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  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7157
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.
PB  - MDPI
T2  - Polymers
T1  - Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior
IS  - 2
SP  - 278
VL  - 16
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.",
publisher = "MDPI",
journal = "Polymers",
title = "Influence of Novel SrTiO3/MnO2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior",
number = "2",
pages = "278",
volume = "16",
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
MDPI., 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  - 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  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5296
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.
PB  - MDPI
T2  - Fractal and Fractional
T1  - Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †
IS  - 12
SP  - 741
VL  - 6
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.",
publisher = "MDPI",
journal = "Fractal and Fractional",
title = "Microstructure of Epoxy-Based Composites: Fractal Nature Analysis †",
number = "12",
pages = "741",
volume = "6",
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
MDPI., 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  - Radović, Ivana
AU  - Stajčić, Aleksandar
AU  - Radisavljević, Anđela
AU  - Veljković, Filip M.
AU  - Čebela, Maria
AU  - Mitić, Vojislav V.
AU  - Radojević, Vesna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4435
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.
PB  - Elsevier Science Sa, Lausanne
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 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.",
publisher = "Elsevier Science Sa, Lausanne",
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., 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
Elsevier Science Sa, Lausanne., 256.
https://doi.org/10.1016/j.matchemphys.2020.123761

Radović I, 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, 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  - Stajčić, Aleksandar
AU  - Radović, Ivana
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4131
AB  - This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites
EP  - 283
IS  - 3
SP  - 277
VL  - 51
DO  - 10.2298/SOS1903277S
ER  - 

@article{
author = "Stajčić, Aleksandar and Radović, Ivana and Ćosović, Vladan and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2019",
abstract = "This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites",
pages = "283-277",
number = "3",
volume = "51",
doi = "10.2298/SOS1903277S"
}

Stajčić, A., Radović, I., Ćosović, V., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2019). The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(3), 277-283.
https://doi.org/10.2298/SOS1903277S

Stajčić A, Radović I, Ćosović V, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites. in Science of Sintering. 2019;51(3):277-283.
doi:10.2298/SOS1903277S .

Stajčić, Aleksandar, Radović, Ivana, Ćosović, Vladan, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites" in Science of Sintering, 51, no. 3 (2019):277-283,
https://doi.org/10.2298/SOS1903277S . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Panić, Vesna
AU  - Radović, Ivana
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3938
AB  - This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Adsorption kinetics of polyethersulfone membrane-supported hydrogels
EP  - 49
SP  - 43
VL  - 131
DO  - 10.5004/dwt.2018.22959
ER  - 

@article{
author = "Stajčić, Aleksandar and Nedeljković, Dragutin and Panić, Vesna and Radović, Ivana and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Adsorption kinetics of polyethersulfone membrane-supported hydrogels",
pages = "49-43",
volume = "131",
doi = "10.5004/dwt.2018.22959"
}

Stajčić, A., Nedeljković, D., Panić, V., Radović, I., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2018). Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 131, 43-49.
https://doi.org/10.5004/dwt.2018.22959

Stajčić A, Nedeljković D, Panić V, Radović I, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment. 2018;131:43-49.
doi:10.5004/dwt.2018.22959 .

Stajčić, Aleksandar, Nedeljković, Dragutin, Panić, Vesna, Radović, Ivana, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "Adsorption kinetics of polyethersulfone membrane-supported hydrogels" in Desalination and Water Treatment, 131 (2018):43-49,
https://doi.org/10.5004/dwt.2018.22959 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nastasović, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Marković, Jelena P.
AU  - Onjia, Antonije
AU  - Radovanović, Filip
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2917
AB  - Polyethersulfone membranes with integrated negatively-charged hydrogel of crosslinked poly (acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a liquid phase inversion process with photopolymerization and crosslinking of functional monomers included in the casting solution. A designed experiment was conducted to select the optimal composition for preparing membranes with a sufficient degree of swelling and ion exchange capacity. Scanning electron microscopy images revealed an ultrafine hybrid structure with an interconnected network of submicron particles embedded within the microporous polyethersulfone support. An intramembrane diffusion model was used to describe kinetics of heavy metal sorption by these hydrogels and the calculated apparent diffusion coefficients were 2-3 times larger than in commercial ion-exchange resins. Equilibrium sorption of heavy metals was described using a semi-empirical Langmuir model.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Environmental Chemical Engineering
T1  - Novel membrane-supported hydrogel for removal of heavy metals
EP  - 461
IS  - 1
SP  - 453
VL  - 3
DO  - 10.1016/j.jece.2015.01.005
ER  - 

