TY  - JOUR
AU  - Mališić, Vanja
AU  - Gajić, Vuk
AU  - Porobić, Slavica
AU  - Patarić, Aleksandra
AU  - Putić, Slaviša
AU  - Vujčić, Ivica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10683
AB  - Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.
T2  - Radiation Physics and Chemistry
T1  - The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing
VL  - 207
SP  - 110846
DO  - 10.1016/j.radphyschem.2023.110846
ER  - 

@article{
author = "Mališić, Vanja and Gajić, Vuk and Porobić, Slavica and Patarić, Aleksandra and Putić, Slaviša and Vujčić, Ivica",
year = "2023",
abstract = "Polymethyl methacrylate (PMMA) is a polymer material widely used in dental applications due to its excellent biocompatibility, stable physicochemical properties, easy manipulation, and low cost. The combination of biocompatible polymers and ceramics has great potential for the development of materials in the dental industry with improved mechanical properties. The addition of Al2O3 nanoparticles to PMMA can significantly improve its compressive and flexural strengths and wear resistance. Since this material is used in dental applications, it requires a high degree of product sterility. This can easily be achieved with gamma radiation treatment. Gamma radiation not only ensures the sterility of the product but can also affects changes in numerous material properties. The aim of this paper is to determine the influence of different doses of gamma radiation on the microbiological purity and changes in the mechanical and thermal properties of the PMMA/Al2O3 composite as well as the microstructural and color changes. It was found that the dose of radiation of 25 kGy is sufficient for complete sterilization of the product. This radiation dose improves the mechanical properties of the material and thermal stability. On the other hand, the dose of 25 kGy does not affect the morphology of the exposed sample and has small effect on the color change.",
journal = "Radiation Physics and Chemistry",
title = "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing",
volume = "207",
pages = "110846",
doi = "10.1016/j.radphyschem.2023.110846"
}

Mališić, V., Gajić, V., Porobić, S., Patarić, A., Putić, S.,& Vujčić, I.. (2023). The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry, 207, 110846.
https://doi.org/10.1016/j.radphyschem.2023.110846

Mališić V, Gajić V, Porobić S, Patarić A, Putić S, Vujčić I. The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing. in Radiation Physics and Chemistry. 2023;207:110846.
doi:10.1016/j.radphyschem.2023.110846 .

Mališić, Vanja, Gajić, Vuk, Porobić, Slavica, Patarić, Aleksandra, Putić, Slaviša, Vujčić, Ivica, "The effect of gamma irradiation on the synthesis, microbiological sterility, and improvement of properties of PMMA-Al2O3 composite used in dental prosthesis manufacturing" in Radiation Physics and Chemistry, 207 (2023):110846,
https://doi.org/10.1016/j.radphyschem.2023.110846 . .

