Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200325 (Military Technical Institute - MTI, Belgrade)

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Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200325 (Military Technical Institute - MTI, Belgrade) (en)
Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije, Ugovor br. 451-03-68/2020-14/200325 (Vojnotehnički institut - VTI, Beograd) (sr_RS)
Министарство просвете, науке и технолошког развоја Републике Србије, Уговор бр. 451-03-68/2020-14/200325 (Војнотехнички институт - ВТИ, Београд) (sr)
Authors

Publications

Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles

Salah Adeen Embirsh, Hifa; Stajčić, Ivana; Gržetić, Jelena; Mladenović, Ivana O.; Anđelković, Boban; Marinković, Aleksandar; Vuksanović, Marija M.

(MDPI, 2023)

TY  - JOUR
AU  - Salah Adeen Embirsh, Hifa
AU  - Stajčić, Ivana
AU  - Gržetić, Jelena
AU  - Mladenović, Ivana O.
AU  - Anđelković, Boban
AU  - Marinković, Aleksandar
AU  - Vuksanović, Marija M.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6610
AB  - This paper presents sustainable technology for environmentally friendly composite production. Biobased unsaturated polyester resin (b-UPR), synthesized from waste polyethylene terephthalate (PET) glycosylate and renewable origin maleic anhydride (MAnh) and propylene glycol
(PG), was reinforced with unmodified and vinyl-modified biosilica nanoparticles obtained from
rice husk. The structural and morphological properties of the obtained particles, b-UPR, as well as
composites, were characterized by Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic
resonance spectroscopy (NMR), scanning electron microscopy (SEM), and transmission electron
microscopy (TEM) techniques. The study of the influence of biosilica modification on the mechanical
properties of composites was supported by hardness modeling. Improvement of the tensile strength
of the b-UPR-based composite at 2.5 wt.% addition of biosilica modified with vinyl silane, named
“b-UPR/SiO2
-V” composite, has been achieved with 88% increase. The thermal aging process applied
to the b-UPR/SiO2
-V composite, which simulates use over the product’s lifetime, leads to the deterioration of composites that were used as fillers in commercial unsaturated polyester resin (c-UPR).
The grinded artificially aged b-UPR composites were used as filler in c-UPR for the production of a
table top layer with outstanding mechanical properties, i.e., impact resistance and microhardness, as
well as fire resistance rated in the V-0 category according to the UL-94 test. Developing sustainable
composites that are chemically synthesized from renewable sources is important from the aspect of
preserving the environment and existing resources as well as the extending their life cycle.
PB  - MDPI
T2  - Polymers
T1  - Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles
VL  - 15
IS  - 18
SP  - 3756
DO  - 10.3390/polym15183756
ER  - 
@article{
author = "Salah Adeen Embirsh, Hifa and Stajčić, Ivana and Gržetić, Jelena and Mladenović, Ivana O. and Anđelković, Boban and Marinković, Aleksandar and Vuksanović, Marija M.",
year = "2023",
abstract = "This paper presents sustainable technology for environmentally friendly composite production. Biobased unsaturated polyester resin (b-UPR), synthesized from waste polyethylene terephthalate (PET) glycosylate and renewable origin maleic anhydride (MAnh) and propylene glycol
(PG), was reinforced with unmodified and vinyl-modified biosilica nanoparticles obtained from
rice husk. The structural and morphological properties of the obtained particles, b-UPR, as well as
composites, were characterized by Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic
resonance spectroscopy (NMR), scanning electron microscopy (SEM), and transmission electron
microscopy (TEM) techniques. The study of the influence of biosilica modification on the mechanical
properties of composites was supported by hardness modeling. Improvement of the tensile strength
of the b-UPR-based composite at 2.5 wt.% addition of biosilica modified with vinyl silane, named
“b-UPR/SiO2
-V” composite, has been achieved with 88% increase. The thermal aging process applied
to the b-UPR/SiO2
-V composite, which simulates use over the product’s lifetime, leads to the deterioration of composites that were used as fillers in commercial unsaturated polyester resin (c-UPR).
The grinded artificially aged b-UPR composites were used as filler in c-UPR for the production of a
table top layer with outstanding mechanical properties, i.e., impact resistance and microhardness, as
well as fire resistance rated in the V-0 category according to the UL-94 test. Developing sustainable
composites that are chemically synthesized from renewable sources is important from the aspect of
preserving the environment and existing resources as well as the extending their life cycle.",
publisher = "MDPI",
journal = "Polymers",
title = "Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles",
volume = "15",
number = "18",
pages = "3756",
doi = "10.3390/polym15183756"
}
Salah Adeen Embirsh, H., Stajčić, I., Gržetić, J., Mladenović, I. O., Anđelković, B., Marinković, A.,& Vuksanović, M. M.. (2023). Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles. in Polymers
MDPI., 15(18), 3756.
https://doi.org/10.3390/polym15183756
Salah Adeen Embirsh H, Stajčić I, Gržetić J, Mladenović IO, Anđelković B, Marinković A, Vuksanović MM. Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles. in Polymers. 2023;15(18):3756.
doi:10.3390/polym15183756 .
Salah Adeen Embirsh, Hifa, Stajčić, Ivana, Gržetić, Jelena, Mladenović, Ivana O., Anđelković, Boban, Marinković, Aleksandar, Vuksanović, Marija M., "Synthesis, Characterization and Application of Biobased Unsaturated Polyester Resin Reinforced with Unmodified/Modified Biosilica Nanoparticles" in Polymers, 15, no. 18 (2023):3756,
https://doi.org/10.3390/polym15183756 . .
6

Quality of explosively welded steel plates using demex explosive

Lazarević, Miloš; Bajić, Danica; Timotijević, Mladen; Alil, Ana; Ilić, Nada; Nedić, Bogdan

(Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) - Društvo za procesnu tehniku, 2023)