@article{
author = "Stajčić, Aleksandar and Nastasović, Aleksandra and Stajić-Trošić, Jasna and Marković, Jelena P. and Onjia, Antonije and Radovanović, Filip",
year = "2015",
abstract = "Polyethersulfone membranes with integrated negatively-charged hydrogel of crosslinked poly (acrylamido-2-methylpropane sulfonic acid) were prepared by a combination of a liquid phase inversion process with photopolymerization and crosslinking of functional monomers included in the casting solution. A designed experiment was conducted to select the optimal composition for preparing membranes with a sufficient degree of swelling and ion exchange capacity. Scanning electron microscopy images revealed an ultrafine hybrid structure with an interconnected network of submicron particles embedded within the microporous polyethersulfone support. An intramembrane diffusion model was used to describe kinetics of heavy metal sorption by these hydrogels and the calculated apparent diffusion coefficients were 2-3 times larger than in commercial ion-exchange resins. Equilibrium sorption of heavy metals was described using a semi-empirical Langmuir model.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Environmental Chemical Engineering",
title = "Novel membrane-supported hydrogel for removal of heavy metals",
pages = "461-453",
number = "1",
volume = "3",
doi = "10.1016/j.jece.2015.01.005"
}

Stajčić, A., Nastasović, A., Stajić-Trošić, J., Marković, J. P., Onjia, A.,& Radovanović, F.. (2015). Novel membrane-supported hydrogel for removal of heavy metals. in Journal of Environmental Chemical Engineering
Elsevier Sci Ltd, Oxford., 3(1), 453-461.
https://doi.org/10.1016/j.jece.2015.01.005

Stajčić A, Nastasović A, Stajić-Trošić J, Marković JP, Onjia A, Radovanović F. Novel membrane-supported hydrogel for removal of heavy metals. in Journal of Environmental Chemical Engineering. 2015;3(1):453-461.
doi:10.1016/j.jece.2015.01.005 .

Stajčić, Aleksandar, Nastasović, Aleksandra, Stajić-Trošić, Jasna, Marković, Jelena P., Onjia, Antonije, Radovanović, Filip, "Novel membrane-supported hydrogel for removal of heavy metals" in Journal of Environmental Chemical Engineering, 3, no. 1 (2015):453-461,
https://doi.org/10.1016/j.jece.2015.01.005 . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stevanović, Marija P.
AU  - Stijepović, Mirko
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stevanović, Jasmina
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3063
AB  - The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solutiondiffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NS/ and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive.
PB  - Savez hemijskih inženjera, Beograd
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation
EP  - 284
IS  - 2
SP  - 277
VL  - 21
DO  - 10.2298/CICEQ130924025N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stevanović, Marija P. and Stijepović, Mirko and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Stevanović, Jasmina",
year = "2015",
abstract = "The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solutiondiffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NS/ and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation",
pages = "284-277",
number = "2",
volume = "21",
doi = "10.2298/CICEQ130924025N"
}

Nedeljković, D., Stevanović, M. P., Stijepović, M., Stajčić, A., Grujić, A., Stajić-Trošić, J.,& Stevanović, J.. (2015). The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry & Chemical Engineering Quarterly
Savez hemijskih inženjera, Beograd., 21(2), 277-284.
https://doi.org/10.2298/CICEQ130924025N

Nedeljković D, Stevanović MP, Stijepović M, Stajčić A, Grujić A, Stajić-Trošić J, Stevanović J. The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry & Chemical Engineering Quarterly. 2015;21(2):277-284.
doi:10.2298/CICEQ130924025N .

