TY  - JOUR
AU  - Putić, Lana
AU  - Stajić-Trošić, Jasna
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Milanović, Jovana
AU  - Pilić, Branka
AU  - Stanković, Snežana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5252
AB  - This study investigates the effect of surface modification by deposition of electrospun fibers on properties and performance of three different microporous polypropylene/polyethylene (PP/PE) commercial nonwoven membrane supports (Novatexx 2430, 2465 and 2473). Polyamide (nylon 6) nanofiber webs with a small number of defects and fibers of about 100 nanometer diameter were successfully deposited onto a surface of the selected membrane supports. FESEM was used to examine microstructure and morphology of the unmodified substrates and the prepared composite two-layer membranes. DSC was applied to investigate thermal stability and FT-IR analysis to confirm the chemical composition of the studied membranes. Saline water permeability tests of the prepared two-layer composite membranes were carried out. The largest pressure difference was measured for PA nanofiber/Novatexx 2430 sample, which was ascribed to a denser net structure of the membrane support and possibly to the newly formed layer of dissolved salts on the membrane surface.
PB  - Taylor and Francis
T2  - Journal of the Textile Institute
T1  - Characterization of microporous PP/PE nonwoven mats surface modified by deposition of electrospun nanofibers
VL  - 114
IS  - 1
SP  - 110
EP  - 121
DO  - 10.1080/00405000.2021.2024343
ER  - 

@article{
author = "Putić, Lana and Stajić-Trošić, Jasna and Ćosović, Vladan and Grujić, Aleksandar and Milanović, Jovana and Pilić, Branka and Stanković, Snežana",
year = "2023",
abstract = "This study investigates the effect of surface modification by deposition of electrospun fibers on properties and performance of three different microporous polypropylene/polyethylene (PP/PE) commercial nonwoven membrane supports (Novatexx 2430, 2465 and 2473). Polyamide (nylon 6) nanofiber webs with a small number of defects and fibers of about 100 nanometer diameter were successfully deposited onto a surface of the selected membrane supports. FESEM was used to examine microstructure and morphology of the unmodified substrates and the prepared composite two-layer membranes. DSC was applied to investigate thermal stability and FT-IR analysis to confirm the chemical composition of the studied membranes. Saline water permeability tests of the prepared two-layer composite membranes were carried out. The largest pressure difference was measured for PA nanofiber/Novatexx 2430 sample, which was ascribed to a denser net structure of the membrane support and possibly to the newly formed layer of dissolved salts on the membrane surface.",
publisher = "Taylor and Francis",
journal = "Journal of the Textile Institute",
title = "Characterization of microporous PP/PE nonwoven mats surface modified by deposition of electrospun nanofibers",
volume = "114",
number = "1",
pages = "110-121",
doi = "10.1080/00405000.2021.2024343"
}

Putić, L., Stajić-Trošić, J., Ćosović, V., Grujić, A., Milanović, J., Pilić, B.,& Stanković, S.. (2023). Characterization of microporous PP/PE nonwoven mats surface modified by deposition of electrospun nanofibers. in Journal of the Textile Institute
Taylor and Francis., 114(1), 110-121.
https://doi.org/10.1080/00405000.2021.2024343

Putić L, Stajić-Trošić J, Ćosović V, Grujić A, Milanović J, Pilić B, Stanković S. Characterization of microporous PP/PE nonwoven mats surface modified by deposition of electrospun nanofibers. in Journal of the Textile Institute. 2023;114(1):110-121.
doi:10.1080/00405000.2021.2024343 .

Putić, Lana, Stajić-Trošić, Jasna, Ćosović, Vladan, Grujić, Aleksandar, Milanović, Jovana, Pilić, Branka, Stanković, Snežana, "Characterization of microporous PP/PE nonwoven mats surface modified by deposition of electrospun nanofibers" in Journal of the Textile Institute, 114, no. 1 (2023):110-121,
https://doi.org/10.1080/00405000.2021.2024343 . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko
AU  - Alnouri, Sabla
AU  - Perišić, Srđan
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6302
AB  - Polymer-bonded magnets are a class of composite material that combines the magnetic properties of metal particles and the molding possibility of a polymeric matrix. This class of materials has shown huge potential for various applications in industry and engineering. Traditional research in this field has so far mainly focused on mechanical, electrical or magnetic properties of the composite, or on particle size and distribution. This examination of synthesized Nd-Fe-B-epoxy composite materials includes the mutual comparison of impact toughness, fatigue, and the structural, thermal, dynamic-mechanical, and magnetic behavior of materials with different content of magnetic Nd-Fe-B particles, in a wide range from 5 to 95 wt.%. This paper tests the influence of the Nd-Fe-B content on impacting the toughness of the composite material, as this relationship has not been tested before. The results show that impact toughness decreases, while magnetic properties increase, along with increasing content of Nd-Fe-B. Based on the observed trends, selected samples have been analyzed in terms of crack growth rate behavior. Analysis of the fracture surface morphology reveals the formation of a stable and homogeneous composite material. The synthesis route, the applied methods of characterization and analysis, and the comparison of the obtained results can provide a composite material with optimum properties for a specific purpose.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Polymers
T1  - Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials
VL  - 15
IS  - 8
SP  - 1894
DO  - 10.3390/polym15081894
ER  - 

@article{
author = "Grujić, Aleksandar and Nedeljković, Dragutin and Stajić-Trošić, Jasna and Stijepović, Mirko and Alnouri, Sabla and Perišić, Srđan",
year = "2023",
abstract = "Polymer-bonded magnets are a class of composite material that combines the magnetic properties of metal particles and the molding possibility of a polymeric matrix. This class of materials has shown huge potential for various applications in industry and engineering. Traditional research in this field has so far mainly focused on mechanical, electrical or magnetic properties of the composite, or on particle size and distribution. This examination of synthesized Nd-Fe-B-epoxy composite materials includes the mutual comparison of impact toughness, fatigue, and the structural, thermal, dynamic-mechanical, and magnetic behavior of materials with different content of magnetic Nd-Fe-B particles, in a wide range from 5 to 95 wt.%. This paper tests the influence of the Nd-Fe-B content on impacting the toughness of the composite material, as this relationship has not been tested before. The results show that impact toughness decreases, while magnetic properties increase, along with increasing content of Nd-Fe-B. Based on the observed trends, selected samples have been analyzed in terms of crack growth rate behavior. Analysis of the fracture surface morphology reveals the formation of a stable and homogeneous composite material. The synthesis route, the applied methods of characterization and analysis, and the comparison of the obtained results can provide a composite material with optimum properties for a specific purpose.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Polymers",
title = "Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials",
volume = "15",
number = "8",
pages = "1894",
doi = "10.3390/polym15081894"
}

Grujić, A., Nedeljković, D., Stajić-Trošić, J., Stijepović, M., Alnouri, S.,& Perišić, S.. (2023). Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials. in Polymers
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 15(8), 1894.
https://doi.org/10.3390/polym15081894

Grujić A, Nedeljković D, Stajić-Trošić J, Stijepović M, Alnouri S, Perišić S. Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials. in Polymers. 2023;15(8):1894.
doi:10.3390/polym15081894 .

Grujić, Aleksandar, Nedeljković, Dragutin, Stajić-Trošić, Jasna, Stijepović, Mirko, Alnouri, Sabla, Perišić, Srđan, "Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials" in Polymers, 15, no. 8 (2023):1894,
https://doi.org/10.3390/polym15081894 . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Alnouri, Sabla
AU  - Stijepović, Vladimir
AU  - Stajić-Trošić, Jasna
AU  - Grozdanić, Nikola
AU  - Grujić, Aleksandar
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5367
AB  - This paper introduces solute-solvent interactions onto a universal transport modeling approach that has been recently introduced for predicting RO membrane performance. The mathematical modeling framework utilizes chemical potential calculations rather than concentrations, and is based on the standard solution diffusion theory. Accounting for solute-solvent interactions were all based on a Maxwell-Stefan approach for reduced motion of particles in membrane pores. Overall, the proposed model is very effective in generating all the necessary parameters, especially for estimating the water permeability, as well as the various permeabilities associated with both, monovalent and divalent types of ion in the solution. Moreover, the effects of osmotic pressure on the respective species and water flux can be estimated. The proposed RO model was found to be very efficient in predicting the performance of various types of membranes, and its performance has been validated against available membrane performance data obtained from various sources. Since the attained model predictions are in very good agreement with actual membrane performance data, the proposed model can be considered as a very effective tool for use in commercial process simulator platforms.
PB  - Elsevier
T2  - Computers and Chemical Engineering
T1  - The development of a process simulator transport model for RO systems
VL  - 161
SP  - 107783
DO  - 10.1016/j.compchemeng.2022.107783
ER  - 

