I. M., Tomić, N. Z., Petrović, M. M., Stojanović, D. B., Jančić-Heinemann, R.,& Radojević, V.. (2019). Hybrid denture acrylic composites with nanozirconia and electrospun polystyrene fibers. in PLOS One, 14(12), e0226528.
https://doi.org/10.1371/journal.pone.0226528

Elmadani AA, Radović IM, Tomić NZ, Petrović MM, Stojanović DB, Jančić-Heinemann R, Radojević V. Hybrid denture acrylic composites with nanozirconia and electrospun polystyrene fibers. in PLOS One. 2019;14(12):e0226528.
doi:10.1371/journal.pone.0226528 .

Elmadani, A. A., Radović, Ivana M., Tomić, Nataša Z., Petrović, Miloš M., Stojanović, Dušica B., Jančić-Heinemann, Radmila, Radojević, Vesna, "Hybrid denture acrylic composites with nanozirconia and electrospun polystyrene fibers" in PLOS One, 14, no. 12 (2019):e0226528,
https://doi.org/10.1371/journal.pone.0226528 . .

TY  - JOUR
AU  - Elmadani, A. A.
AU  - Tomić, Nataša Z.
AU  - Radović, Ivana M.
AU  - Vuksanović, Marija M.
AU  - Stojanović, Dušica B.
AU  - Jančić-Heinemann, Radmila
AU  - Radojević, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8793
AB  - To obtain flakes like zirconia particles at relatively low temperature, the synthesis method for producing zirconia particles on the surface of salt particles that serve as a template is examined. The produced particles are incorporated as reinforcement in the poly(methyl methacrylate) matrix to obtain a composite material. The particles were characterized by the X-ray diffraction, Fourier-transform infrared spectroscopy, and image analysis. The morphology of the particles and composites was examined using a field emission scanning electron microscope. Composites prepared with synthesized particles were compared to those containing commercial zirconia particles to estimate the possibility of use of synthesized particles as reinforcement. The influence of the 1 wt% of zirconia particles in composite material on the mechanical properties was studied using microhardness measurements and dynamic mechanical analysis. The results obtained show that the addition of 1 wt% of zirconia particles increases the mechanical properties of the composite relative to the pure polymer matrix.
T2  - Advanced Composites Letters
T1  - Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite
VL  - 28
SP  - 096369351987969
DO  - 10.1177/0963693519879696
ER  - 

@article{
author = "Elmadani, A. A. and Tomić, Nataša Z. and Radović, Ivana M. and Vuksanović, Marija M. and Stojanović, Dušica B. and Jančić-Heinemann, Radmila and Radojević, Vesna",
year = "2019",
abstract = "To obtain flakes like zirconia particles at relatively low temperature, the synthesis method for producing zirconia particles on the surface of salt particles that serve as a template is examined. The produced particles are incorporated as reinforcement in the poly(methyl methacrylate) matrix to obtain a composite material. The particles were characterized by the X-ray diffraction, Fourier-transform infrared spectroscopy, and image analysis. The morphology of the particles and composites was examined using a field emission scanning electron microscope. Composites prepared with synthesized particles were compared to those containing commercial zirconia particles to estimate the possibility of use of synthesized particles as reinforcement. The influence of the 1 wt% of zirconia particles in composite material on the mechanical properties was studied using microhardness measurements and dynamic mechanical analysis. The results obtained show that the addition of 1 wt% of zirconia particles increases the mechanical properties of the composite relative to the pure polymer matrix.",
journal = "Advanced Composites Letters",
title = "Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite",
volume = "28",
pages = "096369351987969",
doi = "10.1177/0963693519879696"
}

Elmadani, A. A., Tomić, N. Z., Radović, I. M., Vuksanović, M. M., Stojanović, D. B., Jančić-Heinemann, R.,& Radojević, V.. (2019). Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite. in Advanced Composites Letters, 28, 096369351987969.
https://doi.org/10.1177/0963693519879696

Elmadani AA, Tomić NZ, Radović IM, Vuksanović MM, Stojanović DB, Jančić-Heinemann R, Radojević V. Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite. in Advanced Composites Letters. 2019;28:096369351987969.
doi:10.1177/0963693519879696 .

Elmadani, A. A., Tomić, Nataša Z., Radović, Ivana M., Vuksanović, Marija M., Stojanović, Dušica B., Jančić-Heinemann, Radmila, Radojević, Vesna, "Salt template zirconia reinforcing particles as possible reinforcement for PMMA matrix composite" in Advanced Composites Letters, 28 (2019):096369351987969,
https://doi.org/10.1177/0963693519879696 . .