Nedeljković, Dragutin, Stevanović, Marija P., Stijepović, Mirko, Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Stevanović, Jasmina, "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation" in Chemical Industry & Chemical Engineering Quarterly, 21, no. 2 (2015):277-284,
https://doi.org/10.2298/CICEQ130924025N . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2865
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7.
AB  - Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation
T1  - Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida
EP  - 222
IS  - 2
SP  - 216
VL  - 70
DO  - 10.5937/tehnika1502216N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna",
year = "2015",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7., Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation, Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida",
pages = "222-216",
number = "2",
volume = "70",
doi = "10.5937/tehnika1502216N"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stijepović, M.,& Stajić-Trošić, J.. (2015). The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 70(2), 216-222.
https://doi.org/10.5937/tehnika1502216N

Nedeljković D, Stajčić A, Grujić A, Stijepović M, Stajić-Trošić J. The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika. 2015;70(2):216-222.
doi:10.5937/tehnika1502216N .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation" in Tehnika, 70, no. 2 (2015):216-222,
https://doi.org/10.5937/tehnika1502216N . .

TY  - JOUR
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Žák, Tomáš
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2585
AB  - Polymer bonded magnets are contemporary materials with a very large range of applications. The objective of this study is to assess how different content of Nd-Fe-B and/or barium ferrite particles affect on magnetic and morphological properties of bonded composite materials. Interactions between employed magnetic powders and interactions between magnetic powders and polymer binder are considered. For examination of the magnetic behavior Vibrating Sample Magnetometer (VSM) is used. Different shape and size of obtained hysteresis loops are used for comparison and prediction of polymer bonded materials properties.
AB  - Polimerom vezani magneti predstavljaju savremene materijale sa veoma širokim spektrom primene. Cilj ovog rada je da se analizira i prikaže kako različiti udeli čestica Nd-Fe-B i/ili barijum ferita utiču na magnetna i morfološka svojstva bonded kompozitnih materijala. Razmatrane su interakcije između primenjenih magnetnih prahova različitog tipa i interakcije između magnetnih prahova i polimerne matrice. Za merenje magnetnih svojstava kompozita korišćen je vibracioni magnetometar (VSM). Različiti oblici i veličine dobijenih histerezisnih petlji su poređeni i analizirani u cilju predviđanja magnetnog ponašanja kompozita.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Magnetic behaviour of hybrid magnetic composite materials
T1  - Magnetno ponašanje hibridnih magnetnih kompozitnih materijala
EP  - 172
IS  - 2
SP  - 170
VL  - 55
DO  - 10.5937/ZasMat1402170S
ER  - 

@article{
author = "Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko and Nedeljković, Dragutin and Stajčić, Aleksandar and Žák, Tomáš",
year = "2014",
abstract = "Polymer bonded magnets are contemporary materials with a very large range of applications. The objective of this study is to assess how different content of Nd-Fe-B and/or barium ferrite particles affect on magnetic and morphological properties of bonded composite materials. Interactions between employed magnetic powders and interactions between magnetic powders and polymer binder are considered. For examination of the magnetic behavior Vibrating Sample Magnetometer (VSM) is used. Different shape and size of obtained hysteresis loops are used for comparison and prediction of polymer bonded materials properties., Polimerom vezani magneti predstavljaju savremene materijale sa veoma širokim spektrom primene. Cilj ovog rada je da se analizira i prikaže kako različiti udeli čestica Nd-Fe-B i/ili barijum ferita utiču na magnetna i morfološka svojstva bonded kompozitnih materijala. Razmatrane su interakcije između primenjenih magnetnih prahova različitog tipa i interakcije između magnetnih prahova i polimerne matrice. Za merenje magnetnih svojstava kompozita korišćen je vibracioni magnetometar (VSM). Različiti oblici i veličine dobijenih histerezisnih petlji su poređeni i analizirani u cilju predviđanja magnetnog ponašanja kompozita.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Magnetic behaviour of hybrid magnetic composite materials, Magnetno ponašanje hibridnih magnetnih kompozitnih materijala",
pages = "172-170",
number = "2",
volume = "55",
doi = "10.5937/ZasMat1402170S"
}