@article{
author = "Stijepović, Mirko and Alnouri, Sabla and Stijepović, Vladimir and Stajić-Trošić, Jasna and Grozdanić, Nikola and Grujić, Aleksandar",
year = "2022",
abstract = "This paper introduces solute-solvent interactions onto a universal transport modeling approach that has been recently introduced for predicting RO membrane performance. The mathematical modeling framework utilizes chemical potential calculations rather than concentrations, and is based on the standard solution diffusion theory. Accounting for solute-solvent interactions were all based on a Maxwell-Stefan approach for reduced motion of particles in membrane pores. Overall, the proposed model is very effective in generating all the necessary parameters, especially for estimating the water permeability, as well as the various permeabilities associated with both, monovalent and divalent types of ion in the solution. Moreover, the effects of osmotic pressure on the respective species and water flux can be estimated. The proposed RO model was found to be very efficient in predicting the performance of various types of membranes, and its performance has been validated against available membrane performance data obtained from various sources. Since the attained model predictions are in very good agreement with actual membrane performance data, the proposed model can be considered as a very effective tool for use in commercial process simulator platforms.",
publisher = "Elsevier",
journal = "Computers and Chemical Engineering",
title = "The development of a process simulator transport model for RO systems",
volume = "161",
pages = "107783",
doi = "10.1016/j.compchemeng.2022.107783"
}

Stijepović, M., Alnouri, S., Stijepović, V., Stajić-Trošić, J., Grozdanić, N.,& Grujić, A.. (2022). The development of a process simulator transport model for RO systems. in Computers and Chemical Engineering
Elsevier., 161, 107783.
https://doi.org/10.1016/j.compchemeng.2022.107783

Stijepović M, Alnouri S, Stijepović V, Stajić-Trošić J, Grozdanić N, Grujić A. The development of a process simulator transport model for RO systems. in Computers and Chemical Engineering. 2022;161:107783.
doi:10.1016/j.compchemeng.2022.107783 .

Stijepović, Mirko, Alnouri, Sabla, Stijepović, Vladimir, Stajić-Trošić, Jasna, Grozdanić, Nikola, Grujić, Aleksandar, "The development of a process simulator transport model for RO systems" in Computers and Chemical Engineering, 161 (2022):107783,
https://doi.org/10.1016/j.compchemeng.2022.107783 . .

TY  - JOUR
AU  - Putić, Lana
AU  - Alnouri, Sabla Y.
AU  - Stijepović, Vladimir
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4503
AB  - This paper presents a new transport model for reverse osmosis (RO) systems, which combines irreversible thermodynamics, together with solution-diffusion theory. The simplifications adopted by the classical theory for solution-diffusion mechanisms have been found to be quite lacking when it comes to predicting the separation of multicomponent mixtures. The presented model accounts for multicomponent computations through the application of thermodynamic property models, as a means to predict the various interactions amongst the species that are present in solution. The developed transport model is relatively easy to implement, and can be utilized alongside existing equipment and thermodynamic property models. The applicability of the model presented in this paper has been tested on three different case studies, including a case that investigates single component behavior and a case that investigates multicomponent behavior The proposed model shows very good agreement with experimental results.
PB  - Elsevier
T2  - Computers and Chemical Engineering
T1  - A universal transportation model for reverse osmosis systems
VL  - 148
SP  - 107264
DO  - 10.1016/j.compchemeng.2021.107264
ER  - 

@article{
author = "Putić, Lana and Alnouri, Sabla Y. and Stijepović, Vladimir and Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko Z.",
year = "2021",
abstract = "This paper presents a new transport model for reverse osmosis (RO) systems, which combines irreversible thermodynamics, together with solution-diffusion theory. The simplifications adopted by the classical theory for solution-diffusion mechanisms have been found to be quite lacking when it comes to predicting the separation of multicomponent mixtures. The presented model accounts for multicomponent computations through the application of thermodynamic property models, as a means to predict the various interactions amongst the species that are present in solution. The developed transport model is relatively easy to implement, and can be utilized alongside existing equipment and thermodynamic property models. The applicability of the model presented in this paper has been tested on three different case studies, including a case that investigates single component behavior and a case that investigates multicomponent behavior The proposed model shows very good agreement with experimental results.",
publisher = "Elsevier",
journal = "Computers and Chemical Engineering",
title = "A universal transportation model for reverse osmosis systems",
volume = "148",
pages = "107264",
doi = "10.1016/j.compchemeng.2021.107264"
}

Putić, L., Alnouri, S. Y., Stijepović, V., Stajić-Trošić, J., Grujić, A.,& Stijepović, M. Z.. (2021). A universal transportation model for reverse osmosis systems. in Computers and Chemical Engineering
Elsevier., 148, 107264.
https://doi.org/10.1016/j.compchemeng.2021.107264

Putić L, Alnouri SY, Stijepović V, Stajić-Trošić J, Grujić A, Stijepović MZ. A universal transportation model for reverse osmosis systems. in Computers and Chemical Engineering. 2021;148:107264.
doi:10.1016/j.compchemeng.2021.107264 .

Putić, Lana, Alnouri, Sabla Y., Stijepović, Vladimir, Stajić-Trošić, Jasna, Grujić, Aleksandar, Stijepović, Mirko Z., "A universal transportation model for reverse osmosis systems" in Computers and Chemical Engineering, 148 (2021):107264,
https://doi.org/10.1016/j.compchemeng.2021.107264 . .

TY  - JOUR
AU  - Ilić-Pajić, Jovana
AU  - Ivaniš, Gorica
AU  - Radović, Ivona
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko Z.
AU  - Kijevčanin, Mirjana
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3784
AB  - In order to reduce negative influence of fossil fuels on environment, use of various renewable resources is highly promoted. Terpenes, naturally occurring in plants, can be added to petroleum fuel as its substitute up to a certain share. Thermodynamic properties of a fuel under high pressure and moderate temperature conditions are of significant importance for engine efficiency. This work reports density measurements of pure p-cymene, α-pinene, limonene and citral at temperatures (293.15–413.15) K and pressures (0.1–60) MPa, applying an Anton Paar DMA HP measuring cell. Density data were fitted by modified Tammann-Tait equation where the absolute average percentage deviation between measured and calculated densities was about 0.010%. The obtained parameters were used to estimate the isothermal compressibility, the isobaric thermal expansion coefficient, the internal pressure, and the difference between specific heat capacity at constant pressure and at constant volume. For examined compounds, all thermodynamic properties, except the internal pressure, decrease with pressure rise along an isotherm and increase as temperature increases at a constant pressure. The intersection point of isotherms for the isobaric thermal expansion coefficient for pure citral was registered at pressure 47 MPa, while for other analyzed terpenes the intersection point is above 60 MPa, outside the measurements pressure range.
PB  - Elsevier
T2  - The Journal of Chemical Thermodynamics
T1  - Experimental densities and derived thermodynamic properties of pure p-cymene, α-pinene, limonene and citral under high pressure conditions
VL  - 144
SP  - 106065
DO  - 10.1016/j.jct.2020.106065
ER  - 

@article{
author = "Ilić-Pajić, Jovana and Ivaniš, Gorica and Radović, Ivona and Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko Z. and Kijevčanin, Mirjana",
year = "2020",
abstract = "In order to reduce negative influence of fossil fuels on environment, use of various renewable resources is highly promoted. Terpenes, naturally occurring in plants, can be added to petroleum fuel as its substitute up to a certain share. Thermodynamic properties of a fuel under high pressure and moderate temperature conditions are of significant importance for engine efficiency. This work reports density measurements of pure p-cymene, α-pinene, limonene and citral at temperatures (293.15–413.15) K and pressures (0.1–60) MPa, applying an Anton Paar DMA HP measuring cell. Density data were fitted by modified Tammann-Tait equation where the absolute average percentage deviation between measured and calculated densities was about 0.010%. The obtained parameters were used to estimate the isothermal compressibility, the isobaric thermal expansion coefficient, the internal pressure, and the difference between specific heat capacity at constant pressure and at constant volume. For examined compounds, all thermodynamic properties, except the internal pressure, decrease with pressure rise along an isotherm and increase as temperature increases at a constant pressure. The intersection point of isotherms for the isobaric thermal expansion coefficient for pure citral was registered at pressure 47 MPa, while for other analyzed terpenes the intersection point is above 60 MPa, outside the measurements pressure range.",
publisher = "Elsevier",
journal = "The Journal of Chemical Thermodynamics",
title = "Experimental densities and derived thermodynamic properties of pure p-cymene, α-pinene, limonene and citral under high pressure conditions",
volume = "144",
pages = "106065",
doi = "10.1016/j.jct.2020.106065"
}

Ilić-Pajić, J., Ivaniš, G., Radović, I., Grujić, A., Stajić-Trošić, J., Stijepović, M. Z.,& Kijevčanin, M.. (2020). Experimental densities and derived thermodynamic properties of pure p-cymene, α-pinene, limonene and citral under high pressure conditions. in The Journal of Chemical Thermodynamics
Elsevier., 144, 106065.
https://doi.org/10.1016/j.jct.2020.106065

Ilić-Pajić J, Ivaniš G, Radović I, Grujić A, Stajić-Trošić J, Stijepović MZ, Kijevčanin M. Experimental densities and derived thermodynamic properties of pure p-cymene, α-pinene, limonene and citral under high pressure conditions. in The Journal of Chemical Thermodynamics. 2020;144:106065.
doi:10.1016/j.jct.2020.106065 .

