TY  - JOUR
AU  - Elhmali, Houda Taher
AU  - Stajčić, Ivana
AU  - Stajčić, Aleksandar
AU  - Pešić, Ivan
AU  - Jovanović, Marija
AU  - Petrović, Miloš
AU  - Radojević, Vesna
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12718
AB  - While dental poly methyl methacrylate(PMMA) possesses distinctive qualities such as ease of fabrication, cost-effectiveness, and favorable physical and mechanical properties, these attributes alone are inadequate to impart the necessary impact strength and hardness. Consequently, pure PMMA is less suitable for dental applications. This research focused on the incorporation of Strontium titanate (SrTiO3-STO) and hybrid filler STO/Manganese oxide (MnO2) to improve impact resistance and hardness. The potential of STO in reinforcing PMMA is poorly investigated, while hybrid filler STO/MnO2 has not been presented yet. Differential scanning calorimetry is conducted in order to investigate the agglomeration influence on the PMMA glass transition temperature (Tg), as well as the leaching of residual monomer and volatile additives that could pose a threat to human health. It has been determined that agglomeration with 1 wt% loading had no influence on Tg, while the first scan revealed differences in evaporation of small molecules, in favor of composite PMMA-STO/MnO2, which showed the trapping potential of volatiles. Investigations of mechanical properties have revealed the significant influence of hybrid STO/MnO2 filler on microhardness and total absorbed impact energy, which were increased by 89.9% and 145.4%, respectively. Results presented in this study revealed the reinforcing potential of hybrid nanoparticles that could find application in other polymers as well.
T2  - Polymers
T1  - Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior
VL  - 16
IS  - 2
SP  - 278
DO  - 10.3390/polym16020278
ER  - 

@article{
author = "Elhmali, Houda Taher and Stajčić, Ivana and Stajčić, Aleksandar and Pešić, Ivan and Jovanović, Marija and Petrović, Miloš and Radojević, Vesna",
year = "2024",
abstract = "While dental poly methyl methacrylate(PMMA) possesses distinctive qualities such as ease of fabrication, cost-effectiveness, and favorable physical and mechanical properties, these attributes alone are inadequate to impart the necessary impact strength and hardness. Consequently, pure PMMA is less suitable for dental applications. This research focused on the incorporation of Strontium titanate (SrTiO3-STO) and hybrid filler STO/Manganese oxide (MnO2) to improve impact resistance and hardness. The potential of STO in reinforcing PMMA is poorly investigated, while hybrid filler STO/MnO2 has not been presented yet. Differential scanning calorimetry is conducted in order to investigate the agglomeration influence on the PMMA glass transition temperature (Tg), as well as the leaching of residual monomer and volatile additives that could pose a threat to human health. It has been determined that agglomeration with 1 wt% loading had no influence on Tg, while the first scan revealed differences in evaporation of small molecules, in favor of composite PMMA-STO/MnO2, which showed the trapping potential of volatiles. Investigations of mechanical properties have revealed the significant influence of hybrid STO/MnO2 filler on microhardness and total absorbed impact energy, which were increased by 89.9% and 145.4%, respectively. Results presented in this study revealed the reinforcing potential of hybrid nanoparticles that could find application in other polymers as well.",
journal = "Polymers",
title = "Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior",
volume = "16",
number = "2",
pages = "278",
doi = "10.3390/polym16020278"
}

Elhmali, H. T., Stajčić, I., Stajčić, A., Pešić, I., Jovanović, M., Petrović, M.,& Radojević, V.. (2024). Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior. in Polymers, 16(2), 278.
https://doi.org/10.3390/polym16020278

Elhmali HT, Stajčić I, Stajčić A, Pešić I, Jovanović M, Petrović M, Radojević V. Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior. in Polymers. 2024;16(2):278.
doi:10.3390/polym16020278 .

Elhmali, Houda Taher, Stajčić, Ivana, Stajčić, Aleksandar, Pešić, Ivan, Jovanović, Marija, Petrović, Miloš, Radojević, Vesna, "Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior" in Polymers, 16, no. 2 (2024):278,
https://doi.org/10.3390/polym16020278 . .

TY  - PAT
AU  - Tomić, Nataša
AU  - Vuksanović, Marija M.
AU  - Gajić Kvaščev, Maja
AU  - Jančić Heinemann, Radmila
AU  - Marinković, Aleksandar
AU  - Radojević, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12484
UR  - https://worldwide.espacenet.com/patent/search?q=pn%3DRS20181274A1
AB  - U okviru predmetnog pronalaska izvedeno je istaživanje uticaja stukture poliedarnih oligo silsekvioksana (POSS) na adheziju kompozitnih filmova na metalnoj podlozi. Kompozitni filmovi se sastoje od UV polimerizovane Bisfenol A-glicidil dimetakrilata i trietilen glikol dimetakrilat (Bis-GMA/TEGDMA) matrice i reaktivne POSS strukture za poboljšanje adhezije. Kompozitni filmovi napravljeni su sa 1, 3, 5 i 10 mas. % POSS reagenasa. Adhezija je procenjena pomoću ispitivanja mikrotvrdoće metodom po Vikersu. Ugao kvašenja kompozitnih filmova metalne podloge od mesinga meren je i poređen sa parametrom adhezije koji je dobijen iz merenja mikrotvrdoće. Optička mikroskopija pokazala je fazno razdvajanje POSS reagensa koji ukazuju na meru kompatibilnosti između matrice i svake čestice. Analiziran je oblik i veličina otiska i bio je u korelaciji sa kvalitetom adhezije. Metode korišćene u ovom radu za procenu jačine i kvaliteta adhezije jasno su pokazale da je poboljšanje adhezije Bis- GMA/TEGDMA matrice i POSS reagensa koji sadrži funkcionalnu hidoksilnu i metakrilnu grupu.
AB  - Within the scope of the present invention,the effect of the structure ofpolyhedral oligomeric silsesquioxane (POSS) on the adhesion of composite filmson metal supstrate has been researched. Composite filmscosistof UV polymerisedBisphenol A-glycidylmethacrylateandtriethylene glycol dimethacrylate (Bis-GMA/TEGDMA) matrixand reactive POSS structure to improve adhesion. Composite films are made with 1, 3, 5 and 10 wt. % of POSS reagents. Adhesion was assessedby Vickers micro-hardness test method. The wetting angle ofcomposite filmsof the brass metal substrate was measured and compared with the adhesion parameter obtained from the microhardness measurement.Optical microscopy showed phase separation of POSS reagentwhich indicating a measure of compatibility between the matrix and each particle. The shape and size of the print were analysed and correlated with the quality of adhesion. The methods used in this studyto evaluatethe strength and quality of adhesion clearly showed that the improvement of adhesion ofBis-GMA/TEGDMA matrxand POSS reagentcontaining a functional hydroxyl and methacrylic group.
PB  - Univerzitet u Beogradu : Tehnološko-metalurški fakultet
T1  - Postupak kontrole adhezije akrilatnih filmova na mesinganoj podlozi sa poboljšanom otpornošću prema gorenju
T1  - Control Process of Adhesion of Acrylic Films on a Brass Substrate With Improved Fire Resistance
SP  - Reg. br. 64831
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12484
ER  - 