Stajić-Trošić, J., Grujić, A., Stijepović, M., Nedeljković, D., Stajčić, A.,& Žák, T.. (2014). Magnetic behaviour of hybrid magnetic composite materials. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 55(2), 170-172.
https://doi.org/10.5937/ZasMat1402170S

Stajić-Trošić J, Grujić A, Stijepović M, Nedeljković D, Stajčić A, Žák T. Magnetic behaviour of hybrid magnetic composite materials. in Zaštita materijala. 2014;55(2):170-172.
doi:10.5937/ZasMat1402170S .

Stajić-Trošić, Jasna, Grujić, Aleksandar, Stijepović, Mirko, Nedeljković, Dragutin, Stajčić, Aleksandar, Žák, Tomáš, "Magnetic behaviour of hybrid magnetic composite materials" in Zaštita materijala, 55, no. 2 (2014):170-172,
https://doi.org/10.5937/ZasMat1402170S . .

TY  - CONF
AU  - Stajčić, Aleksandar
AU  - Radovanović, Filip
AU  - Nastasović, Aleksandra
AU  - Stajić-Trošić, Jasna
AU  - Marković, Jelena
AU  - Onjia, Antonije
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2274
AB  - Hydrogels containing strong acid groups have been used in the past for the removal of heavy metals. Unfortunately such hydrogels exhibit poor mechanical properties and are generally difficult to handle. In this work we prepared asymmetric membranes incorporatingcross-linked 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) hydrogel by combining photopolymerization and liquid phase inversion. An experimental design measuring water content and ion-exchange capacity of these membranes was used to select the optimal membrane composition for the removal of Pb2+, Ni2+, and Cd2+ ions from aqueous solutions. The results demonstrated fast sorption kinetics and high capacity for the investigated metals.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
T1  - Asymmetric hydrogel membranes for heavy metal adsorption
EP  - 40
SP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7536
ER  - 

@conference{
author = "Stajčić, Aleksandar and Radovanović, Filip and Nastasović, Aleksandra and Stajić-Trošić, Jasna and Marković, Jelena and Onjia, Antonije",
year = "2013",
abstract = "Hydrogels containing strong acid groups have been used in the past for the removal of heavy metals. Unfortunately such hydrogels exhibit poor mechanical properties and are generally difficult to handle. In this work we prepared asymmetric membranes incorporatingcross-linked 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) hydrogel by combining photopolymerization and liquid phase inversion. An experimental design measuring water content and ion-exchange capacity of these membranes was used to select the optimal membrane composition for the removal of Pb2+, Ni2+, and Cd2+ ions from aqueous solutions. The results demonstrated fast sorption kinetics and high capacity for the investigated metals.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng",
title = "Asymmetric hydrogel membranes for heavy metal adsorption",
pages = "40-40",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7536"
}

Stajčić, A., Radovanović, F., Nastasović, A., Stajić-Trošić, J., Marković, J.,& Onjia, A.. (2013). Asymmetric hydrogel membranes for heavy metal adsorption. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng
Belgrade : Institute of Technical Sciences of SASA., 40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7536

Stajčić A, Radovanović F, Nastasović A, Stajić-Trošić J, Marković J, Onjia A. Asymmetric hydrogel membranes for heavy metal adsorption. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng. 2013;:40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7536 .