Ilić-Pajić, Jovana, Ivaniš, Gorica, Radović, Ivona, Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko Z., Kijevčanin, Mirjana, "Experimental densities and derived thermodynamic properties of pure p-cymene, α-pinene, limonene and citral under high pressure conditions" in The Journal of Chemical Thermodynamics, 144 (2020):106065,
https://doi.org/10.1016/j.jct.2020.106065 . .

TY  - JOUR
AU  - Perišić, Srđan
AU  - Vuksanović, Marija M.
AU  - Petrović, Milos
AU  - Radisavljević, Andjela
AU  - Grujić, Aleksandar
AU  - Jančić-Heinemann, Radmila
AU  - Radojević, Vesna
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3129
AB  - Hybrid composite panels of Wood-Plastic Composites (WPC) consisting of wood and
poly (methyl methacrylate) (PMMA) were reinforced with alumina particles and made by
“hot pressing” method. Alumina-based particles were made by sol-gel technique. The
particles were characterized by the X-ray diffraction (XRD). The resulting alumina particles
were modified with (3mercaptopropyl) trimethoxysilane (MPTMS), in order to obtain better
mechanical properties of the composite relative to the composite with unmodified alumina
particles. The aim of this work was to study the influence of composite structure and the
moisture absorption on bending and the impact properties of the hybrid composite. The
bending and impact tests revealed that modulus of elasticity and absorbed energy of
deformation increased with modification of alumina and slightly decrease after moisture
absorption.
AB  - Хибридни композитни панели дрво-пластика композит (ДПК) који се
састоје од дрвета и поли(метил метакрилата) (ПММА) ојачани честицама
алуминијум оксида прецесирани методом „врућег пресовања“. Честице засноване на
алуминијум оксиду направљене су сол – гел техником. Карактеризација честица
вршена је рендгенском анализом. Добијене честице алуминијум оксида модификоване
су помоћу (меркаптопропил)триметоксисилана, како би се постигла боља механичка
својства композита у односу на композит са немодификованим честицама алуминијум
оксида. Циљ овог рада је проучавање утицаја структуре хибридног композита и
апсорбоване влаге на механичка својства, савијање и контролисани удар. Тестови
савијања и удара показали су да се модул еластичности и апсорбована енергија
деформације повећава модификацијом алуминијум оксидних честица, а незнатно
самањује након апсорпције влаге.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials
VL  - 51
IS  - 1
SP  - 115
EP  - 124
DO  - 10.2298/SOS1901115P
ER  - 

@article{
author = "Perišić, Srđan and Vuksanović, Marija M. and Petrović, Milos and Radisavljević, Andjela and Grujić, Aleksandar and Jančić-Heinemann, Radmila and Radojević, Vesna",
year = "2019",
abstract = "Hybrid composite panels of Wood-Plastic Composites (WPC) consisting of wood and
poly (methyl methacrylate) (PMMA) were reinforced with alumina particles and made by
“hot pressing” method. Alumina-based particles were made by sol-gel technique. The
particles were characterized by the X-ray diffraction (XRD). The resulting alumina particles
were modified with (3mercaptopropyl) trimethoxysilane (MPTMS), in order to obtain better
mechanical properties of the composite relative to the composite with unmodified alumina
particles. The aim of this work was to study the influence of composite structure and the
moisture absorption on bending and the impact properties of the hybrid composite. The
bending and impact tests revealed that modulus of elasticity and absorbed energy of
deformation increased with modification of alumina and slightly decrease after moisture
absorption., Хибридни композитни панели дрво-пластика композит (ДПК) који се
састоје од дрвета и поли(метил метакрилата) (ПММА) ојачани честицама
алуминијум оксида прецесирани методом „врућег пресовања“. Честице засноване на
алуминијум оксиду направљене су сол – гел техником. Карактеризација честица
вршена је рендгенском анализом. Добијене честице алуминијум оксида модификоване
су помоћу (меркаптопропил)триметоксисилана, како би се постигла боља механичка
својства композита у односу на композит са немодификованим честицама алуминијум
оксида. Циљ овог рада је проучавање утицаја структуре хибридног композита и
апсорбоване влаге на механичка својства, савијање и контролисани удар. Тестови
савијања и удара показали су да се модул еластичности и апсорбована енергија
деформације повећава модификацијом алуминијум оксидних честица, а незнатно
самањује након апсорпције влаге.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials",
volume = "51",
number = "1",
pages = "115-124",
doi = "10.2298/SOS1901115P"
}

Perišić, S., Vuksanović, M. M., Petrović, M., Radisavljević, A., Grujić, A., Jančić-Heinemann, R.,& Radojević, V.. (2019). Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials. in Science of Sintering
Belgrade : Association for ETRAN Society., 51(1), 115-124.
https://doi.org/10.2298/SOS1901115P

Perišić S, Vuksanović MM, Petrović M, Radisavljević A, Grujić A, Jančić-Heinemann R, Radojević V. Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials. in Science of Sintering. 2019;51(1):115-124.
doi:10.2298/SOS1901115P .

Perišić, Srđan, Vuksanović, Marija M., Petrović, Milos, Radisavljević, Andjela, Grujić, Aleksandar, Jančić-Heinemann, Radmila, Radojević, Vesna, "Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials" in Science of Sintering, 51, no. 1 (2019):115-124,
https://doi.org/10.2298/SOS1901115P . .

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  - https://cer.ihtm.bg.ac.rs/handle/123456789/3232
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.
AB  - Ова студија представља припрему и карактеризацију нанокомпозита на бази етил целулозе. Успешна употреба једноставне технике изливања обезбедила је нанокомпозите са великим уделом магнетног нанопраха баријум ферита у полимерној матрици, обећавајући значајно побољшање механичких својстава. Истраживањем морфологије откривено је формирање агломерата који су и даље на наноскопском нивоу. Нанокомпозитни танки филмови са већим садржајем магнетног праха показали су значајно повећање прекидне чврстоће, издужења и микротврдоће у поређењу са чистом етил целулозом, што је био главни циљ овог истраживања.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites
VL  - 51
IS  - 3
SP  - 277
EP  - 283
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., Ова студија представља припрему и карактеризацију нанокомпозита на бази етил целулозе. Успешна употреба једноставне технике изливања обезбедила је нанокомпозите са великим уделом магнетног нанопраха баријум ферита у полимерној матрици, обећавајући значајно побољшање механичких својстава. Истраживањем морфологије откривено је формирање агломерата који су и даље на наноскопском нивоу. Нанокомпозитни танки филмови са већим садржајем магнетног праха показали су значајно повећање прекидне чврстоће, издужења и микротврдоће у поређењу са чистом етил целулозом, што је био главни циљ овог истраживања.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites",
volume = "51",
number = "3",
pages = "277-283",
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
Belgrade : Association for ETRAN Society., 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 . .

Stajčić, A., Popović, B., Vorkapić, M., Grujić, A.,& Stajić-Trošić, J.. (2019). Difuziona komora za ispitivanje separacionih svojstava membrana. 
University of Belgrade - Institute of Chemistry, Technology and Metallurgy..
https://hdl.handle.net/21.15107/rcub_cer_7140

Stajčić A, Popović B, Vorkapić M, Grujić A, Stajić-Trošić J. Difuziona komora za ispitivanje separacionih svojstava membrana. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_7140 .

Stajčić, Aleksandar, Popović, Bogdan, Vorkapić, Miloš, Grujić, Aleksandar, Stajić-Trošić, Jasna, "Difuziona komora za ispitivanje separacionih svojstava membrana" (2019),
https://hdl.handle.net/21.15107/rcub_cer_7140 .