TY  - JOUR
AU  - Mališić, Vanja
AU  - Pezo, Milada
AU  - Jelić, Aleksandra
AU  - Patarić, Aleksandra
AU  - Putić, Slaviša
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12281
AB  - Poly(methyl methacrylate) (PMMA) has a broad spectrum of uses, especially in medical applications. The role of fine-grained alumina particles of PMMA composites was investigated in this study. The composites were based on PMMA modified with dimethyl itaconate (DMI) as a matrix and alumina particles (Al2O3) and alumina doped with iron (Al2O3-Fe) modified with 3-aminopropyl-trimethoxysilane (AM) and flax oil fatty acid methyl esters (biodiesel) as reinforcements. Three particle sizes were measured (~0.4, ~0.6 and ~1.2 μm). The highest thermal conductivity values were measured for the composite 5 wt.% Al2O3-Fe-AM. With the addition of 3 wt.% Al2O3-AM to the PMMA/DMI matrix, mechanical properties were improved (tensile strength, strain, and modulus of elasticity). An artificial neural network model based on the Broyden-Fletcher-Goldfarb-Shanno iterative algorithm was investigated for prediction of thermal conductivity and mechanical properties of the composites showing satisfactory results. This is relevant for applications for optimization of dental materials to produce dentures, which were exposed to variations in temperature during the application.
AB  - Poli (metil metakrilata) (PMMA) ima široku upotrebu, posebno u stomatologiji i medicini. Kompoziti su napravljeni od PMMA modifikovanog dimetil itakonatom (DMI) kao matrice. Kao pojačanje korišćene su čestice glinice (Al2O3) i glinice dopirane oksidom gvožđa (Al2O3-Fe) modifikovanim sa 3-aminopropiltrimetoksilanom (AM) i metil estrima masnih kiselina lanenog ulja (biodizel – BD). Prema merenjima toplotne provodljivosti, najveće vrednosti toplotne provodljivosti imao je kompozit sa česticama glinice 5 wt.% Al2O3-Fe-AM. Dodatkom modifikovanih čestica glinice u PMMA/DMI matricu, poboljšane su mehaničke osobine (zatezna čvrstoća, deformacija i modul elastičnosti). Razvijen je model veštačke neuronske mreže zasnovan na iterativnom algoritmu predloženom u literaturi (Broiden-FletcherGoldfarb-Shanno), za predviđanje toplotne provodljivosti i mehaničkih svojstava kompozita na bazi akrilata u kombinaciji sa česticama na bazi glinice, u zavisnosti od masenog udela čestica, i dodatka oksida gvožđa i modifikatora. Pokazano je da ovi matematički modeli mogu predvideti mehanička i termička svojstva kompozitnih materijala. Ovo je posebno relevantno za predviđanje toplotne provodljivosti materijala koji se koriste u stomatologiji za izradu proteza i koji su izloženi temperaturnim promenama tokom primene.
T2  - Hemijska industrija
T1  - Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling
T1  - Predviđanje termičkih i mehaničkih svojstava kompozita na bazi akrilata korišćenjem modela veštačke neuronske mreže
VL  - 77
IS  - 4
SP  - 293
EP  - 300
DO  - 10.2298/HEMIND230119029M
ER  - 

@article{
author = "Mališić, Vanja and Pezo, Milada and Jelić, Aleksandra and Patarić, Aleksandra and Putić, Slaviša",
year = "2023",
abstract = "Poly(methyl methacrylate) (PMMA) has a broad spectrum of uses, especially in medical applications. The role of fine-grained alumina particles of PMMA composites was investigated in this study. The composites were based on PMMA modified with dimethyl itaconate (DMI) as a matrix and alumina particles (Al2O3) and alumina doped with iron (Al2O3-Fe) modified with 3-aminopropyl-trimethoxysilane (AM) and flax oil fatty acid methyl esters (biodiesel) as reinforcements. Three particle sizes were measured (~0.4, ~0.6 and ~1.2 μm). The highest thermal conductivity values were measured for the composite 5 wt.% Al2O3-Fe-AM. With the addition of 3 wt.% Al2O3-AM to the PMMA/DMI matrix, mechanical properties were improved (tensile strength, strain, and modulus of elasticity). An artificial neural network model based on the Broyden-Fletcher-Goldfarb-Shanno iterative algorithm was investigated for prediction of thermal conductivity and mechanical properties of the composites showing satisfactory results. This is relevant for applications for optimization of dental materials to produce dentures, which were exposed to variations in temperature during the application., Poli (metil metakrilata) (PMMA) ima široku upotrebu, posebno u stomatologiji i medicini. Kompoziti su napravljeni od PMMA modifikovanog dimetil itakonatom (DMI) kao matrice. Kao pojačanje korišćene su čestice glinice (Al2O3) i glinice dopirane oksidom gvožđa (Al2O3-Fe) modifikovanim sa 3-aminopropiltrimetoksilanom (AM) i metil estrima masnih kiselina lanenog ulja (biodizel – BD). Prema merenjima toplotne provodljivosti, najveće vrednosti toplotne provodljivosti imao je kompozit sa česticama glinice 5 wt.% Al2O3-Fe-AM. Dodatkom modifikovanih čestica glinice u PMMA/DMI matricu, poboljšane su mehaničke osobine (zatezna čvrstoća, deformacija i modul elastičnosti). Razvijen je model veštačke neuronske mreže zasnovan na iterativnom algoritmu predloženom u literaturi (Broiden-FletcherGoldfarb-Shanno), za predviđanje toplotne provodljivosti i mehaničkih svojstava kompozita na bazi akrilata u kombinaciji sa česticama na bazi glinice, u zavisnosti od masenog udela čestica, i dodatka oksida gvožđa i modifikatora. Pokazano je da ovi matematički modeli mogu predvideti mehanička i termička svojstva kompozitnih materijala. Ovo je posebno relevantno za predviđanje toplotne provodljivosti materijala koji se koriste u stomatologiji za izradu proteza i koji su izloženi temperaturnim promenama tokom primene.",
journal = "Hemijska industrija",
title = "Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling, Predviđanje termičkih i mehaničkih svojstava kompozita na bazi akrilata korišćenjem modela veštačke neuronske mreže",
volume = "77",
number = "4",
pages = "293-300",
doi = "10.2298/HEMIND230119029M"
}