@misc{
author = "Tomić, Nataša and Vuksanović, Marija M. and Gajić Kvaščev, Maja and Jančić Heinemann, Radmila and Marinković, Aleksandar and Radojević, Vesna",
year = "2023",
abstract = "U okviru predmetnog pronalaska izvedeno je istaživanje uticaja stukture poliedarnih oligo silsekvioksana (POSS) na adheziju kompozitnih filmova na metalnoj podlozi. Kompozitni filmovi se sastoje od UV polimerizovane Bisfenol A-glicidil dimetakrilata i trietilen glikol dimetakrilat (Bis-GMA/TEGDMA) matrice i reaktivne POSS strukture za poboljšanje adhezije. Kompozitni filmovi napravljeni su sa 1, 3, 5 i 10 mas. % POSS reagenasa. Adhezija je procenjena pomoću ispitivanja mikrotvrdoće metodom po Vikersu. Ugao kvašenja kompozitnih filmova metalne podloge od mesinga meren je i poređen sa parametrom adhezije koji je dobijen iz merenja mikrotvrdoće. Optička mikroskopija pokazala je fazno razdvajanje POSS reagensa koji ukazuju na meru kompatibilnosti između matrice i svake čestice. Analiziran je oblik i veličina otiska i bio je u korelaciji sa kvalitetom adhezije. Metode korišćene u ovom radu za procenu jačine i kvaliteta adhezije jasno su pokazale da je poboljšanje adhezije Bis- GMA/TEGDMA matrice i POSS reagensa koji sadrži funkcionalnu hidoksilnu i metakrilnu grupu., Within the scope of the present invention,the effect of the structure ofpolyhedral oligomeric silsesquioxane (POSS) on the adhesion of composite filmson metal supstrate has been researched. Composite filmscosistof UV polymerisedBisphenol A-glycidylmethacrylateandtriethylene glycol dimethacrylate (Bis-GMA/TEGDMA) matrixand reactive POSS structure to improve adhesion. Composite films are made with 1, 3, 5 and 10 wt. % of POSS reagents. Adhesion was assessedby Vickers micro-hardness test method. The wetting angle ofcomposite filmsof the brass metal substrate was measured and compared with the adhesion parameter obtained from the microhardness measurement.Optical microscopy showed phase separation of POSS reagentwhich indicating a measure of compatibility between the matrix and each particle. The shape and size of the print were analysed and correlated with the quality of adhesion. The methods used in this studyto evaluatethe strength and quality of adhesion clearly showed that the improvement of adhesion ofBis-GMA/TEGDMA matrxand POSS reagentcontaining a functional hydroxyl and methacrylic group.",
publisher = "Univerzitet u Beogradu : Tehnološko-metalurški fakultet",
title = "Postupak kontrole adhezije akrilatnih filmova na mesinganoj podlozi sa poboljšanom otpornošću prema gorenju, Control Process of Adhesion of Acrylic Films on a Brass Substrate With Improved Fire Resistance",
pages = "Reg. br. 64831",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12484"
}

Tomić, N., Vuksanović, M. M., Gajić Kvaščev, M., Jančić Heinemann, R., Marinković, A.,& Radojević, V.. (2023). Postupak kontrole adhezije akrilatnih filmova na mesinganoj podlozi sa poboljšanom otpornošću prema gorenju. 
Univerzitet u Beogradu : Tehnološko-metalurški fakultet., Reg. br. 64831.
https://hdl.handle.net/21.15107/rcub_vinar_12484

Tomić N, Vuksanović MM, Gajić Kvaščev M, Jančić Heinemann R, Marinković A, Radojević V. Postupak kontrole adhezije akrilatnih filmova na mesinganoj podlozi sa poboljšanom otpornošću prema gorenju. 2023;:Reg. br. 64831.
https://hdl.handle.net/21.15107/rcub_vinar_12484 .

Tomić, Nataša, Vuksanović, Marija M., Gajić Kvaščev, Maja, Jančić Heinemann, Radmila, Marinković, Aleksandar, Radojević, Vesna, "Postupak kontrole adhezije akrilatnih filmova na mesinganoj podlozi sa poboljšanom otpornošću prema gorenju" (2023):Reg. br. 64831,
https://hdl.handle.net/21.15107/rcub_vinar_12484 .

TY  - JOUR
AU  - Stajčić, Ivana
AU  - Veljković, Filip
AU  - Petrović, Miloš
AU  - Veličković, Suzana
AU  - Radojević, Vesna
AU  - Vlahović, Branislav
AU  - Stajčić, Aleksandar
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11093
AB  - High performance polymers with bio-based modifiers are promising materials in terms of applications and environmental impact. In this work, raw acacia honey was used as a bio-modifier for epoxy resin, as a rich source of functional groups. The addition of honey resulted in the formation of highly stable structures that were observed in scanning electron microscopy images as separate phases at the fracture surface, which were involved in the toughening of the resin. Structural changes were investigated, revealing the formation of a new aldehyde carbonyl group. Thermal analysis confirmed the formation of products that were stable up to 600 °C, with a glass transition temperature of 228 °C. An energy-controlled impact test was performed to compare the absorbed impact energy of bio-modified epoxy containing different amounts of honey with unmodified epoxy resin. The results showed that bio-modified epoxy resin with 3 wt% of acacia honey could withstand several impacts with full recovery, while unmodified epoxy resin broke at first impact. The absorbed energy at first impact was 2.5 times higher for bio-modified epoxy resin than it was for unmodified epoxy resin. In this manner, by using simple preparation and a raw material that is abundant in nature, a novel epoxy with high thermal and impact resistance was obtained, opening a path for further research in this field.
T2  - Polymers
T1  - Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey
VL  - 15
IS  - 10
SP  - 2261
DO  - 10.3390/polym15102261
ER  - 

@article{
author = "Stajčić, Ivana and Veljković, Filip and Petrović, Miloš and Veličković, Suzana and Radojević, Vesna and Vlahović, Branislav and Stajčić, Aleksandar",
year = "2023",
abstract = "High performance polymers with bio-based modifiers are promising materials in terms of applications and environmental impact. In this work, raw acacia honey was used as a bio-modifier for epoxy resin, as a rich source of functional groups. The addition of honey resulted in the formation of highly stable structures that were observed in scanning electron microscopy images as separate phases at the fracture surface, which were involved in the toughening of the resin. Structural changes were investigated, revealing the formation of a new aldehyde carbonyl group. Thermal analysis confirmed the formation of products that were stable up to 600 °C, with a glass transition temperature of 228 °C. An energy-controlled impact test was performed to compare the absorbed impact energy of bio-modified epoxy containing different amounts of honey with unmodified epoxy resin. The results showed that bio-modified epoxy resin with 3 wt% of acacia honey could withstand several impacts with full recovery, while unmodified epoxy resin broke at first impact. The absorbed energy at first impact was 2.5 times higher for bio-modified epoxy resin than it was for unmodified epoxy resin. In this manner, by using simple preparation and a raw material that is abundant in nature, a novel epoxy with high thermal and impact resistance was obtained, opening a path for further research in this field.",
journal = "Polymers",
title = "Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey",
volume = "15",
number = "10",
pages = "2261",
doi = "10.3390/polym15102261"
}

Stajčić, I., Veljković, F., Petrović, M., Veličković, S., Radojević, V., Vlahović, B.,& Stajčić, A.. (2023). Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey. in Polymers, 15(10), 2261.
https://doi.org/10.3390/polym15102261

Stajčić I, Veljković F, Petrović M, Veličković S, Radojević V, Vlahović B, Stajčić A. Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey. in Polymers. 2023;15(10):2261.
doi:10.3390/polym15102261 .