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  - https://cer.ihtm.bg.ac.rs/handle/123456789/2359
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  - Hopkinton : Desalination Publications
T2  - Desalination and Water Treatment
T1  - Adsorption kinetics of polyethersulfone membrane-supported hydrogels
VL  - 131
SP  - 43
EP  - 49
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 = "Hopkinton : Desalination Publications",
journal = "Desalination and Water Treatment",
title = "Adsorption kinetics of polyethersulfone membrane-supported hydrogels",
volume = "131",
pages = "43-49",
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
Hopkinton : Desalination Publications., 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  - Grujić, Aleksandar
AU  - Ćosović, Vladan
AU  - Stajić-Trošić, Jasna
AU  - Ćosović, Aleksandar
AU  - Stijepović, Mirko
AU  - Putić, Lana
AU  - Žák, Tomáš
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4747
AB  - In this study, electrospinning combined with sol-gel technique is applied in order to produce magnetic nickel ferrite (Ni-ferrite) nanofibers. The prepared Ni-ferrite gel was mixed with poly(vinylpyrrolidone) (PVP) solution which was used as a spinning aid to enable spinnability of the mixture. Structural and morphological characteristics of the asspun ferrite gel/PVP composite web structure and calcinated Ni-ferrite nanofibers were analyzed using scanning electron microscopy (SEM). Phase composition analysis was carried out by Fourier-transform infrared (FT-IR) spectroscopy, X-Ray diffraction analysis (XRD) and Fe-57 Mossbauer spectroscopy (MS). The obtained results suggest that the pure nanocrystalline NiFe2O4 dense mat to the almost coral-like structure of fibers with diameters ranging from hundreds of nanometers to few micrometers was obtained. The results of MS analysis revealed the existence of a crystallite size distribution within the material as well as the existence of a superparamagnetic fraction with very small crystallite sizes (<13nm). Magnetic behavior of the obtained material at elevated temperatures was also scrutinized using thermomagnetic measurements (TM) up to 800 degrees C.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - Synthesis of NiFe2O4 nanofibers by joint sol-gel and electrospinning technique
VL  - 24
IS  - 3
SP  - 173
EP  - 180
DO  - 10.30544/387
ER  - 

@article{
author = "Grujić, Aleksandar and Ćosović, Vladan and Stajić-Trošić, Jasna and Ćosović, Aleksandar and Stijepović, Mirko and Putić, Lana and Žák, Tomáš",
year = "2018",
abstract = "In this study, electrospinning combined with sol-gel technique is applied in order to produce magnetic nickel ferrite (Ni-ferrite) nanofibers. The prepared Ni-ferrite gel was mixed with poly(vinylpyrrolidone) (PVP) solution which was used as a spinning aid to enable spinnability of the mixture. Structural and morphological characteristics of the asspun ferrite gel/PVP composite web structure and calcinated Ni-ferrite nanofibers were analyzed using scanning electron microscopy (SEM). Phase composition analysis was carried out by Fourier-transform infrared (FT-IR) spectroscopy, X-Ray diffraction analysis (XRD) and Fe-57 Mossbauer spectroscopy (MS). The obtained results suggest that the pure nanocrystalline NiFe2O4 dense mat to the almost coral-like structure of fibers with diameters ranging from hundreds of nanometers to few micrometers was obtained. The results of MS analysis revealed the existence of a crystallite size distribution within the material as well as the existence of a superparamagnetic fraction with very small crystallite sizes (<13nm). Magnetic behavior of the obtained material at elevated temperatures was also scrutinized using thermomagnetic measurements (TM) up to 800 degrees C.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "Synthesis of NiFe2O4 nanofibers by joint sol-gel and electrospinning technique",
volume = "24",
number = "3",
pages = "173-180",
doi = "10.30544/387"
}

Grujić, A., Ćosović, V., Stajić-Trošić, J., Ćosović, A., Stijepović, M., Putić, L.,& Žák, T.. (2018). Synthesis of NiFe2O4 nanofibers by joint sol-gel and electrospinning technique. in Metallurgical & Materials Engineering
Belgrade : Association of Metallurgical Engineers of Serbia., 24(3), 173-180.
https://doi.org/10.30544/387

Grujić A, Ćosović V, Stajić-Trošić J, Ćosović A, Stijepović M, Putić L, Žák T. Synthesis of NiFe2O4 nanofibers by joint sol-gel and electrospinning technique. in Metallurgical & Materials Engineering. 2018;24(3):173-180.
doi:10.30544/387 .

Grujić, Aleksandar, Ćosović, Vladan, Stajić-Trošić, Jasna, Ćosović, Aleksandar, Stijepović, Mirko, Putić, Lana, Žák, Tomáš, "Synthesis of NiFe2O4 nanofibers by joint sol-gel and electrospinning technique" in Metallurgical & Materials Engineering, 24, no. 3 (2018):173-180,
https://doi.org/10.30544/387 . .

TY  - JOUR
AU  - Polovina, Saša
AU  - Vojtech, Merva
AU  - Dejanovic, Igor
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2302
AB  - Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.
PB  - American Chemical Society (ACS)
T2  - Energy & Fuels
T1  - Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer
VL  - 32
IS  - 5
SP  - 6378
EP  - 6396
DO  - 10.1021/acs.energyfuels.7b03897
ER  - 

@article{
author = "Polovina, Saša and Vojtech, Merva and Dejanovic, Igor and Grujić, Aleksandar and Stijepović, Mirko Z.",
year = "2018",
abstract = "Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.",
publisher = "American Chemical Society (ACS)",
journal = "Energy & Fuels",
title = "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer",
volume = "32",
number = "5",
pages = "6378-6396",
doi = "10.1021/acs.energyfuels.7b03897"
}

Polovina, S., Vojtech, M., Dejanovic, I., Grujić, A.,& Stijepović, M. Z.. (2018). Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels
American Chemical Society (ACS)., 32(5), 6378-6396.
https://doi.org/10.1021/acs.energyfuels.7b03897

Polovina S, Vojtech M, Dejanovic I, Grujić A, Stijepović MZ. Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels. 2018;32(5):6378-6396.
doi:10.1021/acs.energyfuels.7b03897 .

Polovina, Saša, Vojtech, Merva, Dejanovic, Igor, Grujić, Aleksandar, Stijepović, Mirko Z., "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer" in Energy & Fuels, 32, no. 5 (2018):6378-6396,
https://doi.org/10.1021/acs.energyfuels.7b03897 . .

TY  - JOUR
AU  - Polovina, Saša
AU  - Vojtech, Merva
AU  - Dejanovic, Igor
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4287
AB  - Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.
PB  - American Chemical Society (ACS)
T2  - Energy & Fuels
T1  - Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer
VL  - 32
IS  - 5
SP  - 6378
EP  - 6396
DO  - 10.1021/acs.energyfuels.7b03897
ER  - 

@article{
author = "Polovina, Saša and Vojtech, Merva and Dejanovic, Igor and Grujić, Aleksandar and Stijepović, Mirko Z.",
year = "2018",
abstract = "Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.",
publisher = "American Chemical Society (ACS)",
journal = "Energy & Fuels",
title = "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer",
volume = "32",
number = "5",
pages = "6378-6396",
doi = "10.1021/acs.energyfuels.7b03897"
}

Polovina, S., Vojtech, M., Dejanovic, I., Grujić, A.,& Stijepović, M. Z.. (2018). Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels
American Chemical Society (ACS)., 32(5), 6378-6396.
https://doi.org/10.1021/acs.energyfuels.7b03897

Polovina S, Vojtech M, Dejanovic I, Grujić A, Stijepović MZ. Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels. 2018;32(5):6378-6396.
doi:10.1021/acs.energyfuels.7b03897 .

Polovina, Saša, Vojtech, Merva, Dejanovic, Igor, Grujić, Aleksandar, Stijepović, Mirko Z., "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer" in Energy & Fuels, 32, no. 5 (2018):6378-6396,
https://doi.org/10.1021/acs.energyfuels.7b03897 . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko Z.
AU  - Perišić, Srđan
AU  - Žák, Tomáš
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2082
AB  - The Nd-Fe-B-barium ferrite hybrid composite materials with epoxy matrix presented in this paper cover maximum energy product from 1 to 13 MGOe. Mixture of magnetic particles is responsible for high magnetic quality, while the thermosetting resin plays a role in mechanical properties. Samples with various ratio of Nd-Fe-B to barium ferrite in constant weight of epoxy resin are examined by tensile strength measurements. Magnetic measurements carried out by using vibrating sample magnetometer (VSM) show typical hysteresis loop. A structural analysis of composite surface is conducted by scanning electron microscope (SEM). Uniform particle distribution of plate shape Nd-Fe-B particles and spherical barium ferrite agglomerates is essential for both, mechanical and magnetic properties of composite materials. Fine particles are incorporated in-between larger particles in epoxy bulk which lead to improving the properties.
AB  - U ovom radu proučavani su hibridni Nd-Fe-B-barijum ferit kompozitni materijali sa epoksi matricom čiji se maksimani energetski proizvod kreće od 1 do 13 MGOe. Odlična magnetna svojstva kompozita potiču od smeše magnetnih čestica, dok termoočvršćavajući polimer ima uticaj na mehanička svojstva. Uzorci sa različitim odnosom udela Nd-Fe-B i barijum ferita u konstantnoj masi epoksi veziva su ispitivani na zateznu čvrstoću. Magnetna merenja vršena pomoću vibracionog magnetometra (VSM) pokazuju karakteristučnu histerezisnu petlju. Strukturnu analizu na površini kompozita sprovedena pomoću skenirajuće elektronske mikroskopije (SEM). Uniformna raspodela pločastih Nd-Fe-B čestica i sferičnih aglomerata barijum ferita je veoma značajna i za mehanička i za magnetna svojstva kompozitnih materijala. Sitne čestice su inkorporirane između velikih čestica u masi epoksida što dovodi do poboljšanja svojstava.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Tensile strength properties of hybrid magnetic composite materials
T1  - Zatezna čvrstoća hibridnih magnetnih kompozitnih materijala
VL  - 58
IS  - 4
SP  - 570
EP  - 575
DO  - 10.5937/ZasMat1704570G
ER  - 