Mališić, V., Pezo, M., Jelić, A., Patarić, A.,& Putić, S.. (2023). Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling. in Hemijska industrija, 77(4), 293-300.
https://doi.org/10.2298/HEMIND230119029M

Mališić V, Pezo M, Jelić A, Patarić A, Putić S. Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling. in Hemijska industrija. 2023;77(4):293-300.
doi:10.2298/HEMIND230119029M .

Mališić, Vanja, Pezo, Milada, Jelić, Aleksandra, Patarić, Aleksandra, Putić, Slaviša, "Prediction of thermal and mechanical properties of acrylate-based composites using artificial neural network modeling" in Hemijska industrija, 77, no. 4 (2023):293-300,
https://doi.org/10.2298/HEMIND230119029M . .

TY  - JOUR
AU  - Mališić, Vanja
AU  - Tomić, Nataša
AU  - Vuksanović, Marija M.
AU  - Balanc, Bojana
AU  - Stević, Zoran
AU  - Marinković, Aleksandar D.
AU  - Jančić-Heinemann, Radmila
AU  - Putić, Slaviša
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8923
AB  - Thermal properties of acrylate-based composite combined with alumina-based particles were investigated. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD) were used as reinforcement. Thermal conductivity measurements showed that composite with alumina particles with the highest alpha phase content had the highest thermal conductivity values. Mechanical properties (tensile strength, modulus of elasticity and elongation at break) were improved by the addition of modified alumina particles to PMMA/DMI matrix. The thermal properties are the most improved for composite with 3 wt.% Al2O3-Fe-AM particles that had the lowest temperature in a crack zone was noticed (10.28 %) compared to PMMA added due to the better stiffness and highest thermal conductivity.
T2  - Science of Sintering
T1  - An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles
VL  - 52
IS  - 4
SP  - 457
EP  - 467
DO  - 10.2298/SOS2004457M
ER  - 

@article{
author = "Mališić, Vanja and Tomić, Nataša and Vuksanović, Marija M. and Balanc, Bojana and Stević, Zoran and Marinković, Aleksandar D. and Jančić-Heinemann, Radmila and Putić, Slaviša",
year = "2020",
abstract = "Thermal properties of acrylate-based composite combined with alumina-based particles were investigated. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD) were used as reinforcement. Thermal conductivity measurements showed that composite with alumina particles with the highest alpha phase content had the highest thermal conductivity values. Mechanical properties (tensile strength, modulus of elasticity and elongation at break) were improved by the addition of modified alumina particles to PMMA/DMI matrix. The thermal properties are the most improved for composite with 3 wt.% Al2O3-Fe-AM particles that had the lowest temperature in a crack zone was noticed (10.28 %) compared to PMMA added due to the better stiffness and highest thermal conductivity.",
journal = "Science of Sintering",
title = "An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles",
volume = "52",
number = "4",
pages = "457-467",
doi = "10.2298/SOS2004457M"
}

Mališić, V., Tomić, N., Vuksanović, M. M., Balanc, B., Stević, Z., Marinković, A. D., Jančić-Heinemann, R.,& Putić, S.. (2020). An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles. in Science of Sintering, 52(4), 457-467.
https://doi.org/10.2298/SOS2004457M

Mališić V, Tomić N, Vuksanović MM, Balanc B, Stević Z, Marinković AD, Jančić-Heinemann R, Putić S. An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles. in Science of Sintering. 2020;52(4):457-467.
doi:10.2298/SOS2004457M .

Mališić, Vanja, Tomić, Nataša, Vuksanović, Marija M., Balanc, Bojana, Stević, Zoran, Marinković, Aleksandar D., Jančić-Heinemann, Radmila, Putić, Slaviša, "An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles" in Science of Sintering, 52, no. 4 (2020):457-467,
https://doi.org/10.2298/SOS2004457M . .