Stajčić, Ivana, Veljković, Filip, Petrović, Miloš, Veličković, Suzana, Radojević, Vesna, Vlahović, Branislav, Stajčić, Aleksandar, "Impact- and Thermal-Resistant Epoxy Resin Toughened with Acacia Honey" in Polymers, 15, no. 10 (2023):2261,
https://doi.org/10.3390/polym15102261 . .

TY  - JOUR
AU  - Perišić, Srđan
AU  - Kareem Ali Alzaroug, Azdihar
AU  - Kalevski, Katarina
AU  - Vuksanović, Marija M.
AU  - Volkov-Husović, Tatjana
AU  - Radović, Ivana M.
AU  - Radojević, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10053
AB  - Polymer matrix composite materials have found application in dentistry because of good mechanical properties, aesthetic, easy processing, and possibilities of the repair. Acrylates are materials used to make and repair dentures. Reinforcements in the form of short glass or polymer fibers are added to improve the mechanical properties of dental polymers. In this study, the processing of composite material with a polymer matrix from commercial auto-polymerized acrylate Simgal, with reinforcement in the form of short poly(ethylene terephthalate) (PET) fibers was examined. Samples were processed in three series: pure Simgal, Simgal/PET 1 wt% and Simgal/PET 3 wt%. The influence of the reinforcement in the form of short PET fibers on the mechanical properties of composite materials was investigated. Strength and hardness were tested by impact testing and Vickers microhardness, and it was shown that there is an increase in absorbed energy and hardness. The modulus was reduced by the addition of PET fibers and by increasing the amount of fibers in the composite. The increase in the amount of PET fibers also resulted in a smaller loss of surface mass of the samples compared to the pure matrix by 63% and 93%, respectively. Cavitation test revealed better cavitation resistance of composites than the pure acrylate.
T2  - Polymer Composites
T1  - Denture composite reinforced with short polyethylene terephthalate fibers
IS  - 1
SP  - 543
EP  - 550
DO  - 10.1002/pc.26397
ER  - 

@article{
author = "Perišić, Srđan and Kareem Ali Alzaroug, Azdihar and Kalevski, Katarina and Vuksanović, Marija M. and Volkov-Husović, Tatjana and Radović, Ivana M. and Radojević, Vesna",
year = "2022",
abstract = "Polymer matrix composite materials have found application in dentistry because of good mechanical properties, aesthetic, easy processing, and possibilities of the repair. Acrylates are materials used to make and repair dentures. Reinforcements in the form of short glass or polymer fibers are added to improve the mechanical properties of dental polymers. In this study, the processing of composite material with a polymer matrix from commercial auto-polymerized acrylate Simgal, with reinforcement in the form of short poly(ethylene terephthalate) (PET) fibers was examined. Samples were processed in three series: pure Simgal, Simgal/PET 1 wt% and Simgal/PET 3 wt%. The influence of the reinforcement in the form of short PET fibers on the mechanical properties of composite materials was investigated. Strength and hardness were tested by impact testing and Vickers microhardness, and it was shown that there is an increase in absorbed energy and hardness. The modulus was reduced by the addition of PET fibers and by increasing the amount of fibers in the composite. The increase in the amount of PET fibers also resulted in a smaller loss of surface mass of the samples compared to the pure matrix by 63% and 93%, respectively. Cavitation test revealed better cavitation resistance of composites than the pure acrylate.",
journal = "Polymer Composites",
title = "Denture composite reinforced with short polyethylene terephthalate fibers",
number = "1",
pages = "543-550",
doi = "10.1002/pc.26397"
}

Perišić, S., Kareem Ali Alzaroug, A., Kalevski, K., Vuksanović, M. M., Volkov-Husović, T., Radović, I. M.,& Radojević, V.. (2022). Denture composite reinforced with short polyethylene terephthalate fibers. in Polymer Composites(1), 543-550.
https://doi.org/10.1002/pc.26397

Perišić S, Kareem Ali Alzaroug A, Kalevski K, Vuksanović MM, Volkov-Husović T, Radović IM, Radojević V. Denture composite reinforced with short polyethylene terephthalate fibers. in Polymer Composites. 2022;(1):543-550.
doi:10.1002/pc.26397 .

Perišić, Srđan, Kareem Ali Alzaroug, Azdihar, Kalevski, Katarina, Vuksanović, Marija M., Volkov-Husović, Tatjana, Radović, Ivana M., Radojević, Vesna, "Denture composite reinforced with short polyethylene terephthalate fibers" in Polymer Composites, no. 1 (2022):543-550,
https://doi.org/10.1002/pc.26397 . .

TY  - JOUR
AU  - Obradović, Vera
AU  - Vuksanović, Marija M.
AU  - Tomić, Nataša
AU  - Petrović, Miloš
AU  - Marinković, Aleksandar
AU  - Stojanović, Dušica
AU  - Radojević, Vesna
AU  - Jančić-Heinemann, Radmila
AU  - Uskoković, Petar
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10337
AB  - This study presents the impact properties of the new form of hybrid thermoplastic composites. The Kolon fabrics were impregnated with the 10 wt% poly (vinyl butyral) (PVB)/ethanol solution with the addition of silica (SiO2) particles originating from rice husk or layered double hydroxide modified silica particles (FeAl-LDH@SiO2) as reinforcement. All the composites consisted of one layer of the impregnated fabric where the silica particles concentrations were 0.5 wt% and 1.0 wt% regarding PVB. The impact properties of the composite samples were analyzed by the controlled energy puncture impact tester. The structures of the composite samples were determined by the attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and field emission scanning electron microscopy (FE-SEM). The results showed that the Kolon/PVB/1 wt% FeAl-LDH@SiO2 sample yielded the maximum impact force.
T2  - Materials Letters
T1  - Impact properties of Kolon/PVB fabrics reinforced with rice-husk silica particles
VL  - 324
SP  - 132668
DO  - 10.1016/j.matlet.2022.132668
ER  - 