@article{
author = "Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko Z. and Perišić, Srđan and Žák, Tomáš",
year = "2017",
abstract = "The Nd-Fe-B-barium ferrite hybrid composite materials with epoxy matrix presented in this paper cover maximum energy product from 1 to 13 MGOe. Mixture of magnetic particles is responsible for high magnetic quality, while the thermosetting resin plays a role in mechanical properties. Samples with various ratio of Nd-Fe-B to barium ferrite in constant weight of epoxy resin are examined by tensile strength measurements. Magnetic measurements carried out by using vibrating sample magnetometer (VSM) show typical hysteresis loop. A structural analysis of composite surface is conducted by scanning electron microscope (SEM). Uniform particle distribution of plate shape Nd-Fe-B particles and spherical barium ferrite agglomerates is essential for both, mechanical and magnetic properties of composite materials. Fine particles are incorporated in-between larger particles in epoxy bulk which lead to improving the properties., U ovom radu proučavani su hibridni Nd-Fe-B-barijum ferit kompozitni materijali sa epoksi matricom čiji se maksimani energetski proizvod kreće od 1 do 13 MGOe. Odlična magnetna svojstva kompozita potiču od smeše magnetnih čestica, dok termoočvršćavajući polimer ima uticaj na mehanička svojstva. Uzorci sa različitim odnosom udela Nd-Fe-B i barijum ferita u konstantnoj masi epoksi veziva su ispitivani na zateznu čvrstoću. Magnetna merenja vršena pomoću vibracionog magnetometra (VSM) pokazuju karakteristučnu histerezisnu petlju. Strukturnu analizu na površini kompozita sprovedena pomoću skenirajuće elektronske mikroskopije (SEM). Uniformna raspodela pločastih Nd-Fe-B čestica i sferičnih aglomerata barijum ferita je veoma značajna i za mehanička i za magnetna svojstva kompozitnih materijala. Sitne čestice su inkorporirane između velikih čestica u masi epoksida što dovodi do poboljšanja svojstava.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Tensile strength properties of hybrid magnetic composite materials, Zatezna čvrstoća hibridnih magnetnih kompozitnih materijala",
volume = "58",
number = "4",
pages = "570-575",
doi = "10.5937/ZasMat1704570G"
}

Grujić, A., Stajić-Trošić, J., Stijepović, M. Z., Perišić, S.,& Žák, T.. (2017). Tensile strength properties of hybrid magnetic composite materials. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 58(4), 570-575.
https://doi.org/10.5937/ZasMat1704570G

Grujić A, Stajić-Trošić J, Stijepović MZ, Perišić S, Žák T. Tensile strength properties of hybrid magnetic composite materials. in Zaštita materijala. 2017;58(4):570-575.
doi:10.5937/ZasMat1704570G .

Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko Z., Perišić, Srđan, Žák, Tomáš, "Tensile strength properties of hybrid magnetic composite materials" in Zaštita materijala, 58, no. 4 (2017):570-575,
https://doi.org/10.5937/ZasMat1704570G . .

TY  - CONF
AU  - Stijcpovic, Mirko Z.
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Stijepović, Vladimir
AU  - Grujić, Aleksandar
AU  - Kijevčanin, Mirjana
AU  - Seferlis, Panos
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2119
AB  - We propose a systematic model for the optimum design of Organic Rankine Cycles (ORC) used for power generation from multiple heat sources available at different temperatures. The model enables the automated generation of inclusive and flexible ORC cascades and is optimized using a global optimization algorithm. Design parameters include the number of ORC cascades, the shared structure of the heat exchanger network, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. Results indicate significant operating improvements from using a double ORC cascade with different working fluids.
PB  - Elsevier
C3  - 27th European Symposium on Computer Aided Process Engineering, Pt A
T1  - Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection
SP  - 769
EP  - 774
DO  - 10.1016/B978-0-444-63965-3.50130-6
ER  - 

@conference{
author = "Stijcpovic, Mirko Z. and Papadopoulos, Athanasios I. and Linke, Patrick and Stijepović, Vladimir and Grujić, Aleksandar and Kijevčanin, Mirjana and Seferlis, Panos",
year = "2017",
abstract = "We propose a systematic model for the optimum design of Organic Rankine Cycles (ORC) used for power generation from multiple heat sources available at different temperatures. The model enables the automated generation of inclusive and flexible ORC cascades and is optimized using a global optimization algorithm. Design parameters include the number of ORC cascades, the shared structure of the heat exchanger network, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. Results indicate significant operating improvements from using a double ORC cascade with different working fluids.",
publisher = "Elsevier",
journal = "27th European Symposium on Computer Aided Process Engineering, Pt A",
title = "Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection",
pages = "769-774",
doi = "10.1016/B978-0-444-63965-3.50130-6"
}

Stijcpovic, M. Z., Papadopoulos, A. I., Linke, P., Stijepović, V., Grujić, A., Kijevčanin, M.,& Seferlis, P.. (2017). Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection. in 27th European Symposium on Computer Aided Process Engineering, Pt A
Elsevier., 769-774.
https://doi.org/10.1016/B978-0-444-63965-3.50130-6

Stijcpovic MZ, Papadopoulos AI, Linke P, Stijepović V, Grujić A, Kijevčanin M, Seferlis P. Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection. in 27th European Symposium on Computer Aided Process Engineering, Pt A. 2017;:769-774.
doi:10.1016/B978-0-444-63965-3.50130-6 .

Stijcpovic, Mirko Z., Papadopoulos, Athanasios I., Linke, Patrick, Stijepović, Vladimir, Grujić, Aleksandar, Kijevčanin, Mirjana, Seferlis, Panos, "Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection" in 27th European Symposium on Computer Aided Process Engineering, Pt A (2017):769-774,
https://doi.org/10.1016/B978-0-444-63965-3.50130-6 . .

TY  - JOUR
AU  - Stijepović, Mirko Z.
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Stijepović, Vladimir
AU  - Grujić, Aleksandar
AU  - Kijevčanin, Mirjana
AU  - Seferlis, Panos
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2229
AB  - This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection
VL  - 142
SP  - 1950
EP  - 1970
DO  - 10.1016/j.jclepro.2016.11.088
ER  - 

@article{
author = "Stijepović, Mirko Z. and Papadopoulos, Athanasios I. and Linke, Patrick and Stijepović, Vladimir and Grujić, Aleksandar and Kijevčanin, Mirjana and Seferlis, Panos",
year = "2017",
abstract = "This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection",
volume = "142",
pages = "1950-1970",
doi = "10.1016/j.jclepro.2016.11.088"
}

Stijepović, M. Z., Papadopoulos, A. I., Linke, P., Stijepović, V., Grujić, A., Kijevčanin, M.,& Seferlis, P.. (2017). Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 142, 1950-1970.
https://doi.org/10.1016/j.jclepro.2016.11.088

Stijepović MZ, Papadopoulos AI, Linke P, Stijepović V, Grujić A, Kijevčanin M, Seferlis P. Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production. 2017;142:1950-1970.
doi:10.1016/j.jclepro.2016.11.088 .

Stijepović, Mirko Z., Papadopoulos, Athanasios I., Linke, Patrick, Stijepović, Vladimir, Grujić, Aleksandar, Kijevčanin, Mirjana, Seferlis, Panos, "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection" in Journal of Cleaner Production, 142 (2017):1950-1970,
https://doi.org/10.1016/j.jclepro.2016.11.088 . .