TY  - JOUR
AU  - Milanović, Predrag
AU  - Vuksanović, Marija M.
AU  - Mitrić, Miodrag
AU  - Stojanović, Dušica B.
AU  - Kojović, Aleksandar
AU  - Rogan, Jelena R.
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7667
AB  - It is well known that alumina possesses good mechanical and chemical properties. Nanofibers having alpha - alumina structure was used as reinforcement for metal, polymer and ceramic matrix composites. In this study, three series of nanofibers were prepared. The first series was made from 10 % water solution of the aluminium chloride hydroxide/polyvinyl alcohol with a mass ratio of 5: 1. The other two series were made with the addition of 1 wt.% of MgCl2 or 1 wt.% of FeCl3 regarding the aluminium chloride hydroxide content. Nanofibers were prepared using the electrospinning technique and they were characterized by the TGA/DTA, XRD and FESEM methods. It was proven that addition of FeCl3 into the initial spinning solution lowers the temperature for the corundum structure formation while the addition of MgCl2 results if the formation of mixed oxides that eases the sintering process.
T2  - Science of Sintering
T1  - Electrospun alumina fibers doped with ferric and magnesium oxides
VL  - 50
IS  - 1
SP  - 77
EP  - 83
DO  - 10.2298/SOS1801077M
ER  - 

@article{
author = "Milanović, Predrag and Vuksanović, Marija M. and Mitrić, Miodrag and Stojanović, Dušica B. and Kojović, Aleksandar and Rogan, Jelena R. and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "It is well known that alumina possesses good mechanical and chemical properties. Nanofibers having alpha - alumina structure was used as reinforcement for metal, polymer and ceramic matrix composites. In this study, three series of nanofibers were prepared. The first series was made from 10 % water solution of the aluminium chloride hydroxide/polyvinyl alcohol with a mass ratio of 5: 1. The other two series were made with the addition of 1 wt.% of MgCl2 or 1 wt.% of FeCl3 regarding the aluminium chloride hydroxide content. Nanofibers were prepared using the electrospinning technique and they were characterized by the TGA/DTA, XRD and FESEM methods. It was proven that addition of FeCl3 into the initial spinning solution lowers the temperature for the corundum structure formation while the addition of MgCl2 results if the formation of mixed oxides that eases the sintering process.",
journal = "Science of Sintering",
title = "Electrospun alumina fibers doped with ferric and magnesium oxides",
volume = "50",
number = "1",
pages = "77-83",
doi = "10.2298/SOS1801077M"
}

Milanović, P., Vuksanović, M. M., Mitrić, M., Stojanović, D. B., Kojović, A., Rogan, J. R.,& Jančić-Heinemann, R.. (2018). Electrospun alumina fibers doped with ferric and magnesium oxides. in Science of Sintering, 50(1), 77-83.
https://doi.org/10.2298/SOS1801077M

Milanović P, Vuksanović MM, Mitrić M, Stojanović DB, Kojović A, Rogan JR, Jančić-Heinemann R. Electrospun alumina fibers doped with ferric and magnesium oxides. in Science of Sintering. 2018;50(1):77-83.
doi:10.2298/SOS1801077M .

Milanović, Predrag, Vuksanović, Marija M., Mitrić, Miodrag, Stojanović, Dušica B., Kojović, Aleksandar, Rogan, Jelena R., Jančić-Heinemann, Radmila, "Electrospun alumina fibers doped with ferric and magnesium oxides" in Science of Sintering, 50, no. 1 (2018):77-83,
https://doi.org/10.2298/SOS1801077M . .

TY  - JOUR
AU  - Mijailović, Daniel M.
AU  - Vukčević, Marija M.
AU  - Stević, Zoran M.
AU  - Kalijadis, Ana
AU  - Stojanović, Dušica B.
AU  - Panić, Vladimir V.
AU  - Uskoković, Petar S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1583
AB  - Activated carbons with high specific surface area (even above 2000 m(2) g(-1)) and pronounced microporosity are prepared in two-stage process involving conventional carbonization of waste hemp fibers and subsequent activation by potassium hydroxide. Samples with considerably different surface and intrinsic micro-and mesoporous properties are obtained at different carbonization and activation conditions. The improvements of the capacitive properties are found upon increase in carbonization temperature, since it considerably influenced the specific surface area and the content of surface oxygen groups. Cyclic voltammetry experiments reveal the dependence of specific capacitance on the sweep rate due to the characteristic porous structure of the samples. The highest measured value in 1 M H2SO4 solution is 122 F g(-1). The electrochemical impedance data indicates eight-branch transmission line equivalent electric behavior of activated carbons. (C) 2017 The Electrochemical Society. All rights reserved.
T2  - Journal of the Electrochemical Society
T1  - Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers
VL  - 164
IS  - 6
SP  - A1061
EP  - A1068
DO  - 10.1149/2.0581706jes
ER  - 