@article{
author = "Obradović, Vera and Vuksanović, Marija M. and Tomić, Nataša and Petrović, Miloš and Marinković, Aleksandar and Stojanović, Dušica and Radojević, Vesna and Jančić-Heinemann, Radmila and Uskoković, Petar",
year = "2022",
abstract = "This study presents the impact properties of the new form of hybrid thermoplastic composites. The Kolon fabrics were impregnated with the 10 wt% poly (vinyl butyral) (PVB)/ethanol solution with the addition of silica (SiO2) particles originating from rice husk or layered double hydroxide modified silica particles (FeAl-LDH@SiO2) as reinforcement. All the composites consisted of one layer of the impregnated fabric where the silica particles concentrations were 0.5 wt% and 1.0 wt% regarding PVB. The impact properties of the composite samples were analyzed by the controlled energy puncture impact tester. The structures of the composite samples were determined by the attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and field emission scanning electron microscopy (FE-SEM). The results showed that the Kolon/PVB/1 wt% FeAl-LDH@SiO2 sample yielded the maximum impact force.",
journal = "Materials Letters",
title = "Impact properties of Kolon/PVB fabrics reinforced with rice-husk silica particles",
volume = "324",
pages = "132668",
doi = "10.1016/j.matlet.2022.132668"
}

Obradović, V., Vuksanović, M. M., Tomić, N., Petrović, M., Marinković, A., Stojanović, D., Radojević, V., Jančić-Heinemann, R.,& Uskoković, P.. (2022). Impact properties of Kolon/PVB fabrics reinforced with rice-husk silica particles. in Materials Letters, 324, 132668.
https://doi.org/10.1016/j.matlet.2022.132668

Obradović V, Vuksanović MM, Tomić N, Petrović M, Marinković A, Stojanović D, Radojević V, Jančić-Heinemann R, Uskoković P. Impact properties of Kolon/PVB fabrics reinforced with rice-husk silica particles. in Materials Letters. 2022;324:132668.
doi:10.1016/j.matlet.2022.132668 .

Obradović, Vera, Vuksanović, Marija M., Tomić, Nataša, Petrović, Miloš, Marinković, Aleksandar, Stojanović, Dušica, Radojević, Vesna, Jančić-Heinemann, Radmila, Uskoković, Petar, "Impact properties of Kolon/PVB fabrics reinforced with rice-husk silica particles" in Materials Letters, 324 (2022):132668,
https://doi.org/10.1016/j.matlet.2022.132668 . .

TY  - JOUR
AU  - Pešić, Ivan
AU  - Petrović, Miloš
AU  - Vuksanović, Marija M.
AU  - Popović, Maja
AU  - Rabasović, Maja
AU  - Šević, Dragutin
AU  - Radojević, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10668
AB  - Processing and characterization of PMMA-MXene composites were investigated. γ-Methacryloxypropyltrimethoxy (MEMO) silane was used to modify the surface of MXenes and improve the compatibility between MXenes and the polymer. The FTIR analysis revealed the formation of a chemical bond between MXene and MEMO silane, while the XPS analysis confirmed the presence of silicon in the functionalized MXene. PMMA composites with non-functionalized and functionalized MXene were prepared using a solution casting method. Tensile tests showed that, compared to neat PMMA, Young’s modulus increased in both composites by 22.1 and 27.6%, respectively. As a result of coupling between the PMMA matrix and the surface-modified MXenes, the tensile strength also increased by about 37%. In addition, optical spectroscopy showed higher absorption for the composite with surface-modified MXenes and short-lived fluorescence with emission intensity sensitive to the crumpling of functionalized MXene nanosheets.
T2  - Nanocomposites
T1  - Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane
VL  - 8
IS  - 1
SP  - 215
EP  - 226
DO  - 10.1080/20550324.2023.2168844
ER  - 

@article{
author = "Pešić, Ivan and Petrović, Miloš and Vuksanović, Marija M. and Popović, Maja and Rabasović, Maja and Šević, Dragutin and Radojević, Vesna",
year = "2022",
abstract = "Processing and characterization of PMMA-MXene composites were investigated. γ-Methacryloxypropyltrimethoxy (MEMO) silane was used to modify the surface of MXenes and improve the compatibility between MXenes and the polymer. The FTIR analysis revealed the formation of a chemical bond between MXene and MEMO silane, while the XPS analysis confirmed the presence of silicon in the functionalized MXene. PMMA composites with non-functionalized and functionalized MXene were prepared using a solution casting method. Tensile tests showed that, compared to neat PMMA, Young’s modulus increased in both composites by 22.1 and 27.6%, respectively. As a result of coupling between the PMMA matrix and the surface-modified MXenes, the tensile strength also increased by about 37%. In addition, optical spectroscopy showed higher absorption for the composite with surface-modified MXenes and short-lived fluorescence with emission intensity sensitive to the crumpling of functionalized MXene nanosheets.",
journal = "Nanocomposites",
title = "Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane",
volume = "8",
number = "1",
pages = "215-226",
doi = "10.1080/20550324.2023.2168844"
}

Pešić, I., Petrović, M., Vuksanović, M. M., Popović, M., Rabasović, M., Šević, D.,& Radojević, V.. (2022). Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane. in Nanocomposites, 8(1), 215-226.
https://doi.org/10.1080/20550324.2023.2168844

Pešić I, Petrović M, Vuksanović MM, Popović M, Rabasović M, Šević D, Radojević V. Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane. in Nanocomposites. 2022;8(1):215-226.
doi:10.1080/20550324.2023.2168844 .

Pešić, Ivan, Petrović, Miloš, Vuksanović, Marija M., Popović, Maja, Rabasović, Maja, Šević, Dragutin, Radojević, Vesna, "Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane" in Nanocomposites, 8, no. 1 (2022):215-226,
https://doi.org/10.1080/20550324.2023.2168844 . .

TY  - JOUR
AU  - Stajčić, Ivana
AU  - Stajčić, Aleksandar
AU  - Serpa, Cristina
AU  - Vasiljević-Radović, Dana
AU  - Ranđelović, Branislav
AU  - Radojević, Vesna
AU  - Fecht, Hans
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10576
AB  - Polymers and polymer matrix composites are commonly used materials with applications extending from packaging materials to delicate electronic devices. Epoxy resins and fiber-reinforced epoxy-based composites have been used as adhesives and construction parts. Fractal analysis has been recognized in materials science as a valuable tool for the microstructural characterization of composites by connecting fractal characteristics with composites’ functional properties. In this study, fractal reconstructions of different microstructural shapes in an epoxy-based composite were performed on field emission scanning electron microscopy (FESEM) images. These images were of glass fiber reinforced epoxy as well as a hybrid composite containing both glass and electrospun polystyrene fibers in an epoxy matrix. Fractal reconstruction enables the identification of self-similarity in the fractal structure, which represents a novelty in analyzing the fractal properties of materials. Fractal Real Finder software, based on the mathematical affine fractal regression model, was employed to reconstruct different microstructure shapes and calculate fractal dimensions to develop a method of predicting the optimal structure–property relations in composite materials in the future.
T2  - Fractal and Fractional
T1  - Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †
VL  - 6
IS  - 12
SP  - 741
DO  - 10.3390/fractalfract6120741
ER  - 