TY  - JOUR
AU  - Stijepović, Mirko Z.
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Stijepović, Vladimir
AU  - Grujić, Aleksandar
AU  - Kijevčanin, Mirjana
AU  - Seferlis, Panos
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3032
AB  - This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection
VL  - 142
SP  - 1950
EP  - 1970
DO  - 10.1016/j.jclepro.2016.11.088
ER  - 

@article{
author = "Stijepović, Mirko Z. and Papadopoulos, Athanasios I. and Linke, Patrick and Stijepović, Vladimir and Grujić, Aleksandar and Kijevčanin, Mirjana and Seferlis, Panos",
year = "2017",
abstract = "This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection",
volume = "142",
pages = "1950-1970",
doi = "10.1016/j.jclepro.2016.11.088"
}

Stijepović, M. Z., Papadopoulos, A. I., Linke, P., Stijepović, V., Grujić, A., Kijevčanin, M.,& Seferlis, P.. (2017). Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 142, 1950-1970.
https://doi.org/10.1016/j.jclepro.2016.11.088

Stijepović MZ, Papadopoulos AI, Linke P, Stijepović V, Grujić A, Kijevčanin M, Seferlis P. Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production. 2017;142:1950-1970.
doi:10.1016/j.jclepro.2016.11.088 .

Stijepović, Mirko Z., Papadopoulos, Athanasios I., Linke, Patrick, Stijepović, Vladimir, Grujić, Aleksandar, Kijevčanin, Mirjana, Seferlis, Panos, "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection" in Journal of Cleaner Production, 142 (2017):1950-1970,
https://doi.org/10.1016/j.jclepro.2016.11.088 . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
AU  - Stajić-Trošić, Jasna
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1637
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
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
VL  - 70
IS  - 2
SP  - 216
EP  - 222
DO  - 10.5937/tehnika1502216N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stijepović, Mirko Z. 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",
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",
volume = "70",
number = "2",
pages = "216-222",
doi = "10.5937/tehnika1502216N"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stijepović, M. Z.,& 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., 70(2), 216-222.
https://doi.org/10.5937/tehnika1502216N

Nedeljković D, Stajčić A, Grujić A, Stijepović MZ, 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 Z., 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  - El, Swie H
AU  - Radojević, Vesna
AU  - Brajovic, L
AU  - Stajić-Trošić, Jasna
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Aleksić, Radoslav
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1677
AB  - The commercial multi-mode optical fiber was coated with magnetic composite material prepared using Nd-Fe-B permanent magnet powder dispersed in poly (ethylene-co-vinyl acetate)-EVA. Characterization of microstructure, thermal stability and mechanical properties of the composite coatings with different Nd-Fe-B powder content were performed using Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), and standard tensile tester, respectively. Experimental results show that composites with higher content of Nd-Fe-B powder have improved thermal and mechanical properties. Propagation characteristics of the constructed optical fiber magnetic sensing element (OFMSE) in the external magnetic field were investigated in relation to quality and composition of the applied composite coatings. The attenuation of optical signal with applied external magnetic field intensity was monitored and the results suggest that the sample with 50 wt-% of Nd-Fe-B provides the greatest sensitivity of the sensor element.
PB  - Inst Materials Physics
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Synthesis and performance of polymer based magnetic composite sensing element
VL  - 10
IS  - 4
SP  - 1475
EP  - 1483
UR  - https://hdl.handle.net/21.15107/rcub_cer_1677
ER  - 

@article{
author = "El, Swie H and Radojević, Vesna and Brajovic, L and Stajić-Trošić, Jasna and Ćosović, Vladan and Grujić, Aleksandar and Aleksić, Radoslav",
year = "2015",
abstract = "The commercial multi-mode optical fiber was coated with magnetic composite material prepared using Nd-Fe-B permanent magnet powder dispersed in poly (ethylene-co-vinyl acetate)-EVA. Characterization of microstructure, thermal stability and mechanical properties of the composite coatings with different Nd-Fe-B powder content were performed using Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), and standard tensile tester, respectively. Experimental results show that composites with higher content of Nd-Fe-B powder have improved thermal and mechanical properties. Propagation characteristics of the constructed optical fiber magnetic sensing element (OFMSE) in the external magnetic field were investigated in relation to quality and composition of the applied composite coatings. The attenuation of optical signal with applied external magnetic field intensity was monitored and the results suggest that the sample with 50 wt-% of Nd-Fe-B provides the greatest sensitivity of the sensor element.",
publisher = "Inst Materials Physics",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Synthesis and performance of polymer based magnetic composite sensing element",
volume = "10",
number = "4",
pages = "1475-1483",
url = "https://hdl.handle.net/21.15107/rcub_cer_1677"
}

El, S. H., Radojević, V., Brajovic, L., Stajić-Trošić, J., Ćosović, V., Grujić, A.,& Aleksić, R.. (2015). Synthesis and performance of polymer based magnetic composite sensing element. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics., 10(4), 1475-1483.
https://hdl.handle.net/21.15107/rcub_cer_1677

El SH, Radojević V, Brajovic L, Stajić-Trošić J, Ćosović V, Grujić A, Aleksić R. Synthesis and performance of polymer based magnetic composite sensing element. in Digest Journal of Nanomaterials and Biostructures. 2015;10(4):1475-1483.
https://hdl.handle.net/21.15107/rcub_cer_1677 .

El, Swie H, Radojević, Vesna, Brajovic, L, Stajić-Trošić, Jasna, Ćosović, Vladan, Grujić, Aleksandar, Aleksić, Radoslav, "Synthesis and performance of polymer based magnetic composite sensing element" in Digest Journal of Nanomaterials and Biostructures, 10, no. 4 (2015):1475-1483,
https://hdl.handle.net/21.15107/rcub_cer_1677 .

TY  - JOUR
AU  - Ilić-Pajić, Jovana
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
AU  - Stajić-Trošić, Jasna
AU  - Bugarski, Branko
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1695
AB  - The aim of this paper is to obtain microbeads of natural polymers such as alginate and chitosan. These microbeads were used as potential carriers for the active ingredients so that in this study the diffusion of various substances from them is analyzed. Alginate microbeads were obtained by electrostatic droplet method. In the resulting microbeads was performed absorption of three tracer indicators with different molecular weight (acridine orange, blue dextran, methylene blue). The goal of the experiment is to monitor indicators release kinetics from microbeads. Based on these measurements the layoffs curve should give an answer on the impact of the molecular size of the three indicators on the diffusion rate of microbeads. In order to achieve the slow release of indicators alginate microbeads were coated with chitosan. Chitosan has an impact on reducing the porosity of gel, which further led to lower release tracer indicators of microbeads. Comparative analysis of the obtained layoffs curves answers about the impact on the process of obtaining micro diffusion rate indicator.
AB  - U ovom radu je prikazan proces sinteze mikročestica od prirodnih polimera, alginata i hitozana, kao i neka njihova svojstva. Osnovna primena ovih mikročestica je da se koriste kao potencijalni nosači za aktivne supstance. U tom smislu je ispitivana i difuzija različitih supstanci iz njih. Na alginatne mikročestice dobijene metodom elektrostatičke ekstruzije vršena je apsorpcija tri trejserska indikatora sa različitim molekulskim masama: akridin oranž, plavi dekstran i metilensko plavo. Praćenjem kinetike otpuštanja indikatora iz mikročestica konstruisane su krive otpuštanja koje daju informaciju o uticaju veličine molekula svakog od indikatora na brzinu difuzije iz mikročestica. Da bi se postiglo što sporije otpuštanje indikatora alginatne mikročestice su oblagane hitozanom. Hitozan ima uticaj na smanjenje poroznosti gela, što dovodi do sporijeg otpuštanja trejsersikh indikatora iz mikročestica. Uporedna analiza dobijenih krivih otpuštanja daje odgovor o uticaju postupka dobijanja mikročestica na brzinu difuzije indikatora.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Effect of tracers molecular weight on the release process from alginate microbeads
T1  - Uticaj molekulske mase trejserskih indikatora na kontrolisano otpuštanje iz alginatnih mikročestica
VL  - 70
IS  - 3
SP  - 401
EP  - 405
DO  - 10.5937/tehnika1503401I
ER  - 