TY  - CONF
AU  - Lazarević, Miloš
AU  - Bajić, Danica
AU  - Timotijević, Mladen
AU  - Alil, Ana
AU  - Ilić, Nada
AU  - Nedić, Bogdan
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6431
AB  - Заваривање експлозивом се често користи када конвенционалне методе заваривања не
могу да обезбеде заварени спој два различита материјала, али и када треба заварити неку
специфичну геометрију или велике површине металних плоча. Остваривање споја код
заваривања експлозивом се заснива на динамичком дејству великог притиска створеног
екплозијом. У ту сврху најчешће се користе индустријски експлозиви ниских параметара
детонације, а један од њих је DEMEX, произвођача TRAYAL, из Србије. У овом истраживању
DEMEX је примењен за заваривање плоча две различите врсте челика. Пре
експерименталног поступка заваривања одабраних металних плоча, експлозив добијен од
произвођача је подвргнут улазној контроли квалитета: мерењу његове насипне густине и
брзине детонације, коришћењем оптичких сонди и фотодетектора повезаног са
електронским бројачем. Експериментална поставка за заваривање била је следећа:
експлозив DEMEX у прашкастом стању нанесен је у равномерном слоју преко горње челичне
плоче, која је хоризонтално постављена преко доње плоче од друге врсте челика, у
паралелном положају, са малим дрвеним дистанцерима ивично постављеним између њих.
Активација је извршена електродетонирајућом капислом и малим бустером од пластичног
експлозива. Заварени спој је испитан применом метода ултразвучне дефектоскопије,
течним пенетрантима и микроструктурне анализе завареног споја. Микроструктурне
анализе попречног пресека заварених плоча урађене су на стерео и оптичом микроскопу како
би се анализирала зона завареног споја.
AB  - Explosion welding is often used when conventional welding methods cannot provide welded
joint of two dissimilar materials, but also when some specific geometry should be welded, or large
surfaces of metal plates. The formation of a joint in explosive welding is based on the dynamic effect
of the high pressure created by the explosion. For this purpose, most often some industrial explosives
of low detonation parameters are used, and one of them is DEMEX, produced by TRAYAL,
Serbia. In this research DEMEX was applied to weld plates of two different types of steel. Prior to
the experimental procedure of welding, the selected metal plates, the explosive obtained from the
producer was subjected to initial quality control: measurement of its bulk density and detonation
velocity, using optical probes and a photodetector connected with an electronic counter. The experimental
setup for welding was as follows: explosive DEMEX in powdery state was applied in a uniform
layer over the upper plate, which was horizontally placed over the lower plate, in parallel
position, with small wooden spacers, marginally placed between them. Activation was performed by
an electro-detonating cap and a small booster of plastic explosive. The welded joint was examined
using methods of ultrasonic defectoscopy, liquid penetrants testing and microstructural analysis of
the welded joint. Cross-sectional microstructural analyses of the welded plates were performed
using a stereo and optical microscope to analyze the weld zone.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) - Društvo za procesnu tehniku
C3  - Proceedings - 36th international congress on process industry, Procesing ’23 / Zbornik radova - 36. Međunarodni kongres o procesnoj industriji, Procesing ’23, 1. i 2. jun 2023, Centar za stručno usavršavanje, Šabac
T1  - Quality of explosively welded steel plates using demex explosive
SP  - 245
EP  - 251
UR  - https://hdl.handle.net/21.15107/rcub_cer_6431
ER  - 
@conference{
author = "Lazarević, Miloš and Bajić, Danica and Timotijević, Mladen and Alil, Ana and Ilić, Nada and Nedić, Bogdan",
year = "2023",
abstract = "Заваривање експлозивом се често користи када конвенционалне методе заваривања не
могу да обезбеде заварени спој два различита материјала, али и када треба заварити неку
специфичну геометрију или велике површине металних плоча. Остваривање споја код
заваривања експлозивом се заснива на динамичком дејству великог притиска створеног
екплозијом. У ту сврху најчешће се користе индустријски експлозиви ниских параметара
детонације, а један од њих је DEMEX, произвођача TRAYAL, из Србије. У овом истраживању
DEMEX је примењен за заваривање плоча две различите врсте челика. Пре
експерименталног поступка заваривања одабраних металних плоча, експлозив добијен од
произвођача је подвргнут улазној контроли квалитета: мерењу његове насипне густине и
брзине детонације, коришћењем оптичких сонди и фотодетектора повезаног са
електронским бројачем. Експериментална поставка за заваривање била је следећа:
експлозив DEMEX у прашкастом стању нанесен је у равномерном слоју преко горње челичне
плоче, која је хоризонтално постављена преко доње плоче од друге врсте челика, у
паралелном положају, са малим дрвеним дистанцерима ивично постављеним између њих.
Активација је извршена електродетонирајућом капислом и малим бустером од пластичног
експлозива. Заварени спој је испитан применом метода ултразвучне дефектоскопије,
течним пенетрантима и микроструктурне анализе завареног споја. Микроструктурне
анализе попречног пресека заварених плоча урађене су на стерео и оптичом микроскопу како
би се анализирала зона завареног споја., Explosion welding is often used when conventional welding methods cannot provide welded
joint of two dissimilar materials, but also when some specific geometry should be welded, or large
surfaces of metal plates. The formation of a joint in explosive welding is based on the dynamic effect
of the high pressure created by the explosion. For this purpose, most often some industrial explosives
of low detonation parameters are used, and one of them is DEMEX, produced by TRAYAL,
Serbia. In this research DEMEX was applied to weld plates of two different types of steel. Prior to
the experimental procedure of welding, the selected metal plates, the explosive obtained from the
producer was subjected to initial quality control: measurement of its bulk density and detonation
velocity, using optical probes and a photodetector connected with an electronic counter. The experimental
setup for welding was as follows: explosive DEMEX in powdery state was applied in a uniform
layer over the upper plate, which was horizontally placed over the lower plate, in parallel
position, with small wooden spacers, marginally placed between them. Activation was performed by
an electro-detonating cap and a small booster of plastic explosive. The welded joint was examined
using methods of ultrasonic defectoscopy, liquid penetrants testing and microstructural analysis of
the welded joint. Cross-sectional microstructural analyses of the welded plates were performed
using a stereo and optical microscope to analyze the weld zone.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) - Društvo za procesnu tehniku",
journal = "Proceedings - 36th international congress on process industry, Procesing ’23 / Zbornik radova - 36. Međunarodni kongres o procesnoj industriji, Procesing ’23, 1. i 2. jun 2023, Centar za stručno usavršavanje, Šabac",
title = "Quality of explosively welded steel plates using demex explosive",
pages = "245-251",
url = "https://hdl.handle.net/21.15107/rcub_cer_6431"
}
Lazarević, M., Bajić, D., Timotijević, M., Alil, A., Ilić, N.,& Nedić, B.. (2023). Quality of explosively welded steel plates using demex explosive. in Proceedings - 36th international congress on process industry, Procesing ’23 / Zbornik radova - 36. Međunarodni kongres o procesnoj industriji, Procesing ’23, 1. i 2. jun 2023, Centar za stručno usavršavanje, Šabac
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) - Društvo za procesnu tehniku., 245-251.
https://hdl.handle.net/21.15107/rcub_cer_6431
Lazarević M, Bajić D, Timotijević M, Alil A, Ilić N, Nedić B. Quality of explosively welded steel plates using demex explosive. in Proceedings - 36th international congress on process industry, Procesing ’23 / Zbornik radova - 36. Međunarodni kongres o procesnoj industriji, Procesing ’23, 1. i 2. jun 2023, Centar za stručno usavršavanje, Šabac. 2023;:245-251.
https://hdl.handle.net/21.15107/rcub_cer_6431 .
Lazarević, Miloš, Bajić, Danica, Timotijević, Mladen, Alil, Ana, Ilić, Nada, Nedić, Bogdan, "Quality of explosively welded steel plates using demex explosive" in Proceedings - 36th international congress on process industry, Procesing ’23 / Zbornik radova - 36. Međunarodni kongres o procesnoj industriji, Procesing ’23, 1. i 2. jun 2023, Centar za stručno usavršavanje, Šabac (2023):245-251,
https://hdl.handle.net/21.15107/rcub_cer_6431 .

Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study

Salih, Rabab; Veličković, Zlate; Milošević, Milena; Pavlović, Vera P.; Cvijetić, Ilija; Sofrenić, Ivana V.; Gržetić, Jelena; Marinković, Aleksandar

(Elsevier, 2023)

TY  - JOUR
AU  - Salih, Rabab
AU  - Veličković, Zlate
AU  - Milošević, Milena
AU  - Pavlović, Vera P.
AU  - Cvijetić, Ilija
AU  - Sofrenić, Ivana V.
AU  - Gržetić, Jelena
AU  - Marinković, Aleksandar
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5777
AB  - Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.
PB  - Elsevier
T2  - Journal of Environmental Management
T1  - Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study
VL  - 326
SP  - 116838
DO  - 10.1016/j.jenvman.2022.116838
ER  - 
@article{
author = "Salih, Rabab and Veličković, Zlate and Milošević, Milena and Pavlović, Vera P. and Cvijetić, Ilija and Sofrenić, Ivana V. and Gržetić, Jelena and Marinković, Aleksandar",
year = "2023",
abstract = "Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.",
publisher = "Elsevier",
journal = "Journal of Environmental Management",
title = "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study",
volume = "326",
pages = "116838",
doi = "10.1016/j.jenvman.2022.116838"
}
Salih, R., Veličković, Z., Milošević, M., Pavlović, V. P., Cvijetić, I., Sofrenić, I. V., Gržetić, J.,& Marinković, A.. (2023). Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management
Elsevier., 326, 116838.
https://doi.org/10.1016/j.jenvman.2022.116838
Salih R, Veličković Z, Milošević M, Pavlović VP, Cvijetić I, Sofrenić IV, Gržetić J, Marinković A. Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management. 2023;326:116838.
doi:10.1016/j.jenvman.2022.116838 .
Salih, Rabab, Veličković, Zlate, Milošević, Milena, Pavlović, Vera P., Cvijetić, Ilija, Sofrenić, Ivana V., Gržetić, Jelena, Marinković, Aleksandar, "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study" in Journal of Environmental Management, 326 (2023):116838,
https://doi.org/10.1016/j.jenvman.2022.116838 . .
17
14

Properties of aluminium-steel plates explosively welded using Amonex

Lazarević, Miloš; Živković, Bogdan; Bajić, Danica; Alil, Ana; Tomić, Ljubiša; Nedić, Bogdan

(Društvo za integritet i vek konstrukcija, 2023)