@article{
author = "Stajčić, Ivana and Stajčić, Aleksandar and Serpa, Cristina and Vasiljević-Radović, Dana and Ranđelović, Branislav and Radojević, Vesna and Fecht, Hans",
year = "2022",
abstract = "Polymers and polymer matrix composites are commonly used materials with applications extending from packaging materials to delicate electronic devices. Epoxy resins and fiber-reinforced epoxy-based composites have been used as adhesives and construction parts. Fractal analysis has been recognized in materials science as a valuable tool for the microstructural characterization of composites by connecting fractal characteristics with composites’ functional properties. In this study, fractal reconstructions of different microstructural shapes in an epoxy-based composite were performed on field emission scanning electron microscopy (FESEM) images. These images were of glass fiber reinforced epoxy as well as a hybrid composite containing both glass and electrospun polystyrene fibers in an epoxy matrix. Fractal reconstruction enables the identification of self-similarity in the fractal structure, which represents a novelty in analyzing the fractal properties of materials. Fractal Real Finder software, based on the mathematical affine fractal regression model, was employed to reconstruct different microstructure shapes and calculate fractal dimensions to develop a method of predicting the optimal structure–property relations in composite materials in the future.",
journal = "Fractal and Fractional",
title = "Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †",
volume = "6",
number = "12",
pages = "741",
doi = "10.3390/fractalfract6120741"
}

Stajčić, I., Stajčić, A., Serpa, C., Vasiljević-Radović, D., Ranđelović, B., Radojević, V.,& Fecht, H.. (2022). Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †. in Fractal and Fractional, 6(12), 741.
https://doi.org/10.3390/fractalfract6120741

Stajčić I, Stajčić A, Serpa C, Vasiljević-Radović D, Ranđelović B, Radojević V, Fecht H. Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †. in Fractal and Fractional. 2022;6(12):741.
doi:10.3390/fractalfract6120741 .

Stajčić, Ivana, Stajčić, Aleksandar, Serpa, Cristina, Vasiljević-Radović, Dana, Ranđelović, Branislav, Radojević, Vesna, Fecht, Hans, "Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †" in Fractal and Fractional, 6, no. 12 (2022):741,
https://doi.org/10.3390/fractalfract6120741 . .

TY  - JOUR
AU  - Vuksanović, Marija M.
AU  - Egelja, Adela
AU  - Barudžija, Tanja
AU  - Tomić, Nataša
AU  - Petrović, Miloš
AU  - Marinković, Aleksandar
AU  - Radojević, Vesna
AU  - Jančić-Heinemann, Radmila
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10014
AB  - Silica particles were obtained from rice husk to which layered double hydroxide particles were deposited (weight ratio 1 : 1). Fe2+-Al3+ layered double hydroxides (FeAl-LDH) were synthesized by co-precipitation with ratios Fe : Al of 3 : 1 in the presence of SiO2 particles from the rice husk. Characterization of the synthesized FeAl-LDH@SiO2 particles was performed by X-ray diffraction, Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy with EDS. Prepared FeAl-LDH@SiO2 particles were used as reinforcing agents in 1, 3 and 5 wt% quantity in poly (methyl) methacrylate matrix. The aim of this study was to examine whether FeAl-LDH@SiO2 particles affect the mechanical properties of polymer composite materials. The morphology of the composites was examined using a field emission scanning electron microscope. Microindentation, tensile and impact testing determined the mechanical properties of the obtained composites.
T2  - Royal Society Open Science
T2  - Royal Society Open Science
T1  - Inorganically modified particles FeAl-LDH@SiO2 as reinforcement in poly (methyl) methacrylate matrix composite
VL  - 8
IS  - 9
SP  - 210835
DO  - 10.1098/rsos.210835
ER  - 

@article{
author = "Vuksanović, Marija M. and Egelja, Adela and Barudžija, Tanja and Tomić, Nataša and Petrović, Miloš and Marinković, Aleksandar and Radojević, Vesna and Jančić-Heinemann, Radmila",
year = "2021",
abstract = "Silica particles were obtained from rice husk to which layered double hydroxide particles were deposited (weight ratio 1 : 1). Fe2+-Al3+ layered double hydroxides (FeAl-LDH) were synthesized by co-precipitation with ratios Fe : Al of 3 : 1 in the presence of SiO2 particles from the rice husk. Characterization of the synthesized FeAl-LDH@SiO2 particles was performed by X-ray diffraction, Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy with EDS. Prepared FeAl-LDH@SiO2 particles were used as reinforcing agents in 1, 3 and 5 wt% quantity in poly (methyl) methacrylate matrix. The aim of this study was to examine whether FeAl-LDH@SiO2 particles affect the mechanical properties of polymer composite materials. The morphology of the composites was examined using a field emission scanning electron microscope. Microindentation, tensile and impact testing determined the mechanical properties of the obtained composites.",
journal = "Royal Society Open Science, Royal Society Open Science",
title = "Inorganically modified particles FeAl-LDH@SiO2 as reinforcement in poly (methyl) methacrylate matrix composite",
volume = "8",
number = "9",
pages = "210835",
doi = "10.1098/rsos.210835"
}

Vuksanović, M. M., Egelja, A., Barudžija, T., Tomić, N., Petrović, M., Marinković, A., Radojević, V.,& Jančić-Heinemann, R.. (2021). Inorganically modified particles FeAl-LDH@SiO2 as reinforcement in poly (methyl) methacrylate matrix composite. in Royal Society Open Science, 8(9), 210835.
https://doi.org/10.1098/rsos.210835

Vuksanović MM, Egelja A, Barudžija T, Tomić N, Petrović M, Marinković A, Radojević V, Jančić-Heinemann R. Inorganically modified particles FeAl-LDH@SiO2 as reinforcement in poly (methyl) methacrylate matrix composite. in Royal Society Open Science. 2021;8(9):210835.
doi:10.1098/rsos.210835 .

Vuksanović, Marija M., Egelja, Adela, Barudžija, Tanja, Tomić, Nataša, Petrović, Miloš, Marinković, Aleksandar, Radojević, Vesna, Jančić-Heinemann, Radmila, "Inorganically modified particles FeAl-LDH@SiO2 as reinforcement in poly (methyl) methacrylate matrix composite" in Royal Society Open Science, 8, no. 9 (2021):210835,
https://doi.org/10.1098/rsos.210835 . .