Stajčić, Aleksandar, Radovanović, Filip, Nastasović, Aleksandra, Stajić-Trošić, Jasna, Marković, Jelena, Onjia, Antonije, "Asymmetric hydrogel membranes for heavy metal adsorption" in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Eng (2013):40-40,
https://hdl.handle.net/21.15107/rcub_vinar_7536 .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Stevanović, Jasmina
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2278
AB  - Various types and contents of magnetic powder and polymer matrix induce different mechanical, magnetic, electrical and optical properties of final composite material. The strong influence of relatively small amounts of filler particles on the dynamic mechanical properties of polymers has significantly contributed to increased use of polymer materials in many commercial applications. The higher content of magnetic filler has direct influence on magnetic properties of composites, but also may change the rheology of polymer melt during process and, subsequently, impact the mechanical strength of bonded magnets. For better insight into viscoelastic behaviour of composites, beside experiments, a theory that explicitly takes the shape factor, particle distribution, particle-particle interactions as well as particle-polymer matrix interactions into account is required. The mathematical prediction of storage modulus behaviour is examined. The several proposed analytical models are tested versus experimental results. Some of applied models agree very well with experimental data, whilst others deviate significantly.
AB  - Različite vrste primenjenih magnetnih prahova i polimerne matrice, kao i njihovi udeli, utiču na mehanička, magnetna, električna i optička svojstva finalnog kompozitnog materijala. Veliki uticaj relativno malih udela čestica punioca na dinamičko mehanička svojstva polimera značajno doprinosi većoj komercijalnoj upotrebi kompozitnih materijala. Veliki udeli magnetnog praha u mnogome utiču na magnetna svojstva kompozita, ali takođe mogu dovesti do reoloških promena u polimeru tokom procesa topljenja, što ima direktan uticaj na mehanička svojstva polimerom vezanih (bonded) magneta. Radi boljeg uvida u visokoelastična svojstva kompozita, osim eksperimenata, neophodno je uzeti u obzir i teorijska razmatranja koja eksplicitno objašnjavaju uticaj faktora oblika, raspodelu čestica, interakcije između čestica, kao i interakcije između čestica i polimera. U tom smislu vršeno je i matematičko predviđanje ponašanja modula uskladištene energije (E') kompozita. Nekoliko predloženih analitičkih modela su testirani i upoređeni sa eksperimentalnim rezultatima. Neki od primenjenih modela se veoma dobro slažu sa dobijenim eksperimentalnim rezultatima, dok neki značajno odstupaju.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Polymer bonded magnetic composites based on Nd-Fe-B
T1  - Polimerni magnetni kompoziti na bazi Nd-Fe-B
EP  - 365
IS  - 4
SP  - 361
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2278
ER  - 

@article{
author = "Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko and Nedeljković, Dragutin and Stajčić, Aleksandar and Stevanović, Jasmina",
year = "2013",
abstract = "Various types and contents of magnetic powder and polymer matrix induce different mechanical, magnetic, electrical and optical properties of final composite material. The strong influence of relatively small amounts of filler particles on the dynamic mechanical properties of polymers has significantly contributed to increased use of polymer materials in many commercial applications. The higher content of magnetic filler has direct influence on magnetic properties of composites, but also may change the rheology of polymer melt during process and, subsequently, impact the mechanical strength of bonded magnets. For better insight into viscoelastic behaviour of composites, beside experiments, a theory that explicitly takes the shape factor, particle distribution, particle-particle interactions as well as particle-polymer matrix interactions into account is required. The mathematical prediction of storage modulus behaviour is examined. The several proposed analytical models are tested versus experimental results. Some of applied models agree very well with experimental data, whilst others deviate significantly., Različite vrste primenjenih magnetnih prahova i polimerne matrice, kao i njihovi udeli, utiču na mehanička, magnetna, električna i optička svojstva finalnog kompozitnog materijala. Veliki uticaj relativno malih udela čestica punioca na dinamičko mehanička svojstva polimera značajno doprinosi većoj komercijalnoj upotrebi kompozitnih materijala. Veliki udeli magnetnog praha u mnogome utiču na magnetna svojstva kompozita, ali takođe mogu dovesti do reoloških promena u polimeru tokom procesa topljenja, što ima direktan uticaj na mehanička svojstva polimerom vezanih (bonded) magneta. Radi boljeg uvida u visokoelastična svojstva kompozita, osim eksperimenata, neophodno je uzeti u obzir i teorijska razmatranja koja eksplicitno objašnjavaju uticaj faktora oblika, raspodelu čestica, interakcije između čestica, kao i interakcije između čestica i polimera. U tom smislu vršeno je i matematičko predviđanje ponašanja modula uskladištene energije (E') kompozita. Nekoliko predloženih analitičkih modela su testirani i upoređeni sa eksperimentalnim rezultatima. Neki od primenjenih modela se veoma dobro slažu sa dobijenim eksperimentalnim rezultatima, dok neki značajno odstupaju.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Polymer bonded magnetic composites based on Nd-Fe-B, Polimerni magnetni kompoziti na bazi Nd-Fe-B",
pages = "365-361",
number = "4",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2278"
}