TY  - JOUR
AU  - Lazarević, Miloš
AU  - Živković, Bogdan
AU  - Bajić, Danica
AU  - Alil, Ana
AU  - Tomić, Ljubiša
AU  - Nedić, Bogdan
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6448
AB  - The aim of this study was to investigate the possibility to
use the industrial explosive Amonex, which belongs to a
group of low-to-middle detonation velocity explosives, for
welding of metallic materials. It consists of ammonium
nitrate and TNT as energetic components and other inert
ingredients and has a powdery consistency, easily applicable in a desirable layer over the metal plates to be welded.
Within this research, Amonex was applied to weld plates of
aluminium Al 2024 and steel 1.0216 (according to EN
10027-2). The procedure of welding was carried out in the
configuration of parallel plates, and afterwards the welded
joint was examined. Ultrasonic method and infrared imaging were used as non-destructive techniques, and then the
samples were cut from the welded plate using water-jet, in
order to perform microscopic analyses of the cross-section
in the joint area. It was observed that a good-quality welded
joint was obtained, and that the selected explosive may find
further application in this area. However, certain nonwelded area was observed, encouraging future modification
of the welding procedure set-up.
AB  - Cilj ove studije je ispitivanje mogućnosti upotrebe industrijskog eksploziva Amonex, koji pripada grupi eksploziva
male-do-srednje brzine detonacije, za zavarivanje metalnih
materijala. Ovaj eksploziv se sastoji od amonijum nitrata i
TNT-a kao energetskih komponenti i drugih inertnih sastojaka, ima praškastu strukturu i lako se nanosi u željenom
sloju preko metalnih ploča koje se zavaruju. U okviru ovog
istraživanja, Amonex je primenjen na zavarenim pločama
aluminijuma Al 2024 i čelika 1.0216 (oznake prema EN
10027-2). Postupak zavarivanja izveden je na paralelno
postavljenim pločama, nakon čega je izvršen pregled zavarenog spoja. Kao metode IBR korišćene su ultrazvučna
metoda i termovizijsko ispitivanje. Primenom vodenog mlaza
iz zavarene ploče su isečeni uzorci u cilju ispitivanja mikrostrukture poprečnog preseka zavarenog spoja. Uočeno je
da je dobijen kvalitetan zavareni spoj, te da odabrani
eksploziv može naći dalju primenu u ovoj oblasti. Međutim,
takođe su uočene i određene površine nezavarenog područja,
što je nametnulo potrebu za izmenama postavke ovog
postupka zavarivanja.
PB  - Društvo za integritet i vek konstrukcija
T2  - Structural integrity and life
T1  - Properties of aluminium-steel plates explosively welded using Amonex
T1  - Osobine eksplozivno zavarenih ploča aluminijuma i čelika upotrebom Amonex eksploziva
VL  - 23
IS  - 2
SP  - 141
EP  - 146
UR  - https://hdl.handle.net/21.15107/rcub_cer_6448
ER  - 
@article{
author = "Lazarević, Miloš and Živković, Bogdan and Bajić, Danica and Alil, Ana and Tomić, Ljubiša and Nedić, Bogdan",
year = "2023",
abstract = "The aim of this study was to investigate the possibility to
use the industrial explosive Amonex, which belongs to a
group of low-to-middle detonation velocity explosives, for
welding of metallic materials. It consists of ammonium
nitrate and TNT as energetic components and other inert
ingredients and has a powdery consistency, easily applicable in a desirable layer over the metal plates to be welded.
Within this research, Amonex was applied to weld plates of
aluminium Al 2024 and steel 1.0216 (according to EN
10027-2). The procedure of welding was carried out in the
configuration of parallel plates, and afterwards the welded
joint was examined. Ultrasonic method and infrared imaging were used as non-destructive techniques, and then the
samples were cut from the welded plate using water-jet, in
order to perform microscopic analyses of the cross-section
in the joint area. It was observed that a good-quality welded
joint was obtained, and that the selected explosive may find
further application in this area. However, certain nonwelded area was observed, encouraging future modification
of the welding procedure set-up., Cilj ove studije je ispitivanje mogućnosti upotrebe industrijskog eksploziva Amonex, koji pripada grupi eksploziva
male-do-srednje brzine detonacije, za zavarivanje metalnih
materijala. Ovaj eksploziv se sastoji od amonijum nitrata i
TNT-a kao energetskih komponenti i drugih inertnih sastojaka, ima praškastu strukturu i lako se nanosi u željenom
sloju preko metalnih ploča koje se zavaruju. U okviru ovog
istraživanja, Amonex je primenjen na zavarenim pločama
aluminijuma Al 2024 i čelika 1.0216 (oznake prema EN
10027-2). Postupak zavarivanja izveden je na paralelno
postavljenim pločama, nakon čega je izvršen pregled zavarenog spoja. Kao metode IBR korišćene su ultrazvučna
metoda i termovizijsko ispitivanje. Primenom vodenog mlaza
iz zavarene ploče su isečeni uzorci u cilju ispitivanja mikrostrukture poprečnog preseka zavarenog spoja. Uočeno je
da je dobijen kvalitetan zavareni spoj, te da odabrani
eksploziv može naći dalju primenu u ovoj oblasti. Međutim,
takođe su uočene i određene površine nezavarenog područja,
što je nametnulo potrebu za izmenama postavke ovog
postupka zavarivanja.",
publisher = "Društvo za integritet i vek konstrukcija",
journal = "Structural integrity and life",
title = "Properties of aluminium-steel plates explosively welded using Amonex, Osobine eksplozivno zavarenih ploča aluminijuma i čelika upotrebom Amonex eksploziva",
volume = "23",
number = "2",
pages = "141-146",
url = "https://hdl.handle.net/21.15107/rcub_cer_6448"
}
Lazarević, M., Živković, B., Bajić, D., Alil, A., Tomić, L.,& Nedić, B.. (2023). Properties of aluminium-steel plates explosively welded using Amonex. in Structural integrity and life
Društvo za integritet i vek konstrukcija., 23(2), 141-146.
https://hdl.handle.net/21.15107/rcub_cer_6448
Lazarević M, Živković B, Bajić D, Alil A, Tomić L, Nedić B. Properties of aluminium-steel plates explosively welded using Amonex. in Structural integrity and life. 2023;23(2):141-146.
https://hdl.handle.net/21.15107/rcub_cer_6448 .
Lazarević, Miloš, Živković, Bogdan, Bajić, Danica, Alil, Ana, Tomić, Ljubiša, Nedić, Bogdan, "Properties of aluminium-steel plates explosively welded using Amonex" in Structural integrity and life, 23, no. 2 (2023):141-146,
https://hdl.handle.net/21.15107/rcub_cer_6448 .

Long-term stability of graphene/c-Si Schottky-junction solar cells

Jovanović, Djordje; Petrović, Miloš; Tomašević-Ilić, Tijana; Matković, Aleksandar; Bokalič, Matevž; Spasenović, Marko; Rogdakis, Konstantinos; Kymakis, Emmannuel; Knežević, Dragan; Cina, Lucio; Gajić, Radoš

(Elsevier, 2023)

TY  - JOUR
AU  - Jovanović, Djordje
AU  - Petrović, Miloš
AU  - Tomašević-Ilić, Tijana
AU  - Matković, Aleksandar
AU  - Bokalič, Matevž
AU  - Spasenović, Marko
AU  - Rogdakis, Konstantinos
AU  - Kymakis, Emmannuel
AU  - Knežević, Dragan
AU  - Cina, Lucio
AU  - Gajić, Radoš
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6491
AB  - A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.
PB  - Elsevier
T2  - Solar Energy Materials and Solar Cells
T1  - Long-term stability of graphene/c-Si Schottky-junction solar cells
VL  - 258
SP  - 112414
DO  - 10.1016/j.solmat.2023.112414
ER  - 
@article{
author = "Jovanović, Djordje and Petrović, Miloš and Tomašević-Ilić, Tijana and Matković, Aleksandar and Bokalič, Matevž and Spasenović, Marko and Rogdakis, Konstantinos and Kymakis, Emmannuel and Knežević, Dragan and Cina, Lucio and Gajić, Radoš",
year = "2023",
abstract = "A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.",
publisher = "Elsevier",
journal = "Solar Energy Materials and Solar Cells",
title = "Long-term stability of graphene/c-Si Schottky-junction solar cells",
volume = "258",
pages = "112414",
doi = "10.1016/j.solmat.2023.112414"
}
Jovanović, D., Petrović, M., Tomašević-Ilić, T., Matković, A., Bokalič, M., Spasenović, M., Rogdakis, K., Kymakis, E., Knežević, D., Cina, L.,& Gajić, R.. (2023). Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells
Elsevier., 258, 112414.
https://doi.org/10.1016/j.solmat.2023.112414
Jovanović D, Petrović M, Tomašević-Ilić T, Matković A, Bokalič M, Spasenović M, Rogdakis K, Kymakis E, Knežević D, Cina L, Gajić R. Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells. 2023;258:112414.
doi:10.1016/j.solmat.2023.112414 .
Jovanović, Djordje, Petrović, Miloš, Tomašević-Ilić, Tijana, Matković, Aleksandar, Bokalič, Matevž, Spasenović, Marko, Rogdakis, Konstantinos, Kymakis, Emmannuel, Knežević, Dragan, Cina, Lucio, Gajić, Radoš, "Long-term stability of graphene/c-Si Schottky-junction solar cells" in Solar Energy Materials and Solar Cells, 258 (2023):112414,
https://doi.org/10.1016/j.solmat.2023.112414 . .
2