TY  - JOUR
AU  - Kalifa, Mustafa
AU  - Tomić, Nataša Z.
AU  - Algellai, Ahmed A.
AU  - Vuksanović, Marija M.
AU  - Radojević, Vesna
AU  - Jančić-Heinemann, Radmila
AU  - Marinković, Aleksandar D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9583
AB  - The objective of this study was to investigate the influence of polyhedral oligomeric silsesquioxane (POSS) structure on the adhesion behaviour of composite films onto a metallic surface. The composite films consisted of UV cured bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA) as matrix and reactive POSS structures as adhesion enhancers. Composites were made with 1, 3 and 5 wt % of POSS. Adhesion was evaluated using the micro Vickers hardness testing method. The contact angle of composite films to a brass substrate was measured and compared to the adhesion parameter obtained from microhardness measurements. Optical microscopy indicated morphological segregation in the hybrid films suggesting the compatibility extent between the matrix and each particle. The shape and size of the indent were analyzed and correlated with adhesion quality. The methods used for the estimation of adhesion strength and quality clearly indicated that the highest adhesion enhancement of the Bis-GMA/TEGDMA matrix was POSS reagent containing both polar (hydroxyl) and nonpolar (unsaturated aliphatic - allyl) side groups. © 2020 Elsevier Ltd
T2  - International Journal of Adhesion and Adhesives
T1  - The effect of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS) on hybrid film adhesion
VL  - 103
DO  - 10.1016/j.ijadhadh.2020.102719
ER  - 

@article{
author = "Kalifa, Mustafa and Tomić, Nataša Z. and Algellai, Ahmed A. and Vuksanović, Marija M. and Radojević, Vesna and Jančić-Heinemann, Radmila and Marinković, Aleksandar D.",
year = "2020",
abstract = "The objective of this study was to investigate the influence of polyhedral oligomeric silsesquioxane (POSS) structure on the adhesion behaviour of composite films onto a metallic surface. The composite films consisted of UV cured bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA) as matrix and reactive POSS structures as adhesion enhancers. Composites were made with 1, 3 and 5 wt % of POSS. Adhesion was evaluated using the micro Vickers hardness testing method. The contact angle of composite films to a brass substrate was measured and compared to the adhesion parameter obtained from microhardness measurements. Optical microscopy indicated morphological segregation in the hybrid films suggesting the compatibility extent between the matrix and each particle. The shape and size of the indent were analyzed and correlated with adhesion quality. The methods used for the estimation of adhesion strength and quality clearly indicated that the highest adhesion enhancement of the Bis-GMA/TEGDMA matrix was POSS reagent containing both polar (hydroxyl) and nonpolar (unsaturated aliphatic - allyl) side groups. © 2020 Elsevier Ltd",
journal = "International Journal of Adhesion and Adhesives",
title = "The effect of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS) on hybrid film adhesion",
volume = "103",
doi = "10.1016/j.ijadhadh.2020.102719"
}

Kalifa, M., Tomić, N. Z., Algellai, A. A., Vuksanović, M. M., Radojević, V., Jančić-Heinemann, R.,& Marinković, A. D.. (2020). The effect of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS) on hybrid film adhesion. in International Journal of Adhesion and Adhesives, 103.
https://doi.org/10.1016/j.ijadhadh.2020.102719

Kalifa M, Tomić NZ, Algellai AA, Vuksanović MM, Radojević V, Jančić-Heinemann R, Marinković AD. The effect of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS) on hybrid film adhesion. in International Journal of Adhesion and Adhesives. 2020;103.
doi:10.1016/j.ijadhadh.2020.102719 .

Kalifa, Mustafa, Tomić, Nataša Z., Algellai, Ahmed A., Vuksanović, Marija M., Radojević, Vesna, Jančić-Heinemann, Radmila, Marinković, Aleksandar D., "The effect of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS) on hybrid film adhesion" in International Journal of Adhesion and Adhesives, 103 (2020),
https://doi.org/10.1016/j.ijadhadh.2020.102719 . .

TY  - JOUR
AU  - Ćurčić, Milica
AU  - Hadžić, Branka B.
AU  - Gilić, Martina
AU  - Radojević, Vesna
AU  - Bjelajac, Anđelika
AU  - Radović, Ivana M.
AU  - Timotijević, Dejan
AU  - Romčević, Maja J.
AU  - Trajić, Jelena
AU  - Romčević, Nebojša Ž.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8494
AB  - The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite. © 2019 Elsevier B.V.
T2  - Physica E: Low-dimensional Systems and Nanostructures
T1  - Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites
VL  - 115
SP  - 113708
DO  - 10.1016/j.physe.2019.113708
ER  - 

@article{
author = "Ćurčić, Milica and Hadžić, Branka B. and Gilić, Martina and Radojević, Vesna and Bjelajac, Anđelika and Radović, Ivana M. and Timotijević, Dejan and Romčević, Maja J. and Trajić, Jelena and Romčević, Nebojša Ž.",
year = "2020",
abstract = "The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite. © 2019 Elsevier B.V.",
journal = "Physica E: Low-dimensional Systems and Nanostructures",
title = "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites",
volume = "115",
pages = "113708",
doi = "10.1016/j.physe.2019.113708"
}

Ćurčić, M., Hadžić, B. B., Gilić, M., Radojević, V., Bjelajac, A., Radović, I. M., Timotijević, D., Romčević, M. J., Trajić, J.,& Romčević, N. Ž.. (2020). Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E: Low-dimensional Systems and Nanostructures, 115, 113708.
https://doi.org/10.1016/j.physe.2019.113708

Ćurčić M, Hadžić BB, Gilić M, Radojević V, Bjelajac A, Radović IM, Timotijević D, Romčević MJ, Trajić J, Romčević NŽ. Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E: Low-dimensional Systems and Nanostructures. 2020;115:113708.
doi:10.1016/j.physe.2019.113708 .

Ćurčić, Milica, Hadžić, Branka B., Gilić, Martina, Radojević, Vesna, Bjelajac, Anđelika, Radović, Ivana M., Timotijević, Dejan, Romčević, Maja J., Trajić, Jelena, Romčević, Nebojša Ž., "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites" in Physica E: Low-dimensional Systems and Nanostructures, 115 (2020):113708,
https://doi.org/10.1016/j.physe.2019.113708 . .

TY  - JOUR
AU  - Radović, Ivana M.
AU  - Stajčić, Aleksandar
AU  - Radisavljević, Anđela
AU  - Veljković, Filip M.
AU  - Čebela, Maria
AU  - Mitić, Vojislav V.
AU  - Radojević, Vesna
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9609
AB  - Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing. © 2020 Elsevier B.V.
T2  - Materials Chemistry and Physics
T1  - Solvent effects on structural changes in self-healing epoxy composites
VL  - 256
DO  - 10.1016/j.matchemphys.2020.123761
ER  - 

@article{
author = "Radović, Ivana M. and Stajčić, Aleksandar and Radisavljević, Anđela and Veljković, Filip M. and Čebela, Maria and Mitić, Vojislav V. and Radojević, Vesna",
year = "2020",
abstract = "Nowadays, there is a very high importance of composite research and variety of their applications in the modern world. In that sense, we researched hollow glass capillaries filled with dissolved Grubbs catalyst (GC) and dicyclopentadiene (DCPD) were incorporated into a fiber-reinforced epoxy with the aim of improving the flow of healing agents to the crack site. The morphological investigation of the crack site was performed using field emission scanning electron microscopy (FESEM), showing the difference between the samples depending on the used solvent. The software analysis of sample photographs has been performed by calculating the fractured/healed surface area of the samples, revealing that approximately 20% of the volume was affected by the impact. Fourier transform infrared spectroscopy (FTIR) revealed that poly (dicyclopentadiene) (PDCPD) formed at the healed interface. However, the FTIR investigation of catalyst stability in different solvents showed structural changes in GC and partial deactivation. The mechanical tests of the samples showed that a recovery of 60% after 24 h at room temperature could be achieved through the use of a solvent and very low concentration of GC. The performed research results are a good base to develop the model for predicting the processes and morphology, with the goal to design the final mechanical and in the future, thermal, properties in advance. This opens a new direction for future research in the field of composite healing. © 2020 Elsevier B.V.",
journal = "Materials Chemistry and Physics",
title = "Solvent effects on structural changes in self-healing epoxy composites",
volume = "256",
doi = "10.1016/j.matchemphys.2020.123761"
}

Radović, I. M., Stajčić, A., Radisavljević, A., Veljković, F. M., Čebela, M., Mitić, V. V.,& Radojević, V.. (2020). Solvent effects on structural changes in self-healing epoxy composites. in Materials Chemistry and Physics, 256.
https://doi.org/10.1016/j.matchemphys.2020.123761

Radović IM, Stajčić A, Radisavljević A, Veljković FM, Čebela M, Mitić VV, Radojević V. Solvent effects on structural changes in self-healing epoxy composites. in Materials Chemistry and Physics. 2020;256.
doi:10.1016/j.matchemphys.2020.123761 .