Grujić, A., Stajić-Trošić, J., Stijepović, M., Nedeljković, D., Stajčić, A.,& Stevanović, J.. (2013). Polymer bonded magnetic composites based on Nd-Fe-B. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 54(4), 361-365.
https://hdl.handle.net/21.15107/rcub_technorep_2278

Grujić A, Stajić-Trošić J, Stijepović M, Nedeljković D, Stajčić A, Stevanović J. Polymer bonded magnetic composites based on Nd-Fe-B. in Zaštita materijala. 2013;54(4):361-365.
https://hdl.handle.net/21.15107/rcub_technorep_2278 .

Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko, Nedeljković, Dragutin, Stajčić, Aleksandar, Stevanović, Jasmina, "Polymer bonded magnetic composites based on Nd-Fe-B" in Zaštita materijala, 54, no. 4 (2013):361-365,
https://hdl.handle.net/21.15107/rcub_technorep_2278 .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
AU  - Putić, Slaviša
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Aleksić, Radoslav
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2208
AB  - Magnetic composite materials with varied content of Nd-Fe-B particles in epoxy matrix are examined from a dynamic mechanical perspective. Structural, viscoelastic and magnetic properties of composites have been observed using Scanning Electron Microscope (SEM), Dynamic Mechanical Analysis (DMA) and Super Quantum Interference Device (SQUID) magnetometer, respectively. Experimental results show that magnetic properties and corresponding dynamic mechanical behaviour depend on packing density. Also, results observed by predictive mathematical models suggest that maximal packing factor has a direct impact on elastic behaviour of composites. [doi:10.2320/matertrans.M2011218]
PB  - Japan Inst Metals, Sendai
T2  - Materials Transactions
T1  - Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials
EP  - 400
IS  - 2
SP  - 395
VL  - 53
DO  - 10.2320/matertrans.M2011218
ER  - 

@article{
author = "Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna and Putić, Slaviša and Nedeljković, Dragutin and Stajčić, Aleksandar and Aleksić, Radoslav",
year = "2012",
abstract = "Magnetic composite materials with varied content of Nd-Fe-B particles in epoxy matrix are examined from a dynamic mechanical perspective. Structural, viscoelastic and magnetic properties of composites have been observed using Scanning Electron Microscope (SEM), Dynamic Mechanical Analysis (DMA) and Super Quantum Interference Device (SQUID) magnetometer, respectively. Experimental results show that magnetic properties and corresponding dynamic mechanical behaviour depend on packing density. Also, results observed by predictive mathematical models suggest that maximal packing factor has a direct impact on elastic behaviour of composites. [doi:10.2320/matertrans.M2011218]",
publisher = "Japan Inst Metals, Sendai",
journal = "Materials Transactions",
title = "Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials",
pages = "400-395",
number = "2",
volume = "53",
doi = "10.2320/matertrans.M2011218"
}

Grujić, A., Stijepović, M., Stajić-Trošić, J., Putić, S., Nedeljković, D., Stajčić, A.,& Aleksić, R.. (2012). Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials. in Materials Transactions
Japan Inst Metals, Sendai., 53(2), 395-400.
https://doi.org/10.2320/matertrans.M2011218

Grujić A, Stijepović M, Stajić-Trošić J, Putić S, Nedeljković D, Stajčić A, Aleksić R. Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials. in Materials Transactions. 2012;53(2):395-400.
doi:10.2320/matertrans.M2011218 .

Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, Putić, Slaviša, Nedeljković, Dragutin, Stajčić, Aleksandar, Aleksić, Radoslav, "Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials" in Materials Transactions, 53, no. 2 (2012):395-400,
https://doi.org/10.2320/matertrans.M2011218 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Lazić, Nada L.
AU  - Žák, Tomáš
AU  - Aleksić, Radoslav
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2100
AB  - Lately, there has been great attention paid to the research of bonded hybrid composites with improved dynamic mechanical capacities capable of replacing bonded Nd-Fe-B magnetic materials, by using cheaper (ferrite) materials instead of the Nd-Fe-B powder while retaining the satisfying values of the maximum magnetic energy. The objective of this study is to assess how different contents of Nd-Fe-B and/or barium ferrite particles can affect morphological, dynamic mechanical and magnetic properties of bonded composite materials. The interactions between employed magnetic powders and the interactions between magnetic powders and polymer binder are considered. For the examination of the magnetic behaviour, a vibrating sample magnetometer (VSM) is used. Different shapes and sizes of the obtained hysteresis loops are used for comparison and prediction of the polymer bonded materials properties. The homogeneous distribution of the magnetic particles in the polymer matrix is validated using scanning electron microscopy (SEM). The elastic and damping behavior examined by dynamic mechanical analysis (DMA) show improved properties for hybrid composite materials.
AB  - Istraživački trend u oblasti polimerom vezanih (bonded) Nd-Fe-B magnetnih materijala se reflektuje kroz razvoj bonded hibridnih kompozita sa poboljšanim dinamičko-mehaničkim svojstvima i primetno nižoj ceni zbog zamene skupe Nd- Fe-B legure jeftinijim magnetnim materijalima (ferit) uz postizanje zadovoljavajućih vrednosti maksimalne magnetne energije. Cilj ovog rada je da ukaže i predvidi uticaj različitog sadržaja Nd-Fe-B i/ili barijum feritnih čestica na morfološka, dinamičko mehanička i magnetna svojstava bonded magneta. Posmatrane su i analizirane interakcije između magnetnih prahova, kao i interakcije između magnetnih prahova i polimernog veziva i njihov uticaj na finalna svojstva bonded magneta. Za ispitivanje magnetnog ponašanja korišćen je vibraconi magnetometar (VSM). Različite veličine i oblici dobijenih histerezisnih krivih su poređeni i korišćeni za predviđanje svojstava ispitivanih kompozitnih materijala. Homogena raspodela magnetnih čestica u polimernoj matrici je potvrđena korišćenjem skenirajućeg elektronskog mikroskopa (SEM). Elastična svojstva i svojstvo prigušenja oscilacija ispitivano je korišćenjem dinamičko mehaničke analize (DMA) koja ukazuje na poboljšana svojstva kod hibridnih kompozita.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix
T1  - Hibdridni Nd-Fe-B/barijum-ferit magnetni materijali sa epoksi matricom
EP  - 308
IS  - 3
SP  - 301
VL  - 66
DO  - 10.2298/HEMIND111104098S
ER  - 