@article{
author = "Ilić-Pajić, Jovana and Grujić, Aleksandar and Stijepović, Mirko Z. and Stajić-Trošić, Jasna and Bugarski, Branko",
year = "2015",
abstract = "The aim of this paper is to obtain microbeads of natural polymers such as alginate and chitosan. These microbeads were used as potential carriers for the active ingredients so that in this study the diffusion of various substances from them is analyzed. Alginate microbeads were obtained by electrostatic droplet method. In the resulting microbeads was performed absorption of three tracer indicators with different molecular weight (acridine orange, blue dextran, methylene blue). The goal of the experiment is to monitor indicators release kinetics from microbeads. Based on these measurements the layoffs curve should give an answer on the impact of the molecular size of the three indicators on the diffusion rate of microbeads. In order to achieve the slow release of indicators alginate microbeads were coated with chitosan. Chitosan has an impact on reducing the porosity of gel, which further led to lower release tracer indicators of microbeads. Comparative analysis of the obtained layoffs curves answers about the impact on the process of obtaining micro diffusion rate indicator., U ovom radu je prikazan proces sinteze mikročestica od prirodnih polimera, alginata i hitozana, kao i neka njihova svojstva. Osnovna primena ovih mikročestica je da se koriste kao potencijalni nosači za aktivne supstance. U tom smislu je ispitivana i difuzija različitih supstanci iz njih. Na alginatne mikročestice dobijene metodom elektrostatičke ekstruzije vršena je apsorpcija tri trejserska indikatora sa različitim molekulskim masama: akridin oranž, plavi dekstran i metilensko plavo. Praćenjem kinetike otpuštanja indikatora iz mikročestica konstruisane su krive otpuštanja koje daju informaciju o uticaju veličine molekula svakog od indikatora na brzinu difuzije iz mikročestica. Da bi se postiglo što sporije otpuštanje indikatora alginatne mikročestice su oblagane hitozanom. Hitozan ima uticaj na smanjenje poroznosti gela, što dovodi do sporijeg otpuštanja trejsersikh indikatora iz mikročestica. Uporedna analiza dobijenih krivih otpuštanja daje odgovor o uticaju postupka dobijanja mikročestica na brzinu difuzije indikatora.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Effect of tracers molecular weight on the release process from alginate microbeads, Uticaj molekulske mase trejserskih indikatora na kontrolisano otpuštanje iz alginatnih mikročestica",
volume = "70",
number = "3",
pages = "401-405",
doi = "10.5937/tehnika1503401I"
}

Ilić-Pajić, J., Grujić, A., Stijepović, M. Z., Stajić-Trošić, J.,& Bugarski, B.. (2015). Effect of tracers molecular weight on the release process from alginate microbeads. in Tehnika
Savez inženjera i tehničara Srbije., 70(3), 401-405.
https://doi.org/10.5937/tehnika1503401I

Ilić-Pajić J, Grujić A, Stijepović MZ, Stajić-Trošić J, Bugarski B. Effect of tracers molecular weight on the release process from alginate microbeads. in Tehnika. 2015;70(3):401-405.
doi:10.5937/tehnika1503401I .

Ilić-Pajić, Jovana, Grujić, Aleksandar, Stijepović, Mirko Z., Stajić-Trošić, Jasna, Bugarski, Branko, "Effect of tracers molecular weight on the release process from alginate microbeads" in Tehnika, 70, no. 3 (2015):401-405,
https://doi.org/10.5937/tehnika1503401I . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stevanović, Marija P.
AU  - Stijepović, Mirko Z.
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stevanović, Jasmina
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1733
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 solution diffusion 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, NSI 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.
AB  - Cilj ovog rada je bio da se konstruiše neporozna kompozitna membrana bazirana na polimernom matriksu koja može da bude upotrebljena za tretman otpadnih gasova. Za ovu svrhu, neophodno je da membrana ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji ne najčešće sreću u produktima sagorevanja (azot, kiseonik, vodonik, metan). Ove membrane pripadaju grupi neporoznih membrana i mehanizam separacije gasova je baziran na rastvorljivosti i difuziji. U ovom radu, testirana je mogućnost primene poli(etilenoksida)-kopoli(ftalamida). Da bi se povećala permeabilnost ugljen-dioksida, dodavana su tri različita zeolitna praha, a da bi se poboljšala kompatibilnost neorganskih čestica i polimernih lanaca, dodat je n-tetradeciltrimetilamonijum-bromid (NTAB). Ispitivani zeoliti pripadaju grupi sa dvodimenzionalnim porama (IHW, NSI i TER). Najbolji rezultati u separaciji ugljen-dioksida i vodonika su postignuti kod membrana baziranim na polimeru PEBAX 1657 i zeolitima uz dodatak aditiva. Sa druge strane, bolja selektivnost je postignuta kod membrana baziranih na Polyactive polimeru.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation
T1  - Mogućnost primene zeolitnih prahova za konstrukciju membrana za izdvajanje ugljen-dioksida
VL  - 21
IS  - 2
SP  - 277
EP  - 284
DO  - 10.2298/CICEQ130924025N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stevanović, Marija P. and Stijepović, Mirko Z. 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 solution diffusion 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, NSI 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., Cilj ovog rada je bio da se konstruiše neporozna kompozitna membrana bazirana na polimernom matriksu koja može da bude upotrebljena za tretman otpadnih gasova. Za ovu svrhu, neophodno je da membrana ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji ne najčešće sreću u produktima sagorevanja (azot, kiseonik, vodonik, metan). Ove membrane pripadaju grupi neporoznih membrana i mehanizam separacije gasova je baziran na rastvorljivosti i difuziji. U ovom radu, testirana je mogućnost primene poli(etilenoksida)-kopoli(ftalamida). Da bi se povećala permeabilnost ugljen-dioksida, dodavana su tri različita zeolitna praha, a da bi se poboljšala kompatibilnost neorganskih čestica i polimernih lanaca, dodat je n-tetradeciltrimetilamonijum-bromid (NTAB). Ispitivani zeoliti pripadaju grupi sa dvodimenzionalnim porama (IHW, NSI i TER). Najbolji rezultati u separaciji ugljen-dioksida i vodonika su postignuti kod membrana baziranim na polimeru PEBAX 1657 i zeolitima uz dodatak aditiva. Sa druge strane, bolja selektivnost je postignuta kod membrana baziranih na Polyactive polimeru.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation, Mogućnost primene zeolitnih prahova za konstrukciju membrana za izdvajanje ugljen-dioksida",
volume = "21",
number = "2",
pages = "277-284",
doi = "10.2298/CICEQ130924025N"
}

Nedeljković, D., Stevanović, M. P., Stijepović, M. Z., 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 and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(2), 277-284.
https://doi.org/10.2298/CICEQ130924025N

Nedeljković D, Stevanović MP, Stijepović MZ, 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 and Chemical Engineering Quarterly / CICEQ. 2015;21(2):277-284.
doi:10.2298/CICEQ130924025N .

Nedeljković, Dragutin, Stevanović, Marija P., Stijepović, Mirko Z., 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 and Chemical Engineering Quarterly / CICEQ, 21, no. 2 (2015):277-284,
https://doi.org/10.2298/CICEQ130924025N . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
AU  - Ilić, J.
AU  - Nedeljković, Dragutin
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3961
AB  - In this study, design of lab scale device for determination of separation properties of membranes is presented and analyzed. Device operates with different gas pressure between chambers, whereby gas streams perpendicular to the membrane. Using appropriate acquisition system and applying mathematical formulas, mechanism for gas transfer through the membrane is determinate. Polymer membranes based on zeolite are synthesized and tested by lab scale device. The membranes with various content of zeolite are tested with CO2 gas until optimal composition of membrane components is established. Beside good mechanical and structural properties of applied membrane, suitable values of permeability with good agreement with the literature data are obtained.
AB  - U ovom radu je prikazano i analizirano konstrukcijsko rešenje laboratorijskog uređaja za određivanje separacionih svojstava membrana. Rad uređaja je baziran na razlici pritisaka između komora, pri čemu gas struji normalno na poprečni presek membrana. Odgovarajućim sistemom za akviziciju podataka i primenom odgovarajućih matematičkih formula određen je mehanizam prenosa kroz membranu. Polimerne membrane na bazi zeolita su sintetizovane i testirane na uređaju. Membrane sa različitim udelim zeolita su testirane na CO2 gas, dok nije ustanovljen optimalan sastav komponenti za sintezu membrana.Pored dobrih mehaničkih i strukturnih svojstava testirane membrane, dobijene su zadovoljavajuće vrednosti permeabilnosti koje su u saglasnosti sa drugim autorima.
PB  - Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology
T2  - Journal of Engineering & Processing Management
T1  - A method for determination of separation properties of membranes
T1  - Metod za određivanje separacionih svojstava membrana
VL  - 7
IS  - 1
SP  - 45
EP  - 54
DO  - 10.7251/JEPMEN1507045G
ER  - 