@article{
author = "Mijailović, Daniel M. and Vukčević, Marija M. and Stević, Zoran M. and Kalijadis, Ana and Stojanović, Dušica B. and Panić, Vladimir V. and Uskoković, Petar S.",
year = "2017",
abstract = "Activated carbons with high specific surface area (even above 2000 m(2) g(-1)) and pronounced microporosity are prepared in two-stage process involving conventional carbonization of waste hemp fibers and subsequent activation by potassium hydroxide. Samples with considerably different surface and intrinsic micro-and mesoporous properties are obtained at different carbonization and activation conditions. The improvements of the capacitive properties are found upon increase in carbonization temperature, since it considerably influenced the specific surface area and the content of surface oxygen groups. Cyclic voltammetry experiments reveal the dependence of specific capacitance on the sweep rate due to the characteristic porous structure of the samples. The highest measured value in 1 M H2SO4 solution is 122 F g(-1). The electrochemical impedance data indicates eight-branch transmission line equivalent electric behavior of activated carbons. (C) 2017 The Electrochemical Society. All rights reserved.",
journal = "Journal of the Electrochemical Society",
title = "Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers",
volume = "164",
number = "6",
pages = "A1061-A1068",
doi = "10.1149/2.0581706jes"
}

Mijailović, D. M., Vukčević, M. M., Stević, Z. M., Kalijadis, A., Stojanović, D. B., Panić, V. V.,& Uskoković, P. S.. (2017). Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers. in Journal of the Electrochemical Society, 164(6), A1061-A1068.
https://doi.org/10.1149/2.0581706jes

Mijailović DM, Vukčević MM, Stević ZM, Kalijadis A, Stojanović DB, Panić VV, Uskoković PS. Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers. in Journal of the Electrochemical Society. 2017;164(6):A1061-A1068.
doi:10.1149/2.0581706jes .

Mijailović, Daniel M., Vukčević, Marija M., Stević, Zoran M., Kalijadis, Ana, Stojanović, Dušica B., Panić, Vladimir V., Uskoković, Petar S., "Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers" in Journal of the Electrochemical Society, 164, no. 6 (2017):A1061-A1068,
https://doi.org/10.1149/2.0581706jes . .

TY  - JOUR
AU  - Alzarrug, Faisal Ali
AU  - Stojanović, Dušica B.
AU  - Obradović, Vera
AU  - Kojović, Aleksandar
AU  - Nedeljković, Jovan
AU  - Rajilić-Stojanović, Mirjana
AU  - Uskoković, Petar S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1598
AB  - Titania nanofillers were used to reinforce nanofibers in composite mats produced by electrospinning of poly(vinyl butyral) with two different concentrations of polymers. The titania nanoparticles and titania nanotubes were added into an acetic acid/ethanol solution in different contents of 3 and 1wt%, respectively. The effect of the processing system on the morphology of the produced fibers was analyzed. The antimicrobial poly(vinyl butyral) composite fibers with titanium dioxide nanoparticles and titanium dioxide nanotubes were produced by single and multineedle electrospinning systems. This study reports fabrication of composite nanofibrous mats with significant mechanical and antimicrobial properties at a high production speed, which is promising for commercial applications (health care, photocatalysis, protective clothing, etc.). The reported result revealed an outstanding correlation between values of elastic modulus derived from nanoindentation and dynamic mechanical techniques. Copyright (c) 2017 John Wiley and Sons, Ltd.
T2  - Polymers for Advanced Technologies
T1  - Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites
VL  - 28
IS  - 7
SP  - 909
EP  - 914
DO  - 10.1002/pat.3996
ER  - 