Long-term stability of graphene/c-Si Schottky-junction solar cells

Jovanović, Djordje; Petrović, Miloš; Tomašević-Ilić, Tijana; Matković, Aleksandar; Bokalič, Matevž; Spasenović, Marko; Rogdakis, Konstantinos; Kymakis, Emmannuel; Knežević, Dragan; Cina, Lucio; Gajić, Radoš

(Elsevier, 2023)

TY  - JOUR
AU  - Jovanović, Djordje
AU  - Petrović, Miloš
AU  - Tomašević-Ilić, Tijana
AU  - Matković, Aleksandar
AU  - Bokalič, Matevž
AU  - Spasenović, Marko
AU  - Rogdakis, Konstantinos
AU  - Kymakis, Emmannuel
AU  - Knežević, Dragan
AU  - Cina, Lucio
AU  - Gajić, Radoš
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6490
AB  - A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.
PB  - Elsevier
T2  - Solar Energy Materials and Solar Cells
T1  - Long-term stability of graphene/c-Si Schottky-junction solar cells
VL  - 258
SP  - 112414
DO  - 10.1016/j.solmat.2023.112414
ER  - 
@article{
author = "Jovanović, Djordje and Petrović, Miloš and Tomašević-Ilić, Tijana and Matković, Aleksandar and Bokalič, Matevž and Spasenović, Marko and Rogdakis, Konstantinos and Kymakis, Emmannuel and Knežević, Dragan and Cina, Lucio and Gajić, Radoš",
year = "2023",
abstract = "A long operational lifetime is required for the use of solar cells in real-life photovoltaic applications. The optimization of operational lifetimes is achieved through understanding the inherent degradation phenomena in solar cells. In this study, graphene/Si Schottky-junction solar cells were produced, utilizing liquid-phase-exfoliated graphene as an active surface. The operational and interface stability of these solar cells over a period of 5 years in ambient conditions (following ISOS-D protocols: dark storage/shelf life) was examined, and the origin of their degradation was reported. It was found that the dominant degradation mechanism could be attributed to the degradation of silver contacts. This was indicated by a decrease in shunt resistance, an increase in the ideality factor (due to a higher carrier recombination), and a constant defect density in graphene films for up to 4 years. Measurements across the solar cell's active area during the 5-year period revealed neither significant spatial inhomogeneity, nor shunt channel defects.",
publisher = "Elsevier",
journal = "Solar Energy Materials and Solar Cells",
title = "Long-term stability of graphene/c-Si Schottky-junction solar cells",
volume = "258",
pages = "112414",
doi = "10.1016/j.solmat.2023.112414"
}
Jovanović, D., Petrović, M., Tomašević-Ilić, T., Matković, A., Bokalič, M., Spasenović, M., Rogdakis, K., Kymakis, E., Knežević, D., Cina, L.,& Gajić, R.. (2023). Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells
Elsevier., 258, 112414.
https://doi.org/10.1016/j.solmat.2023.112414
Jovanović D, Petrović M, Tomašević-Ilić T, Matković A, Bokalič M, Spasenović M, Rogdakis K, Kymakis E, Knežević D, Cina L, Gajić R. Long-term stability of graphene/c-Si Schottky-junction solar cells. in Solar Energy Materials and Solar Cells. 2023;258:112414.
doi:10.1016/j.solmat.2023.112414 .
Jovanović, Djordje, Petrović, Miloš, Tomašević-Ilić, Tijana, Matković, Aleksandar, Bokalič, Matevž, Spasenović, Marko, Rogdakis, Konstantinos, Kymakis, Emmannuel, Knežević, Dragan, Cina, Lucio, Gajić, Radoš, "Long-term stability of graphene/c-Si Schottky-junction solar cells" in Solar Energy Materials and Solar Cells, 258 (2023):112414,
https://doi.org/10.1016/j.solmat.2023.112414 . .
2

Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines

Vujatović, Tamara B.; Vitorović - Todorović, Maja D.; Cvijetić, Ilija; Vasović, Tamara; Nikolić, Milan R.; Novaković, Irena; Bjelogrlić, Snežana

(Elsevier, 2022)

TY  - JOUR
AU  - Vujatović, Tamara B.
AU  - Vitorović - Todorović, Maja D.
AU  - Cvijetić, Ilija
AU  - Vasović, Tamara
AU  - Nikolić, Milan R.
AU  - Novaković, Irena
AU  - Bjelogrlić, Snežana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4853
AB  - In the present work, the α, β-double bond of the aroylacrylic acid phenylamides was suitably modified to optimize the toxicity–antiproliferative activity ratio of the resulting compounds 1 –5 . The phenylamides were modified by Michael’s addition of suitably chosen piperidine-containing fragments: 1-amino-N- benzylpiperidine ( a1 ), 4-benzylpiperidine ( a2 ), and N , N -dimethyl- N -[2-(1-piperazinyl)-ethyl]amine ( a3 ). The compounds exerted micromolar activity toward three cancer cell lines, A549, LoVo, and Skov-3, caus- ing apoptotic cell death. It was shown that the nature of the cyclic amine moiety at position C2 of the compounds is probably the primary determinant of anticancer activity toward tested cell lines and the acute toxicity toward brine shrimp ( Artemia salina ). The majority of compounds revealed the ability to vigorously induce mitochondrial superoxide anion generation in all treated cell lines, which together with cell cycle arrest at the S phase and activation of intrinsic caspase cascade, indicates the possibility that apoptosis was triggered due to irreparable chromosomal damage by acute oxidative stress. Two deriva- tives also exerted significant antibacterial activity with one order of magnitude higher potency than chlo- ramphenicol in most of the investigated bacterial strains. Also, the drug-like properties for all compounds were estimated by available software tools.
PB  - Elsevier
T2  - Journal of Molecular Structure
T1  - Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines
VL  - 1250
SP  - 131702
DO  - 10.1016/j.molstruc.2021.131702
ER  - 
@article{
author = "Vujatović, Tamara B. and Vitorović - Todorović, Maja D. and Cvijetić, Ilija and Vasović, Tamara and Nikolić, Milan R. and Novaković, Irena and Bjelogrlić, Snežana",
year = "2022",
abstract = "In the present work, the α, β-double bond of the aroylacrylic acid phenylamides was suitably modified to optimize the toxicity–antiproliferative activity ratio of the resulting compounds 1 –5 . The phenylamides were modified by Michael’s addition of suitably chosen piperidine-containing fragments: 1-amino-N- benzylpiperidine ( a1 ), 4-benzylpiperidine ( a2 ), and N , N -dimethyl- N -[2-(1-piperazinyl)-ethyl]amine ( a3 ). The compounds exerted micromolar activity toward three cancer cell lines, A549, LoVo, and Skov-3, caus- ing apoptotic cell death. It was shown that the nature of the cyclic amine moiety at position C2 of the compounds is probably the primary determinant of anticancer activity toward tested cell lines and the acute toxicity toward brine shrimp ( Artemia salina ). The majority of compounds revealed the ability to vigorously induce mitochondrial superoxide anion generation in all treated cell lines, which together with cell cycle arrest at the S phase and activation of intrinsic caspase cascade, indicates the possibility that apoptosis was triggered due to irreparable chromosomal damage by acute oxidative stress. Two deriva- tives also exerted significant antibacterial activity with one order of magnitude higher potency than chlo- ramphenicol in most of the investigated bacterial strains. Also, the drug-like properties for all compounds were estimated by available software tools.",
publisher = "Elsevier",
journal = "Journal of Molecular Structure",
title = "Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines",
volume = "1250",
pages = "131702",
doi = "10.1016/j.molstruc.2021.131702"
}
Vujatović, T. B., Vitorović - Todorović, M. D., Cvijetić, I., Vasović, T., Nikolić, M. R., Novaković, I.,& Bjelogrlić, S.. (2022). Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines. in Journal of Molecular Structure
Elsevier., 1250, 131702.
https://doi.org/10.1016/j.molstruc.2021.131702
Vujatović TB, Vitorović - Todorović MD, Cvijetić I, Vasović T, Nikolić MR, Novaković I, Bjelogrlić S. Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines. in Journal of Molecular Structure. 2022;1250:131702.
doi:10.1016/j.molstruc.2021.131702 .
Vujatović, Tamara B., Vitorović - Todorović, Maja D., Cvijetić, Ilija, Vasović, Tamara, Nikolić, Milan R., Novaković, Irena, Bjelogrlić, Snežana, "Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines" in Journal of Molecular Structure, 1250 (2022):131702,
https://doi.org/10.1016/j.molstruc.2021.131702 . .

Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines

Vujatović, Tamara B.; Vitorović - Todorović, Maja D.; Cvijetić, Ilija; Vasović, Tamara; Nikolić, Milan R.; Novaković, Irena; Bjelogrlić, Snežana

(Elsevier, 2022)

TY  - JOUR
AU  - Vujatović, Tamara B.
AU  - Vitorović - Todorović, Maja D.
AU  - Cvijetić, Ilija
AU  - Vasović, Tamara
AU  - Nikolić, Milan R.
AU  - Novaković, Irena
AU  - Bjelogrlić, Snežana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4857
AB  - In the present work, the α, β-double bond of the aroylacrylic acid phenylamides was suitably modified to optimize the toxicity–antiproliferative activity ratio of the resulting compounds 1 –5 . The phenylamides were modified by Michael’s addition of suitably chosen piperidine-containing fragments: 1-amino-N- benzylpiperidine ( a1 ), 4-benzylpiperidine ( a2 ), and N , N -dimethyl- N -[2-(1-piperazinyl)-ethyl]amine ( a3 ). The compounds exerted micromolar activity toward three cancer cell lines, A549, LoVo, and Skov-3, caus- ing apoptotic cell death. It was shown that the nature of the cyclic amine moiety at position C2 of the compounds is probably the primary determinant of anticancer activity toward tested cell lines and the acute toxicity toward brine shrimp ( Artemia salina ). The majority of compounds revealed the ability to vigorously induce mitochondrial superoxide anion generation in all treated cell lines, which together with cell cycle arrest at the S phase and activation of intrinsic caspase cascade, indicates the possibility that apoptosis was triggered due to irreparable chromosomal damage by acute oxidative stress. Two deriva- tives also exerted significant antibacterial activity with one order of magnitude higher potency than chlo- ramphenicol in most of the investigated bacterial strains. Also, the drug-like properties for all compounds were estimated by available software tools.
PB  - Elsevier
T2  - Journal of Molecular Structure
T1  - Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines
VL  - 1250
SP  - 131702
DO  - 10.1016/j.molstruc.2021.131702
ER  - 
@article{
author = "Vujatović, Tamara B. and Vitorović - Todorović, Maja D. and Cvijetić, Ilija and Vasović, Tamara and Nikolić, Milan R. and Novaković, Irena and Bjelogrlić, Snežana",
year = "2022",
abstract = "In the present work, the α, β-double bond of the aroylacrylic acid phenylamides was suitably modified to optimize the toxicity–antiproliferative activity ratio of the resulting compounds 1 –5 . The phenylamides were modified by Michael’s addition of suitably chosen piperidine-containing fragments: 1-amino-N- benzylpiperidine ( a1 ), 4-benzylpiperidine ( a2 ), and N , N -dimethyl- N -[2-(1-piperazinyl)-ethyl]amine ( a3 ). The compounds exerted micromolar activity toward three cancer cell lines, A549, LoVo, and Skov-3, caus- ing apoptotic cell death. It was shown that the nature of the cyclic amine moiety at position C2 of the compounds is probably the primary determinant of anticancer activity toward tested cell lines and the acute toxicity toward brine shrimp ( Artemia salina ). The majority of compounds revealed the ability to vigorously induce mitochondrial superoxide anion generation in all treated cell lines, which together with cell cycle arrest at the S phase and activation of intrinsic caspase cascade, indicates the possibility that apoptosis was triggered due to irreparable chromosomal damage by acute oxidative stress. Two deriva- tives also exerted significant antibacterial activity with one order of magnitude higher potency than chlo- ramphenicol in most of the investigated bacterial strains. Also, the drug-like properties for all compounds were estimated by available software tools.",
publisher = "Elsevier",
journal = "Journal of Molecular Structure",
title = "Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines",
volume = "1250",
pages = "131702",
doi = "10.1016/j.molstruc.2021.131702"
}
Vujatović, T. B., Vitorović - Todorović, M. D., Cvijetić, I., Vasović, T., Nikolić, M. R., Novaković, I.,& Bjelogrlić, S.. (2022). Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines. in Journal of Molecular Structure
Elsevier., 1250, 131702.
https://doi.org/10.1016/j.molstruc.2021.131702
Vujatović TB, Vitorović - Todorović MD, Cvijetić I, Vasović T, Nikolić MR, Novaković I, Bjelogrlić S. Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines. in Journal of Molecular Structure. 2022;1250:131702.
doi:10.1016/j.molstruc.2021.131702 .
Vujatović, Tamara B., Vitorović - Todorović, Maja D., Cvijetić, Ilija, Vasović, Tamara, Nikolić, Milan R., Novaković, Irena, Bjelogrlić, Snežana, "Novel derivatives of aroylacrylic acid phenylamides as inducers of apoptosis through the ROS-mediated pathway in several cancer cell lines" in Journal of Molecular Structure, 1250 (2022):131702,
https://doi.org/10.1016/j.molstruc.2021.131702 . .

Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata)

Knežević, Nataša; Jovanović, Aleksandar; Bošnjaković, Jovana; Milošević, Milena; Rančić, Milica; Marinković, Aleksandar; Gržetić, Jelena; Gamoudi, Houda

(Vojnotehnički institut, Beograd, 2022)