@article{
author = "Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna and Ilić, J. and Nedeljković, Dragutin",
year = "2015",
abstract = "In this study, design of lab scale device for determination of separation properties of membranes is presented and analyzed. Device operates with different gas pressure between chambers, whereby gas streams perpendicular to the membrane. Using appropriate acquisition system and applying mathematical formulas, mechanism for gas transfer through the membrane is determinate. Polymer membranes based on zeolite are synthesized and tested by lab scale device. The membranes with various content of zeolite are tested with CO2 gas until optimal composition of membrane components is established. Beside good mechanical and structural properties of applied membrane, suitable values of permeability with good agreement with the literature data are obtained., U ovom radu je prikazano i analizirano konstrukcijsko rešenje laboratorijskog uređaja za određivanje separacionih svojstava membrana. Rad uređaja je baziran na razlici pritisaka između komora, pri čemu gas struji normalno na poprečni presek membrana. Odgovarajućim sistemom za akviziciju podataka i primenom odgovarajućih matematičkih formula određen je mehanizam prenosa kroz membranu. Polimerne membrane na bazi zeolita su sintetizovane i testirane na uređaju. Membrane sa različitim udelim zeolita su testirane na CO2 gas, dok nije ustanovljen optimalan sastav komponenti za sintezu membrana.Pored dobrih mehaničkih i strukturnih svojstava testirane membrane, dobijene su zadovoljavajuće vrednosti permeabilnosti koje su u saglasnosti sa drugim autorima.",
publisher = "Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology",
journal = "Journal of Engineering & Processing Management",
title = "A method for determination of separation properties of membranes, Metod za određivanje separacionih svojstava membrana",
volume = "7",
number = "1",
pages = "45-54",
doi = "10.7251/JEPMEN1507045G"
}

Grujić, A., Stijepović, M., Stajić-Trošić, J., Ilić, J.,& Nedeljković, D.. (2015). A method for determination of separation properties of membranes. in Journal of Engineering & Processing Management
Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology., 7(1), 45-54.
https://doi.org/10.7251/JEPMEN1507045G

Grujić A, Stijepović M, Stajić-Trošić J, Ilić J, Nedeljković D. A method for determination of separation properties of membranes. in Journal of Engineering & Processing Management. 2015;7(1):45-54.
doi:10.7251/JEPMEN1507045G .

Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, Ilić, J., Nedeljković, Dragutin, "A method for determination of separation properties of membranes" in Journal of Engineering & Processing Management, 7, no. 1 (2015):45-54,
https://doi.org/10.7251/JEPMEN1507045G . .

TY  - JOUR
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko Z.
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Žak, Tomas
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1476
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  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Magnetic behaviour of hybrid magnetic composite materials
T1  - Magnetno ponašanje hibridnih magnetnih kompozitnih materijala
VL  - 55
IS  - 2
SP  - 170
EP  - 172
DO  - 10.5937/ZasMat1402170S
ER  - 

@article{
author = "Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko Z. and Nedeljković, Dragutin and Stajčić, Aleksandar and Žak, Tomas",
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 = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Magnetic behaviour of hybrid magnetic composite materials, Magnetno ponašanje hibridnih magnetnih kompozitnih materijala",
volume = "55",
number = "2",
pages = "170-172",
doi = "10.5937/ZasMat1402170S"
}

Stajić-Trošić, J., Grujić, A., Stijepović, M. Z., Nedeljković, D., Stajčić, A.,& Žak, T.. (2014). Magnetic behaviour of hybrid magnetic composite materials. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 55(2), 170-172.
https://doi.org/10.5937/ZasMat1402170S

Stajić-Trošić J, Grujić A, Stijepović MZ, Nedeljković D, Stajčić A, Žak 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 Z., Nedeljković, Dragutin, Stajčić, Aleksandar, Žak, Tomas, "Magnetic behaviour of hybrid magnetic composite materials" in Zaštita materijala, 55, no. 2 (2014):170-172,
https://doi.org/10.5937/ZasMat1402170S . .

TY  - JOUR
AU  - Stijepović, Mirko Z.
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Grujić, Aleksandar
AU  - Seferlis, Panos
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1563
AB  - This work adopts the (ECCs) under bar (exergy composite curves) approach to explore the potential for ORC (organic Rankine cycle) process improvements. The method is used to explore different ORC configurations supported by a mathematical model representing a generic multi-pressure ORC cascade and developed based on the principles of the ECCs method. The model facilitates interconnectivity at different temperature and pressure levels, also considering two types of turbines, namely an expansion and an induction turbine. It is employed to investigate the performance of two major ORC configurations, namely one considering independent pressure loops with an expansion turbine and the other considering pressure loops contacted through induction turbines. These configurations are updated with new features within an iterative procedure supporting the systematic identification of the optimum number of pressure loops together with several operating optimization parameters. The optimization is performed using an inclusive objective function, while the obtained results indicate ORC systems of high performance.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Energy
T1  - An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes
VL  - 69
SP  - 285
EP  - 298
DO  - 10.1016/j.energy.2014.03.006
ER  - 

@article{
author = "Stijepović, Mirko Z. and Papadopoulos, Athanasios I. and Linke, Patrick and Grujić, Aleksandar and Seferlis, Panos",
year = "2014",
abstract = "This work adopts the (ECCs) under bar (exergy composite curves) approach to explore the potential for ORC (organic Rankine cycle) process improvements. The method is used to explore different ORC configurations supported by a mathematical model representing a generic multi-pressure ORC cascade and developed based on the principles of the ECCs method. The model facilitates interconnectivity at different temperature and pressure levels, also considering two types of turbines, namely an expansion and an induction turbine. It is employed to investigate the performance of two major ORC configurations, namely one considering independent pressure loops with an expansion turbine and the other considering pressure loops contacted through induction turbines. These configurations are updated with new features within an iterative procedure supporting the systematic identification of the optimum number of pressure loops together with several operating optimization parameters. The optimization is performed using an inclusive objective function, while the obtained results indicate ORC systems of high performance.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Energy",
title = "An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes",
volume = "69",
pages = "285-298",
doi = "10.1016/j.energy.2014.03.006"
}

Stijepović, M. Z., Papadopoulos, A. I., Linke, P., Grujić, A.,& Seferlis, P.. (2014). An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes. in Energy
Oxford : Pergamon-Elsevier Science Ltd., 69, 285-298.
https://doi.org/10.1016/j.energy.2014.03.006

Stijepović MZ, Papadopoulos AI, Linke P, Grujić A, Seferlis P. An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes. in Energy. 2014;69:285-298.
doi:10.1016/j.energy.2014.03.006 .

Stijepović, Mirko Z., Papadopoulos, Athanasios I., Linke, Patrick, Grujić, Aleksandar, Seferlis, Panos, "An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes" in Energy, 69 (2014):285-298,
https://doi.org/10.1016/j.energy.2014.03.006 . .

TY  - CHAP
AU  - Stijepović, Mirko Z.
AU  - Papadopoulos, A.I.
AU  - Linke, P.
AU  - Grujić, Aleksandar
AU  - Seferlis, P.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1604
AB  - This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.
PB  - Elsevier
T2  - Computer Aided Chemical Engineering
T1  - Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems
VL  - 33
SP  - 109
EP  - 114
DO  - 10.1016/B978-0-444-63456-6.50019-3
ER  - 

@inbook{
author = "Stijepović, Mirko Z. and Papadopoulos, A.I. and Linke, P. and Grujić, Aleksandar and Seferlis, P.",
year = "2014",
abstract = "This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.",
publisher = "Elsevier",
journal = "Computer Aided Chemical Engineering",
booktitle = "Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems",
volume = "33",
pages = "109-114",
doi = "10.1016/B978-0-444-63456-6.50019-3"
}

Stijepović, M. Z., Papadopoulos, A.I., Linke, P., Grujić, A.,& Seferlis, P.. (2014). Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems. in Computer Aided Chemical Engineering
Elsevier., 33, 109-114.
https://doi.org/10.1016/B978-0-444-63456-6.50019-3

Stijepović MZ, Papadopoulos A, Linke P, Grujić A, Seferlis P. Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems. in Computer Aided Chemical Engineering. 2014;33:109-114.
doi:10.1016/B978-0-444-63456-6.50019-3 .

Stijepović, Mirko Z., Papadopoulos, A.I., Linke, P., Grujić, Aleksandar, Seferlis, P., "Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems" in Computer Aided Chemical Engineering, 33 (2014):109-114,
https://doi.org/10.1016/B978-0-444-63456-6.50019-3 . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko Z.
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Stevanović, Jasmina
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1163
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  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Polymer bonded magnetic composites based on Nd-Fe-B
T1  - Polimerni magnetni kompoziti na bazi Nd-Fe-B
VL  - 54
IS  - 4
SP  - 361
EP  - 365
UR  - https://hdl.handle.net/21.15107/rcub_cer_1163
ER  - 

@article{
author = "Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko Z. 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 = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Polymer bonded magnetic composites based on Nd-Fe-B, Polimerni magnetni kompoziti na bazi Nd-Fe-B",
volume = "54",
number = "4",
pages = "361-365",
url = "https://hdl.handle.net/21.15107/rcub_cer_1163"
}

Grujić, A., Stajić-Trošić, J., Stijepović, M. Z., Nedeljković, D., Stajčić, A.,& Stevanović, J.. (2013). Polymer bonded magnetic composites based on Nd-Fe-B. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 54(4), 361-365.
https://hdl.handle.net/21.15107/rcub_cer_1163

Grujić A, Stajić-Trošić J, Stijepović MZ, 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_cer_1163 .

Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko Z., 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_cer_1163 .