Radović, Ivana M., Stajčić, Aleksandar, Radisavljević, Anđela, Veljković, Filip M., Čebela, Maria, Mitić, Vojislav V., Radojević, Vesna, "Solvent effects on structural changes in self-healing epoxy composites" in Materials Chemistry and Physics, 256 (2020),
https://doi.org/10.1016/j.matchemphys.2020.123761 . .

TY  - JOUR
AU  - Abozaid, Rouaida Mohamed
AU  - Lazarević, Zorica Ž.
AU  - Radović, Ivana M.
AU  - Gilić, Martina
AU  - Šević, Dragutin M.
AU  - Rabasović, Maja S.
AU  - Radojević, Vesna
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925346719303131
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8195
AB  - Processing and characterization of polymer nanocomposites based on poly (methyl methacrylate) (PMMA) matrix with embedded core-shell CdSe/ZnS quantum dots (QD's) were presented in this work. The aim is to preserve the optical activity of QD's in nanocomposite processing with improved mechanical properties. The modification of QD's CdSe/ZnS-PMMA interface was achieved with 3-mercaptopropyltrimethoxysilane (MPTMS). Nanocomposites were processed by solution casting. The samples of pure PMMA, and composites with unmodified and silane modified QD's CdSe/ZnS were processed. FTIR analysis revealed modification of QD's with silane and characteristic bonding with PMMA matrix. Raman spectrum confirms a presence of alloyed layer at the core-shell interface. Time-resolved laser induced fluorescence measurements confirmed slight blue shift in QD's CdSe/ZnS-PMMA composite without interface modification, while there was a slight red shift with modified particles. Oxidation effects in quantum dots were removed with the use of PMMA as a host, and the core remained active, which was confirmed with FTIR analysis and time-resolved laser induced fluorescence measurements. © 2019
T2  - Optical Materials
T1  - Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications
VL  - 92
SP  - 405
EP  - 410
DO  - 10.1016/j.optmat.2019.05.012
ER  - 

@article{
author = "Abozaid, Rouaida Mohamed and Lazarević, Zorica Ž. and Radović, Ivana M. and Gilić, Martina and Šević, Dragutin M. and Rabasović, Maja S. and Radojević, Vesna",
year = "2019",
abstract = "Processing and characterization of polymer nanocomposites based on poly (methyl methacrylate) (PMMA) matrix with embedded core-shell CdSe/ZnS quantum dots (QD's) were presented in this work. The aim is to preserve the optical activity of QD's in nanocomposite processing with improved mechanical properties. The modification of QD's CdSe/ZnS-PMMA interface was achieved with 3-mercaptopropyltrimethoxysilane (MPTMS). Nanocomposites were processed by solution casting. The samples of pure PMMA, and composites with unmodified and silane modified QD's CdSe/ZnS were processed. FTIR analysis revealed modification of QD's with silane and characteristic bonding with PMMA matrix. Raman spectrum confirms a presence of alloyed layer at the core-shell interface. Time-resolved laser induced fluorescence measurements confirmed slight blue shift in QD's CdSe/ZnS-PMMA composite without interface modification, while there was a slight red shift with modified particles. Oxidation effects in quantum dots were removed with the use of PMMA as a host, and the core remained active, which was confirmed with FTIR analysis and time-resolved laser induced fluorescence measurements. © 2019",
journal = "Optical Materials",
title = "Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications",
volume = "92",
pages = "405-410",
doi = "10.1016/j.optmat.2019.05.012"
}

Abozaid, R. M., Lazarević, Z. Ž., Radović, I. M., Gilić, M., Šević, D. M., Rabasović, M. S.,& Radojević, V.. (2019). Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications. in Optical Materials, 92, 405-410.
https://doi.org/10.1016/j.optmat.2019.05.012

Abozaid RM, Lazarević ZŽ, Radović IM, Gilić M, Šević DM, Rabasović MS, Radojević V. Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications. in Optical Materials. 2019;92:405-410.
doi:10.1016/j.optmat.2019.05.012 .

Abozaid, Rouaida Mohamed, Lazarević, Zorica Ž., Radović, Ivana M., Gilić, Martina, Šević, Dragutin M., Rabasović, Maja S., Radojević, Vesna, "Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications" in Optical Materials, 92 (2019):405-410,
https://doi.org/10.1016/j.optmat.2019.05.012 . .

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 . .

Jančić Heinemann, R., Vuksanović, M. M., Tomić, N., Petrović, M., Spasojević, P., Radišić, M., Radojević, V., Trifunović, D.,& Marinković, A.. (2018). Kompozitni materijali na bazi PMMA modifikovan dimetil itakonatom sa poboljšanom žilavosti i smanjenom količinom zaostalog monomera. .
https://hdl.handle.net/21.15107/rcub_vinar_13003

Jančić Heinemann R, Vuksanović MM, Tomić N, Petrović M, Spasojević P, Radišić M, Radojević V, Trifunović D, Marinković A. Kompozitni materijali na bazi PMMA modifikovan dimetil itakonatom sa poboljšanom žilavosti i smanjenom količinom zaostalog monomera. 2018;.
https://hdl.handle.net/21.15107/rcub_vinar_13003 .

Jančić Heinemann, Radmila, Vuksanović, Marija M., Tomić, Nataša, Petrović, Miloš, Spasojević, Pavle, Radišić, Marina, Radojević, Vesna, Trifunović, Dejan, Marinković, Aleksandar, "Kompozitni materijali na bazi PMMA modifikovan dimetil itakonatom sa poboljšanom žilavosti i smanjenom količinom zaostalog monomera" (2018),
https://hdl.handle.net/21.15107/rcub_vinar_13003 .