@article{
author = "Alzarrug, Faisal Ali and Stojanović, Dušica B. and Obradović, Vera and Kojović, Aleksandar and Nedeljković, Jovan and Rajilić-Stojanović, Mirjana and Uskoković, Petar S.",
year = "2017",
abstract = "Titania nanofillers were used to reinforce nanofibers in composite mats produced by electrospinning of poly(vinyl butyral) with two different concentrations of polymers. The titania nanoparticles and titania nanotubes were added into an acetic acid/ethanol solution in different contents of 3 and 1wt%, respectively. The effect of the processing system on the morphology of the produced fibers was analyzed. The antimicrobial poly(vinyl butyral) composite fibers with titanium dioxide nanoparticles and titanium dioxide nanotubes were produced by single and multineedle electrospinning systems. This study reports fabrication of composite nanofibrous mats with significant mechanical and antimicrobial properties at a high production speed, which is promising for commercial applications (health care, photocatalysis, protective clothing, etc.). The reported result revealed an outstanding correlation between values of elastic modulus derived from nanoindentation and dynamic mechanical techniques. Copyright (c) 2017 John Wiley and Sons, Ltd.",
journal = "Polymers for Advanced Technologies",
title = "Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites",
volume = "28",
number = "7",
pages = "909-914",
doi = "10.1002/pat.3996"
}

Alzarrug, F. A., Stojanović, D. B., Obradović, V., Kojović, A., Nedeljković, J., Rajilić-Stojanović, M.,& Uskoković, P. S.. (2017). Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites. in Polymers for Advanced Technologies, 28(7), 909-914.
https://doi.org/10.1002/pat.3996

Alzarrug FA, Stojanović DB, Obradović V, Kojović A, Nedeljković J, Rajilić-Stojanović M, Uskoković PS. Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites. in Polymers for Advanced Technologies. 2017;28(7):909-914.
doi:10.1002/pat.3996 .

Alzarrug, Faisal Ali, Stojanović, Dušica B., Obradović, Vera, Kojović, Aleksandar, Nedeljković, Jovan, Rajilić-Stojanović, Mirjana, Uskoković, Petar S., "Multiscale characterization of antimicrobial poly(vinyl butyral)/titania nanofibrous composites" in Polymers for Advanced Technologies, 28, no. 7 (2017):909-914,
https://doi.org/10.1002/pat.3996 . .

TY  - JOUR
AU  - Brajovic, Ljiljana M.
AU  - Stojanović, Dušica B.
AU  - Mihailovic, Pedja
AU  - Marković, Smilja
AU  - Romčević, Maja J.
AU  - Mitrić, Miodrag
AU  - Lazović, Vladimir M.
AU  - Dramlić, Dragan M.
AU  - Petričević, Slobodan
AU  - Romčević, Nebojša Ž.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1380
AB  - Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Preparation and characterization of bismuth germanium oxide (BGO) polymer composites
VL  - 695
SP  - 841
EP  - 849
DO  - 10.1016/j.jallcom.2016.10.140
ER  - 

@article{
author = "Brajovic, Ljiljana M. and Stojanović, Dušica B. and Mihailovic, Pedja and Marković, Smilja and Romčević, Maja J. and Mitrić, Miodrag and Lazović, Vladimir M. and Dramlić, Dragan M. and Petričević, Slobodan and Romčević, Nebojša Ž.",
year = "2017",
abstract = "Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites",
volume = "695",
pages = "841-849",
doi = "10.1016/j.jallcom.2016.10.140"
}

Brajovic, L. M., Stojanović, D. B., Mihailovic, P., Marković, S., Romčević, M. J., Mitrić, M., Lazović, V. M., Dramlić, D. M., Petričević, S.,& Romčević, N. Ž.. (2017). Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds, 695, 841-849.
https://doi.org/10.1016/j.jallcom.2016.10.140

Brajovic LM, Stojanović DB, Mihailovic P, Marković S, Romčević MJ, Mitrić M, Lazović VM, Dramlić DM, Petričević S, Romčević NŽ. Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds. 2017;695:841-849.
doi:10.1016/j.jallcom.2016.10.140 .

Brajovic, Ljiljana M., Stojanović, Dušica B., Mihailovic, Pedja, Marković, Smilja, Romčević, Maja J., Mitrić, Miodrag, Lazović, Vladimir M., Dramlić, Dragan M., Petričević, Slobodan, Romčević, Nebojša Ž., "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites" in Journal of Alloys and Compounds, 695 (2017):841-849,
https://doi.org/10.1016/j.jallcom.2016.10.140 . .