TY  - JOUR
AU  - Knežević, Nataša
AU  - Jovanović, Aleksandar
AU  - Bošnjaković, Jovana
AU  - Milošević, Milena
AU  - Rančić, Milica
AU  - Marinković, Aleksandar
AU  - Gržetić, Jelena
AU  - Gamoudi, Houda
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6962
AB  - U ovom radu ispitivan je potencijal korišćenja akril-funkcionalizovanog kraft lignina (AKL) u smanjenju zapaljivosti polimernih kompozita na bazi recikliranih nezasićenih poliesterskih smola (NZPS). Akrilna funkcionalizacija kraft lignina je izvedena direktnom esterifikacijom slobodnih polifenolnih grupa sa akriloil hloridom, nakon čega je AKL umešan u NZP smolu sintetizovanu od poliola dobijenih katalitičkom depolimerizacijom otpadnog poli(etilen tereftalata). AKL je homogenizovan sa NZPS pri različitim masenim udelima: 2,5, 5,0, 7,5 i 12,5 mas.%. Strukturne i dinamičko-mehaničke karakteristike akril-funkcionalizovanog kraft lignina i kompozita određene su primenom FTIR spektroskopije, dinamičkomehaničke analize (DMA) i testova jednoosnog zatezanja. Proučavan je uticaj funkcionalizacije i masenog udela AKL na zatezna i termička svojstva NZPS. Vatrootporna svojstva kompozita su ispitivana prema standardnoj UL-94V metodi, na osnovu koje je kompozit sa 12,5 tež. % akril-funkcionalizovanog lignina dostigao najvišu kategorija toplotno otpornih materijala.
AB  - This paper investigates the using potential of acryl-functionalized kraft lignin (AKL) in reducing the flammability of polymer composites based on recycled unsaturated polyester resins (UPR). Acryl functionalization of kraft lignin was performed by direct esterification of free polyphenolic groups with acryloyl chloride, after what, the AKL was blended in UPR resin synthesized from the polyols obtained by catalytic depolymerization of waste poly(ethylene terephthalate). The AKL was homogenized in UPR resin in different weight ratios: 2.5, 5.0, 7.5, and 12.5 wt.%. Structural and dynamic-mechanical characteristics of acryl-functionalized kraft lignin and composites were determined using FTIR spectroscopy, dynamicmechanical analysis (DMA), and tensile tests. The influence of functionalization and mass fraction of AKL on tensile and thermal properties of UPR resin was studied. The thermal properties of the composite were tested according to the standard UL-94 method, based on which the highest category of heat-resistant materials is a composite with 12.5 wt.% acylfunctionalized lignin.
PB  - Vojnotehnički institut, Beograd
T2  - Scientific Technical Review
T1  - Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata)
T1  - Fire-resistant composites based on acrylic-functionalized lignin and polyester resin obtained from waste poly(ethylene terephthalate)
VL  - 72
IS  - 2
SP  - 32
EP  - 37
DO  - 10.5937/str2202032K
ER  - 
@article{
author = "Knežević, Nataša and Jovanović, Aleksandar and Bošnjaković, Jovana and Milošević, Milena and Rančić, Milica and Marinković, Aleksandar and Gržetić, Jelena and Gamoudi, Houda",
year = "2022",
abstract = "U ovom radu ispitivan je potencijal korišćenja akril-funkcionalizovanog kraft lignina (AKL) u smanjenju zapaljivosti polimernih kompozita na bazi recikliranih nezasićenih poliesterskih smola (NZPS). Akrilna funkcionalizacija kraft lignina je izvedena direktnom esterifikacijom slobodnih polifenolnih grupa sa akriloil hloridom, nakon čega je AKL umešan u NZP smolu sintetizovanu od poliola dobijenih katalitičkom depolimerizacijom otpadnog poli(etilen tereftalata). AKL je homogenizovan sa NZPS pri različitim masenim udelima: 2,5, 5,0, 7,5 i 12,5 mas.%. Strukturne i dinamičko-mehaničke karakteristike akril-funkcionalizovanog kraft lignina i kompozita određene su primenom FTIR spektroskopije, dinamičkomehaničke analize (DMA) i testova jednoosnog zatezanja. Proučavan je uticaj funkcionalizacije i masenog udela AKL na zatezna i termička svojstva NZPS. Vatrootporna svojstva kompozita su ispitivana prema standardnoj UL-94V metodi, na osnovu koje je kompozit sa 12,5 tež. % akril-funkcionalizovanog lignina dostigao najvišu kategorija toplotno otpornih materijala., This paper investigates the using potential of acryl-functionalized kraft lignin (AKL) in reducing the flammability of polymer composites based on recycled unsaturated polyester resins (UPR). Acryl functionalization of kraft lignin was performed by direct esterification of free polyphenolic groups with acryloyl chloride, after what, the AKL was blended in UPR resin synthesized from the polyols obtained by catalytic depolymerization of waste poly(ethylene terephthalate). The AKL was homogenized in UPR resin in different weight ratios: 2.5, 5.0, 7.5, and 12.5 wt.%. Structural and dynamic-mechanical characteristics of acryl-functionalized kraft lignin and composites were determined using FTIR spectroscopy, dynamicmechanical analysis (DMA), and tensile tests. The influence of functionalization and mass fraction of AKL on tensile and thermal properties of UPR resin was studied. The thermal properties of the composite were tested according to the standard UL-94 method, based on which the highest category of heat-resistant materials is a composite with 12.5 wt.% acylfunctionalized lignin.",
publisher = "Vojnotehnički institut, Beograd",
journal = "Scientific Technical Review",
title = "Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata), Fire-resistant composites based on acrylic-functionalized lignin and polyester resin obtained from waste poly(ethylene terephthalate)",
volume = "72",
number = "2",
pages = "32-37",
doi = "10.5937/str2202032K"
}
Knežević, N., Jovanović, A., Bošnjaković, J., Milošević, M., Rančić, M., Marinković, A., Gržetić, J.,& Gamoudi, H.. (2022). Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata). in Scientific Technical Review
Vojnotehnički institut, Beograd., 72(2), 32-37.
https://doi.org/10.5937/str2202032K
Knežević N, Jovanović A, Bošnjaković J, Milošević M, Rančić M, Marinković A, Gržetić J, Gamoudi H. Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata). in Scientific Technical Review. 2022;72(2):32-37.
doi:10.5937/str2202032K .
Knežević, Nataša, Jovanović, Aleksandar, Bošnjaković, Jovana, Milošević, Milena, Rančić, Milica, Marinković, Aleksandar, Gržetić, Jelena, Gamoudi, Houda, "Vatrootporni kompoziti na bazi akril-funkcionalizovanog lignina i poliesterske smole dobijene od otpadnog poli(etilen tereftalata)" in Scientific Technical Review, 72, no. 2 (2022):32-37,
https://doi.org/10.5937/str2202032K . .
1
2

Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production

Čutović, Natalija; Vuksanović, Marija; Milošević, Milena; Bugarčić, Mladen; Bošnjaković, Jovana; Gržetić, Jelena; Marinković, Aleksandar

(Bor : University of Belgrade, Technical Faculty in Bor, 2022)

TY  - CONF
AU  - Čutović, Natalija
AU  - Vuksanović, Marija
AU  - Milošević, Milena
AU  - Bugarčić, Mladen
AU  - Bošnjaković, Jovana
AU  - Gržetić, Jelena
AU  - Marinković, Aleksandar
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6960
AB  - Due to the increasing use and widespread of plastics, poly (ethylene terephthalate) (PET) and poly(vinyl chloride) (PVC) are becoming one of the major threats to the environment. The aim of thispaper is obtaining plasticizers from recycled PET, and hot/cold mixing thereof with PVC to producenew materials. Plasticizer was obtained from PET using ethylene glycol (EG) in the presence ofcatalyst FASCAT 4100, followed by treatment with maleic anhydride and finally 2-ethylhexanol(2-EtHex). The obtained glycolysate and plasticizer, individually or mixtures thereof, were used forthe production of polygranulates based on waste PVC in order to obtain an expanded mass ofhomogenized PVC with glycolysate/plasticizer. The abovementioned procedures and test results forthe regranulates and products indicate that the proposed technology offers a solution to the problemof waste PET and PVC through transesterification in order to obtain plasticizer based on PET andEG, called 2-EtHex/MA/РG/PET/EG/MA/2-EtHex used in the processing of PVC waste and inregranulate. The obtained regranulates are further processed by injection molding or extrusion intocommercial products such as slippers, footwear, boots, garden hoses, mats, floor mats, etc.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - Proceedings - 29th International Conference Ecological Truth and Environmental Research - EcoTER'22, 21-24 June 2022, Sokobanja, Serbia
T1  - Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production
SP  - 452
EP  - 458
UR  - https://hdl.handle.net/21.15107/rcub_cer_6960
ER  - 
@conference{
author = "Čutović, Natalija and Vuksanović, Marija and Milošević, Milena and Bugarčić, Mladen and Bošnjaković, Jovana and Gržetić, Jelena and Marinković, Aleksandar",
year = "2022",
abstract = "Due to the increasing use and widespread of plastics, poly (ethylene terephthalate) (PET) and poly(vinyl chloride) (PVC) are becoming one of the major threats to the environment. The aim of thispaper is obtaining plasticizers from recycled PET, and hot/cold mixing thereof with PVC to producenew materials. Plasticizer was obtained from PET using ethylene glycol (EG) in the presence ofcatalyst FASCAT 4100, followed by treatment with maleic anhydride and finally 2-ethylhexanol(2-EtHex). The obtained glycolysate and plasticizer, individually or mixtures thereof, were used forthe production of polygranulates based on waste PVC in order to obtain an expanded mass ofhomogenized PVC with glycolysate/plasticizer. The abovementioned procedures and test results forthe regranulates and products indicate that the proposed technology offers a solution to the problemof waste PET and PVC through transesterification in order to obtain plasticizer based on PET andEG, called 2-EtHex/MA/РG/PET/EG/MA/2-EtHex used in the processing of PVC waste and inregranulate. The obtained regranulates are further processed by injection molding or extrusion intocommercial products such as slippers, footwear, boots, garden hoses, mats, floor mats, etc.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "Proceedings - 29th International Conference Ecological Truth and Environmental Research - EcoTER'22, 21-24 June 2022, Sokobanja, Serbia",
title = "Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production",
pages = "452-458",
url = "https://hdl.handle.net/21.15107/rcub_cer_6960"
}
Čutović, N., Vuksanović, M., Milošević, M., Bugarčić, M., Bošnjaković, J., Gržetić, J.,& Marinković, A.. (2022). Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production. in Proceedings - 29th International Conference Ecological Truth and Environmental Research - EcoTER'22, 21-24 June 2022, Sokobanja, Serbia
Bor : University of Belgrade, Technical Faculty in Bor., 452-458.
https://hdl.handle.net/21.15107/rcub_cer_6960
Čutović N, Vuksanović M, Milošević M, Bugarčić M, Bošnjaković J, Gržetić J, Marinković A. Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production. in Proceedings - 29th International Conference Ecological Truth and Environmental Research - EcoTER'22, 21-24 June 2022, Sokobanja, Serbia. 2022;:452-458.
https://hdl.handle.net/21.15107/rcub_cer_6960 .
Čutović, Natalija, Vuksanović, Marija, Milošević, Milena, Bugarčić, Mladen, Bošnjaković, Jovana, Gržetić, Jelena, Marinković, Aleksandar, "Recycled poly(ethylene terephthalate) based – plasticizers for PVC regranulates production" in Proceedings - 29th International Conference Ecological Truth and Environmental Research - EcoTER'22, 21-24 June 2022, Sokobanja, Serbia (2022):452-458,
https://hdl.handle.net/21.15107/rcub_cer_6960 .

Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal

Bugarčić, Mladen; Lopičić, Zorica; Šoštarić, Tatjana; Marinković, Aleksandar D.; Rusmirović, Jelena D.; Milošević, Dragana; Milivojević, Milan

(Elsevier, 2021)

TY  - JOUR
AU  - Bugarčić, Mladen
AU  - Lopičić, Zorica
AU  - Šoštarić, Tatjana
AU  - Marinković, Aleksandar D.
AU  - Rusmirović, Jelena D.
AU  - Milošević, Dragana
AU  - Milivojević, Milan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4798
AB  - Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.
PB  - Elsevier
T2  - Journal of Environmental Chemical Engineering
T1  - Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal
VL  - 9
IS  - 5
SP  - 106020
DO  - 10.1016/j.jece.2021.106020
ER  - 
@article{
author = "Bugarčić, Mladen and Lopičić, Zorica and Šoštarić, Tatjana and Marinković, Aleksandar D. and Rusmirović, Jelena D. and Milošević, Dragana and Milivojević, Milan",
year = "2021",
abstract = "Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.",
publisher = "Elsevier",
journal = "Journal of Environmental Chemical Engineering",
title = "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal",
volume = "9",
number = "5",
pages = "106020",
doi = "10.1016/j.jece.2021.106020"
}
Bugarčić, M., Lopičić, Z., Šoštarić, T., Marinković, A. D., Rusmirović, J. D., Milošević, D.,& Milivojević, M.. (2021). Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering
Elsevier., 9(5), 106020.
https://doi.org/10.1016/j.jece.2021.106020
Bugarčić M, Lopičić Z, Šoštarić T, Marinković AD, Rusmirović JD, Milošević D, Milivojević M. Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering. 2021;9(5):106020.
doi:10.1016/j.jece.2021.106020 .
Bugarčić, Mladen, Lopičić, Zorica, Šoštarić, Tatjana, Marinković, Aleksandar D., Rusmirović, Jelena D., Milošević, Dragana, Milivojević, Milan, "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal" in Journal of Environmental Chemical Engineering, 9, no. 5 (2021):106020,
https://doi.org/10.1016/j.jece.2021.106020 . .
10
10

Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel

Kovačina, Jovanka; Jegdić, Bore; Marunkić, Dunja; Simović, Anđela; Lazić, Dragana; Marinković, Aleksandar

(Faculty of Technology Zvornik – University of East Sarajevo, 2021)

TY  - CONF
AU  - Kovačina, Jovanka
AU  - Jegdić, Bore
AU  - Marunkić, Dunja
AU  - Simović, Anđela
AU  - Lazić, Dragana
AU  - Marinković, Aleksandar
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7066
AB  - Corrosion, although a natural process, presents a costly problem with the possibly dangerous
outcome. Mild steel, which is an alloy used in many industrial applications, manifests poor
corrosion resistance when in contact with corrosive environments and even more so in presence
of chloride ions. This is a particularly important problem in a variety of industrial applications
related to oil and gas processing such as pipeline cleaning pipeline/acid descaling, and oil well
acidizing, where the use of mineral acids (commonly hydrochloric acid) is necessary for
achieving satisfying productivity levels. The most practical method to combat the corrosion issue
is the use of corrosion inhibitors. Organic inhibitors with functional groups such as –OH, –
COOH, NH2, etc, when added in small concentrations to a corrosive solution, can lower the
corrosion rate very efficiently, especially in acidic media. Being that they are also inexpensive,
these organic inhibitors are successfully used for corrosion prevention. A great variety of
organic inhibitors has opened a door to environmentally friendly corrosion inhibition. One of
the environmentally friendly organic compounds are amino acids. They are non-toxic
biomolecules completely soluble in aqueous media and are produced with high purity and at low
cost which makes them a great candidate for a safe corrosion inhibitor. The application of amino
acids and their derivatives against corrosion of iron and its alloys has been investigated so far.
Amino acid based corrosion inhibitor was synthesized by condensing formaldehyde, glyoxal, and
β-alanine, and characterized using FTIR and NMR spectroscopic methods. Imidazolium
zwitterion has been investigated as a corrosion inhibitor on mild steel in 1 M HCl solution using
electrochemical methods: electrochemical impedance (EIS) and linear polarization resistance
(LPR). Different concentrations of inhibitor were used to find the best efficiency. This compound
gave a maximum inhibition efficiency of 74.3 % at 10.7 ppm. The adsorption of inhibitor on mild
steel surface followed the Langmuir adsorption isotherm. Furthermore, electrochemical
measurement results demonstrated that inhibitors act as mixed-type inhibitors (anodic and
cathodic).
PB  - Faculty of Technology Zvornik – University of East Sarajevo
C3  - Book of abstracts - VII International congress Engineering, environment and materials in process industry EEM2021, March 17-19, 2021 Jahorina, Republic of Serbia, Bosnia and Herzegovina
T1  - Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel
VL  - 7
SP  - 212
EP  - 212
UR  - https://hdl.handle.net/21.15107/rcub_cer_7066
ER  - 
@conference{
author = "Kovačina, Jovanka and Jegdić, Bore and Marunkić, Dunja and Simović, Anđela and Lazić, Dragana and Marinković, Aleksandar",
year = "2021",
abstract = "Corrosion, although a natural process, presents a costly problem with the possibly dangerous
outcome. Mild steel, which is an alloy used in many industrial applications, manifests poor
corrosion resistance when in contact with corrosive environments and even more so in presence
of chloride ions. This is a particularly important problem in a variety of industrial applications
related to oil and gas processing such as pipeline cleaning pipeline/acid descaling, and oil well
acidizing, where the use of mineral acids (commonly hydrochloric acid) is necessary for
achieving satisfying productivity levels. The most practical method to combat the corrosion issue
is the use of corrosion inhibitors. Organic inhibitors with functional groups such as –OH, –
COOH, NH2, etc, when added in small concentrations to a corrosive solution, can lower the
corrosion rate very efficiently, especially in acidic media. Being that they are also inexpensive,
these organic inhibitors are successfully used for corrosion prevention. A great variety of
organic inhibitors has opened a door to environmentally friendly corrosion inhibition. One of
the environmentally friendly organic compounds are amino acids. They are non-toxic
biomolecules completely soluble in aqueous media and are produced with high purity and at low
cost which makes them a great candidate for a safe corrosion inhibitor. The application of amino
acids and their derivatives against corrosion of iron and its alloys has been investigated so far.
Amino acid based corrosion inhibitor was synthesized by condensing formaldehyde, glyoxal, and
β-alanine, and characterized using FTIR and NMR spectroscopic methods. Imidazolium
zwitterion has been investigated as a corrosion inhibitor on mild steel in 1 M HCl solution using
electrochemical methods: electrochemical impedance (EIS) and linear polarization resistance
(LPR). Different concentrations of inhibitor were used to find the best efficiency. This compound
gave a maximum inhibition efficiency of 74.3 % at 10.7 ppm. The adsorption of inhibitor on mild
steel surface followed the Langmuir adsorption isotherm. Furthermore, electrochemical
measurement results demonstrated that inhibitors act as mixed-type inhibitors (anodic and
cathodic).",
publisher = "Faculty of Technology Zvornik – University of East Sarajevo",
journal = "Book of abstracts - VII International congress Engineering, environment and materials in process industry EEM2021, March 17-19, 2021 Jahorina, Republic of Serbia, Bosnia and Herzegovina",
title = "Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel",
volume = "7",
pages = "212-212",
url = "https://hdl.handle.net/21.15107/rcub_cer_7066"
}
Kovačina, J., Jegdić, B., Marunkić, D., Simović, A., Lazić, D.,& Marinković, A.. (2021). Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel. in Book of abstracts - VII International congress Engineering, environment and materials in process industry EEM2021, March 17-19, 2021 Jahorina, Republic of Serbia, Bosnia and Herzegovina
Faculty of Technology Zvornik – University of East Sarajevo., 7, 212-212.
https://hdl.handle.net/21.15107/rcub_cer_7066
Kovačina J, Jegdić B, Marunkić D, Simović A, Lazić D, Marinković A. Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel. in Book of abstracts - VII International congress Engineering, environment and materials in process industry EEM2021, March 17-19, 2021 Jahorina, Republic of Serbia, Bosnia and Herzegovina. 2021;7:212-212.
https://hdl.handle.net/21.15107/rcub_cer_7066 .
Kovačina, Jovanka, Jegdić, Bore, Marunkić, Dunja, Simović, Anđela, Lazić, Dragana, Marinković, Aleksandar, "Amino acid imidayolium zwitterion as green corrosion inhibitor for mild steel" in Book of abstracts - VII International congress Engineering, environment and materials in process industry EEM2021, March 17-19, 2021 Jahorina, Republic of Serbia, Bosnia and Herzegovina, 7 (2021):212-212,
https://hdl.handle.net/21.15107/rcub_cer_7066 .