TY  - JOUR
AU  - Lazouzi, Gamal
AU  - Vuksanović, Marija M.
AU  - Tomić, Nataša Z.
AU  - Mitrić, Miodrag
AU  - Petrović, Miloš
AU  - Radojević, Vesna
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7639
AB  - Alumina based particles were prepared from aluminium chloride hydroxide as starting material by sol-gel technique. One series of particles was doped with ferrous oxide. Both series of particles were calcinated at three different temperatures: 700 degrees C, 800 degrees C and 900 degrees C. Poly(methyl methacrylate), PMMA, was used as a matrix and two different types of alumina based particles were added into the matrix to form the composites. All composites consisted of 3 wt% of alumina based particles. The aim of this study was to examine whether and how the temperature of particle calcination affects the microhardness and mechanical properties of the composite. The particles were characterized by the X-ray diffraction (XRD) and physical absorption methods. The morphology of the composites was examined using a field emission scanning electron microscope (FESEM). The microhardness of composites was measured using a traditional Vickers hardness (HV) method. The mechanical characteristics of obtained composites were determined using tensile test and impact testing.
T2  - Ceramics International
T1  - Optimized preparation of alumina based fillers for tuning composite properties
VL  - 44
IS  - 7
SP  - 7442
EP  - 7449
DO  - 10.1016/j.ceramint.2018.01.083
ER  - 

@article{
author = "Lazouzi, Gamal and Vuksanović, Marija M. and Tomić, Nataša Z. and Mitrić, Miodrag and Petrović, Miloš and Radojević, Vesna and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "Alumina based particles were prepared from aluminium chloride hydroxide as starting material by sol-gel technique. One series of particles was doped with ferrous oxide. Both series of particles were calcinated at three different temperatures: 700 degrees C, 800 degrees C and 900 degrees C. Poly(methyl methacrylate), PMMA, was used as a matrix and two different types of alumina based particles were added into the matrix to form the composites. All composites consisted of 3 wt% of alumina based particles. The aim of this study was to examine whether and how the temperature of particle calcination affects the microhardness and mechanical properties of the composite. The particles were characterized by the X-ray diffraction (XRD) and physical absorption methods. The morphology of the composites was examined using a field emission scanning electron microscope (FESEM). The microhardness of composites was measured using a traditional Vickers hardness (HV) method. The mechanical characteristics of obtained composites were determined using tensile test and impact testing.",
journal = "Ceramics International",
title = "Optimized preparation of alumina based fillers for tuning composite properties",
volume = "44",
number = "7",
pages = "7442-7449",
doi = "10.1016/j.ceramint.2018.01.083"
}

Lazouzi, G., Vuksanović, M. M., Tomić, N. Z., Mitrić, M., Petrović, M., Radojević, V.,& Jančić-Heinemann, R.. (2018). Optimized preparation of alumina based fillers for tuning composite properties. in Ceramics International, 44(7), 7442-7449.
https://doi.org/10.1016/j.ceramint.2018.01.083

Lazouzi G, Vuksanović MM, Tomić NZ, Mitrić M, Petrović M, Radojević V, Jančić-Heinemann R. Optimized preparation of alumina based fillers for tuning composite properties. in Ceramics International. 2018;44(7):7442-7449.
doi:10.1016/j.ceramint.2018.01.083 .

Lazouzi, Gamal, Vuksanović, Marija M., Tomić, Nataša Z., Mitrić, Miodrag, Petrović, Miloš, Radojević, Vesna, Jančić-Heinemann, Radmila, "Optimized preparation of alumina based fillers for tuning composite properties" in Ceramics International, 44, no. 7 (2018):7442-7449,
https://doi.org/10.1016/j.ceramint.2018.01.083 . .

TY  - JOUR
AU  - Musbah, S. S.
AU  - Radojević, Vesna
AU  - Radović, Ivana M.
AU  - Uskokovic, P. S.
AU  - Stojanović, Danka
AU  - Dramićanin, Miroslav
AU  - Aleksić, R.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5103
AB  - This study reports research related to different preparation methods and characterization of polymer nanocomposites for optical applications. The Eu-ion doped Gd2O3 nanophosphor powder with different nanoparticle content was embedded in the matrix of PMMA. Preparation was carried out by mixing molding (bulk), electrospinning (nanofibers) and solution casting (thin films) with neat particles and particles coated with AMEO silane. Among the pros and cons for proposed methods, the mixing molding enables to avoid solvent use while the best deagglomeration and nanoparticle distribution is gained using the electrospinning method. The results of dynamic mechanical analysis (DMA) and nanoindentation revealed that the storage modulus of the composites was higher than that of pure PMMA and increased with nanophosphor content. Surface modification of particles improved the mechanical properties of nanocomposites.
T2  - Journal of mining and metallurgy, Section B: Metallurgy
T1  - Preparation, Characterization and Mechanical Properties of Rare-Earth-Based Nanocomposites
VL  - 48
IS  - 2
SP  - 309
EP  - 318
DO  - 10.2298/JMMB120508030M
ER  - 

@article{
author = "Musbah, S. S. and Radojević, Vesna and Radović, Ivana M. and Uskokovic, P. S. and Stojanović, Danka and Dramićanin, Miroslav and Aleksić, R.",
year = "2012",
abstract = "This study reports research related to different preparation methods and characterization of polymer nanocomposites for optical applications. The Eu-ion doped Gd2O3 nanophosphor powder with different nanoparticle content was embedded in the matrix of PMMA. Preparation was carried out by mixing molding (bulk), electrospinning (nanofibers) and solution casting (thin films) with neat particles and particles coated with AMEO silane. Among the pros and cons for proposed methods, the mixing molding enables to avoid solvent use while the best deagglomeration and nanoparticle distribution is gained using the electrospinning method. The results of dynamic mechanical analysis (DMA) and nanoindentation revealed that the storage modulus of the composites was higher than that of pure PMMA and increased with nanophosphor content. Surface modification of particles improved the mechanical properties of nanocomposites.",
journal = "Journal of mining and metallurgy, Section B: Metallurgy",
title = "Preparation, Characterization and Mechanical Properties of Rare-Earth-Based Nanocomposites",
volume = "48",
number = "2",
pages = "309-318",
doi = "10.2298/JMMB120508030M"
}

Musbah, S. S., Radojević, V., Radović, I. M., Uskokovic, P. S., Stojanović, D., Dramićanin, M.,& Aleksić, R.. (2012). Preparation, Characterization and Mechanical Properties of Rare-Earth-Based Nanocomposites. in Journal of mining and metallurgy, Section B: Metallurgy, 48(2), 309-318.
https://doi.org/10.2298/JMMB120508030M

Musbah SS, Radojević V, Radović IM, Uskokovic PS, Stojanović D, Dramićanin M, Aleksić R. Preparation, Characterization and Mechanical Properties of Rare-Earth-Based Nanocomposites. in Journal of mining and metallurgy, Section B: Metallurgy. 2012;48(2):309-318.
doi:10.2298/JMMB120508030M .

Musbah, S. S., Radojević, Vesna, Radović, Ivana M., Uskokovic, P. S., Stojanović, Danka, Dramićanin, Miroslav, Aleksić, R., "Preparation, Characterization and Mechanical Properties of Rare-Earth-Based Nanocomposites" in Journal of mining and metallurgy, Section B: Metallurgy, 48, no. 2 (2012):309-318,
https://doi.org/10.2298/JMMB120508030M . .

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 . .