@article{
author = "Stajčić, Aleksandar and Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko and Lazić, Nada L. and Žák, Tomáš and Aleksić, Radoslav",
year = "2012",
abstract = "Lately, there has been great attention paid to the research of bonded hybrid composites with improved dynamic mechanical capacities capable of replacing bonded Nd-Fe-B magnetic materials, by using cheaper (ferrite) materials instead of the Nd-Fe-B powder while retaining the satisfying values of the maximum magnetic energy. The objective of this study is to assess how different contents of Nd-Fe-B and/or barium ferrite particles can affect morphological, dynamic mechanical and magnetic properties of bonded composite materials. The interactions between employed magnetic powders and the interactions between magnetic powders and polymer binder are considered. For the examination of the magnetic behaviour, a vibrating sample magnetometer (VSM) is used. Different shapes and sizes of the obtained hysteresis loops are used for comparison and prediction of the polymer bonded materials properties. The homogeneous distribution of the magnetic particles in the polymer matrix is validated using scanning electron microscopy (SEM). The elastic and damping behavior examined by dynamic mechanical analysis (DMA) show improved properties for hybrid composite materials., Istraživački trend u oblasti polimerom vezanih (bonded) Nd-Fe-B magnetnih materijala se reflektuje kroz razvoj bonded hibridnih kompozita sa poboljšanim dinamičko-mehaničkim svojstvima i primetno nižoj ceni zbog zamene skupe Nd- Fe-B legure jeftinijim magnetnim materijalima (ferit) uz postizanje zadovoljavajućih vrednosti maksimalne magnetne energije. Cilj ovog rada je da ukaže i predvidi uticaj različitog sadržaja Nd-Fe-B i/ili barijum feritnih čestica na morfološka, dinamičko mehanička i magnetna svojstava bonded magneta. Posmatrane su i analizirane interakcije između magnetnih prahova, kao i interakcije između magnetnih prahova i polimernog veziva i njihov uticaj na finalna svojstva bonded magneta. Za ispitivanje magnetnog ponašanja korišćen je vibraconi magnetometar (VSM). Različite veličine i oblici dobijenih histerezisnih krivih su poređeni i korišćeni za predviđanje svojstava ispitivanih kompozitnih materijala. Homogena raspodela magnetnih čestica u polimernoj matrici je potvrđena korišćenjem skenirajućeg elektronskog mikroskopa (SEM). Elastična svojstva i svojstvo prigušenja oscilacija ispitivano je korišćenjem dinamičko mehaničke analize (DMA) koja ukazuje na poboljšana svojstva kod hibridnih kompozita.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix, Hibdridni Nd-Fe-B/barijum-ferit magnetni materijali sa epoksi matricom",
pages = "308-301",
number = "3",
volume = "66",
doi = "10.2298/HEMIND111104098S"
}

Stajčić, A., Stajić-Trošić, J., Grujić, A., Stijepović, M., Lazić, N. L., Žák, T.,& Aleksić, R.. (2012). Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix. in Hemijska industrija
Association of Chemical Engineers of Serbia., 66(3), 301-308.
https://doi.org/10.2298/HEMIND111104098S

Stajčić A, Stajić-Trošić J, Grujić A, Stijepović M, Lazić NL, Žák T, Aleksić R. Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix. in Hemijska industrija. 2012;66(3):301-308.
doi:10.2298/HEMIND111104098S .

Stajčić, Aleksandar, Stajić-Trošić, Jasna, Grujić, Aleksandar, Stijepović, Mirko, Lazić, Nada L., Žák, Tomáš, Aleksić, Radoslav, "Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix" in Hemijska industrija, 66, no. 3 (2012):301-308,
https://doi.org/10.2298/HEMIND111104098S . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Zrilić, Milorad
AU  - Stevanović, Jasmina
AU  - Drmanić, Saša
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1983
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation
EP  - 278
IS  - 1
SP  - 269
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1983
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Zrilić, Milorad and Stevanović, Jasmina and Drmanić, Saša",
year = "2012",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation",
pages = "278-269",
number = "1",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1983"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stajić-Trošić, J., Zrilić, M., Stevanović, J.,& Drmanić, S.. (2012). The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 7(1), 269-278.
https://hdl.handle.net/21.15107/rcub_technorep_1983

Nedeljković D, Stajčić A, Grujić A, Stajić-Trošić J, Zrilić M, Stevanović J, Drmanić S. The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures. 2012;7(1):269-278.
https://hdl.handle.net/21.15107/rcub_technorep_1983 .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Zrilić, Milorad, Stevanović, Jasmina, Drmanić, Saša, "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation" in Digest Journal of Nanomaterials and Biostructures, 7, no. 1 (2012):269-278,
https://hdl.handle.net/21.15107/rcub_technorep_1983 .