TY  - JOUR
AU  - Musbah, Salah S.
AU  - Radojević, Vesna
AU  - Borna, Nadezda V.
AU  - Stojanović, Dušica B.
AU  - Dramićanin, Miroslav
AU  - Marinković, Aleksandar D.
AU  - Aleksić, Radoslav R.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4476
AB  - The results of a study related to the processing and characterization of poly(methyl methacrylate) (PMMA)-Y2O3 (Eu3+) nanocomposites are presented herein. The nanocomposite samples were prepared using a laboratory mixing molder with different contents of Eu-ion doped Y2O3 nanophosphor powder. The influence of particle content on the optical and dynamic mechanical properties of the nanocomposites was investigated. The intensity of the luminescence emission spectra increased as the nanophosphor content in the composite increased. The results of dynamic mechanical analysis revealed that the storage modulus, loss modulus and glass transition temperature (T-g) of the polymer composites increased with increasing content of the nanophosphor powder. The microhardness data also confirmed that the hardness number increased with nanoparticles concentration in the PMMA nanocomposites. The obtained results revealed a relatively linear relationship between T-g and the Vickers hardness.
T2  - Journal of the Serbian Chemical Society
T1  - PMMA-Y2O3 (Eu3+) nanocomposites: optical and mechanical properties
VL  - 76
IS  - 8
SP  - 1153
EP  - 1161
DO  - 10.2298/JSC100330094M
ER  - 

@article{
author = "Musbah, Salah S. and Radojević, Vesna and Borna, Nadezda V. and Stojanović, Dušica B. and Dramićanin, Miroslav and Marinković, Aleksandar D. and Aleksić, Radoslav R.",
year = "2011",
abstract = "The results of a study related to the processing and characterization of poly(methyl methacrylate) (PMMA)-Y2O3 (Eu3+) nanocomposites are presented herein. The nanocomposite samples were prepared using a laboratory mixing molder with different contents of Eu-ion doped Y2O3 nanophosphor powder. The influence of particle content on the optical and dynamic mechanical properties of the nanocomposites was investigated. The intensity of the luminescence emission spectra increased as the nanophosphor content in the composite increased. The results of dynamic mechanical analysis revealed that the storage modulus, loss modulus and glass transition temperature (T-g) of the polymer composites increased with increasing content of the nanophosphor powder. The microhardness data also confirmed that the hardness number increased with nanoparticles concentration in the PMMA nanocomposites. The obtained results revealed a relatively linear relationship between T-g and the Vickers hardness.",
journal = "Journal of the Serbian Chemical Society",
title = "PMMA-Y2O3 (Eu3+) nanocomposites: optical and mechanical properties",
volume = "76",
number = "8",
pages = "1153-1161",
doi = "10.2298/JSC100330094M"
}

Musbah, S. S., Radojević, V., Borna, N. V., Stojanović, D. B., Dramićanin, M., Marinković, A. D.,& Aleksić, R. R.. (2011). PMMA-Y2O3 (Eu3+) nanocomposites: optical and mechanical properties. in Journal of the Serbian Chemical Society, 76(8), 1153-1161.
https://doi.org/10.2298/JSC100330094M

Musbah SS, Radojević V, Borna NV, Stojanović DB, Dramićanin M, Marinković AD, Aleksić RR. PMMA-Y2O3 (Eu3+) nanocomposites: optical and mechanical properties. in Journal of the Serbian Chemical Society. 2011;76(8):1153-1161.
doi:10.2298/JSC100330094M .

Musbah, Salah S., Radojević, Vesna, Borna, Nadezda V., Stojanović, Dušica B., Dramićanin, Miroslav, Marinković, Aleksandar D., Aleksić, Radoslav R., "PMMA-Y2O3 (Eu3+) nanocomposites: optical and mechanical properties" in Journal of the Serbian Chemical Society, 76, no. 8 (2011):1153-1161,
https://doi.org/10.2298/JSC100330094M . .

TY  - JOUR
AU  - Stojanović, Dušica B.
AU  - Vukovic, Goran D.
AU  - Orlovic, Aleksandar M.
AU  - Uskoković, Petar S.
AU  - Aleksić, Radoslav R.
AU  - Bibić, Nataša M.
AU  - Dramićanin, Miroslav
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6743
AB  - The supercritical. CO2 method was used in order to perform deagglomeration and improve the dispersion of nano-SiO2 particles. gamma-Methacryloxypropyltrimethoxysilane was used as the surface modification reagent. The conventional method for coating nano-SiO2 particles was used as the comparison method. Considerable improvement of the dispersion and deagglomeration was found using supercritical CO2. Analysis of the TEM micrographs and DLS results showed the reduction of the average size of the agglomerates with the silane coupling reagent. Thermogravimetric analysis (TGA) showed that the particles treated in supercritical CO2 were more thermally stable than particles treated by conventional method. Encapsulation of several particles coated with the silane coupling reagent was observed in certain parts of the primary particles. A chemical reaction takes place between the modification reagent, MEMO silane, and active hydroxyl groups on the surface of the nano-SiO2 particles. A larger quantity of MEMO silane reacted using the conventional method instead of the supercritical method. On the other hand, the reacted silane molecules were better arranged around the particle surface in the supercritical. method because of the formation of covalent or self-assembled structures. Polycondensed structures were preferentially obtained in the conventional method. This was achieved by using supercritical CO2, which has a high solvating power such as organic solvents and physical properties (low viscosity, low surface tension and high diffusion coefficient) similar to gases on the other side. These properties enable the sufficient and uniform wettability of nano-SiO2 particle surfaces. These results are important for obtaining nanofillers with improved dispersion and polymer wettability. Such nanofillers can be used to obtain composite materials with considerably improved mechanical characteristics.
T2  - Hemijska industrija
T1  - Dispersion and deagglomeration of nano-SiO2 particles with a silane modification reagent in supercritical CO2
VL  - 61
IS  - 3
SP  - 109
EP  - 116
DO  - 10.2298/HEMIND0703109S
ER  - 

@article{
author = "Stojanović, Dušica B. and Vukovic, Goran D. and Orlovic, Aleksandar M. and Uskoković, Petar S. and Aleksić, Radoslav R. and Bibić, Nataša M. and Dramićanin, Miroslav",
year = "2007",
abstract = "The supercritical. CO2 method was used in order to perform deagglomeration and improve the dispersion of nano-SiO2 particles. gamma-Methacryloxypropyltrimethoxysilane was used as the surface modification reagent. The conventional method for coating nano-SiO2 particles was used as the comparison method. Considerable improvement of the dispersion and deagglomeration was found using supercritical CO2. Analysis of the TEM micrographs and DLS results showed the reduction of the average size of the agglomerates with the silane coupling reagent. Thermogravimetric analysis (TGA) showed that the particles treated in supercritical CO2 were more thermally stable than particles treated by conventional method. Encapsulation of several particles coated with the silane coupling reagent was observed in certain parts of the primary particles. A chemical reaction takes place between the modification reagent, MEMO silane, and active hydroxyl groups on the surface of the nano-SiO2 particles. A larger quantity of MEMO silane reacted using the conventional method instead of the supercritical method. On the other hand, the reacted silane molecules were better arranged around the particle surface in the supercritical. method because of the formation of covalent or self-assembled structures. Polycondensed structures were preferentially obtained in the conventional method. This was achieved by using supercritical CO2, which has a high solvating power such as organic solvents and physical properties (low viscosity, low surface tension and high diffusion coefficient) similar to gases on the other side. These properties enable the sufficient and uniform wettability of nano-SiO2 particle surfaces. These results are important for obtaining nanofillers with improved dispersion and polymer wettability. Such nanofillers can be used to obtain composite materials with considerably improved mechanical characteristics.",
journal = "Hemijska industrija",
title = "Dispersion and deagglomeration of nano-SiO2 particles with a silane modification reagent in supercritical CO2",
volume = "61",
number = "3",
pages = "109-116",
doi = "10.2298/HEMIND0703109S"
}

Stojanović, D. B., Vukovic, G. D., Orlovic, A. M., Uskoković, P. S., Aleksić, R. R., Bibić, N. M.,& Dramićanin, M.. (2007). Dispersion and deagglomeration of nano-SiO2 particles with a silane modification reagent in supercritical CO2. in Hemijska industrija, 61(3), 109-116.
https://doi.org/10.2298/HEMIND0703109S

Stojanović DB, Vukovic GD, Orlovic AM, Uskoković PS, Aleksić RR, Bibić NM, Dramićanin M. Dispersion and deagglomeration of nano-SiO2 particles with a silane modification reagent in supercritical CO2. in Hemijska industrija. 2007;61(3):109-116.
doi:10.2298/HEMIND0703109S .

Stojanović, Dušica B., Vukovic, Goran D., Orlovic, Aleksandar M., Uskoković, Petar S., Aleksić, Radoslav R., Bibić, Nataša M., Dramićanin, Miroslav, "Dispersion and deagglomeration of nano-SiO2 particles with a silane modification reagent in supercritical CO2" in Hemijska industrija, 61, no. 3 (2007):109-116,
https://doi.org/10.2298/HEMIND0703109S . .