Fatigue fracture analysis of helicopter landing gear cross tube

Raković, Dragan; Simonović, Aleksandar; Grbović, Aleksandar; Radović, Ljubica; Vorkapić, Miloš; Krstić, Branimir

(Elsevier, 2021)

TY  - JOUR
AU  - Raković, Dragan
AU  - Simonović, Aleksandar
AU  - Grbović, Aleksandar
AU  - Radović, Ljubica
AU  - Vorkapić, Miloš
AU  - Krstić, Branimir
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4783
AB  - This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.
PB  - Elsevier
T2  - Engineering Failure Analysis
T1  - Fatigue fracture analysis of helicopter landing gear cross tube
VL  - 129
SP  - 105672
DO  - 10.1016/j.engfailanal.2021.105672
ER  - 
@article{
author = "Raković, Dragan and Simonović, Aleksandar and Grbović, Aleksandar and Radović, Ljubica and Vorkapić, Miloš and Krstić, Branimir",
year = "2021",
abstract = "This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.",
publisher = "Elsevier",
journal = "Engineering Failure Analysis",
title = "Fatigue fracture analysis of helicopter landing gear cross tube",
volume = "129",
pages = "105672",
doi = "10.1016/j.engfailanal.2021.105672"
}
Raković, D., Simonović, A., Grbović, A., Radović, L., Vorkapić, M.,& Krstić, B.. (2021). Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis
Elsevier., 129, 105672.
https://doi.org/10.1016/j.engfailanal.2021.105672
Raković D, Simonović A, Grbović A, Radović L, Vorkapić M, Krstić B. Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis. 2021;129:105672.
doi:10.1016/j.engfailanal.2021.105672 .
Raković, Dragan, Simonović, Aleksandar, Grbović, Aleksandar, Radović, Ljubica, Vorkapić, Miloš, Krstić, Branimir, "Fatigue fracture analysis of helicopter landing gear cross tube" in Engineering Failure Analysis, 129 (2021):105672,
https://doi.org/10.1016/j.engfailanal.2021.105672 . .
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Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale

Marinković, Aleksandar; Milosavljević, Milutin; Kovačević, Tihomir; Kovačina, Jovanka; Milošević, Milena; Jovanović, Aleksandar; Slobodan, Petrović

(2020)

TY  - CONF
AU  - Marinković, Aleksandar
AU  - Milosavljević, Milutin
AU  - Kovačević, Tihomir
AU  - Kovačina, Jovanka
AU  - Milošević, Milena
AU  - Jovanović, Aleksandar
AU  - Slobodan, Petrović
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6867
AB  - Razvijena je inovativna tehnologija za proizvodnju gelnih premaza i materijala koji smanjuju zapaljivost
na bazi nezasićenih poliestarskih smola (eng. Unsaturated polyester resins-UPR). Ovi materijali su
sintetisani iz sirovina dobijenih iz otpadnog poli(etilen) tereftalata (PET) i bio-obnovljivih izvora. Ovaj
proces čine tri faze: (I) sinteza hidroksilnih, karboksilnih i vinilnih termalnih monomera kao i anhidrida
maleinske kiseline na bio-osnovi iz 5-hidroksimetilfurfurala (HMF) i levulinske kiseline; proizvodi sa
termalnim hidroksilnim grupama, zasnovani su na otpadnom PET-u i karboksil, hidroksil i vinil termalnom
fosfatnom estru kraft lignina; (II) sinteza bio-UPR smola koristeći proizvode iz prve faze i vinil derivate iz
HMF-a i kraft lignina kao vezujućeg agensa za UPR smole; (III) homogenizacija UPR smola sa aditivima
(dispergatori, pigmenti, punioci i aditivi sintetisani u prvoj fazi) da bi dobili gelni premaz i sjedinili ga sa
usporivačem plamena (derivati fosfatnog estra lignina) i proizveli protiv požarni materijal. Predstavljene
tehnologije poštuju ekološke standarde kao i principe zelene i cirkularne ekonomije. Dobijeni proizvodi
mogu se primeniti u raznim industrijama (građevinarstvo, rudarstvo, prerada polimera itd.)
T1  - Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale
UR  - https://hdl.handle.net/21.15107/rcub_cer_6867
ER  - 
@conference{
author = "Marinković, Aleksandar and Milosavljević, Milutin and Kovačević, Tihomir and Kovačina, Jovanka and Milošević, Milena and Jovanović, Aleksandar and Slobodan, Petrović",
year = "2020",
abstract = "Razvijena je inovativna tehnologija za proizvodnju gelnih premaza i materijala koji smanjuju zapaljivost
na bazi nezasićenih poliestarskih smola (eng. Unsaturated polyester resins-UPR). Ovi materijali su
sintetisani iz sirovina dobijenih iz otpadnog poli(etilen) tereftalata (PET) i bio-obnovljivih izvora. Ovaj
proces čine tri faze: (I) sinteza hidroksilnih, karboksilnih i vinilnih termalnih monomera kao i anhidrida
maleinske kiseline na bio-osnovi iz 5-hidroksimetilfurfurala (HMF) i levulinske kiseline; proizvodi sa
termalnim hidroksilnim grupama, zasnovani su na otpadnom PET-u i karboksil, hidroksil i vinil termalnom
fosfatnom estru kraft lignina; (II) sinteza bio-UPR smola koristeći proizvode iz prve faze i vinil derivate iz
HMF-a i kraft lignina kao vezujućeg agensa za UPR smole; (III) homogenizacija UPR smola sa aditivima
(dispergatori, pigmenti, punioci i aditivi sintetisani u prvoj fazi) da bi dobili gelni premaz i sjedinili ga sa
usporivačem plamena (derivati fosfatnog estra lignina) i proizveli protiv požarni materijal. Predstavljene
tehnologije poštuju ekološke standarde kao i principe zelene i cirkularne ekonomije. Dobijeni proizvodi
mogu se primeniti u raznim industrijama (građevinarstvo, rudarstvo, prerada polimera itd.)",
title = "Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale",
url = "https://hdl.handle.net/21.15107/rcub_cer_6867"
}
Marinković, A., Milosavljević, M., Kovačević, T., Kovačina, J., Milošević, M., Jovanović, A.,& Slobodan, P.. (2020). Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale. .
https://hdl.handle.net/21.15107/rcub_cer_6867
Marinković A, Milosavljević M, Kovačević T, Kovačina J, Milošević M, Jovanović A, Slobodan P. Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale. 2020;.
https://hdl.handle.net/21.15107/rcub_cer_6867 .
Marinković, Aleksandar, Milosavljević, Milutin, Kovačević, Tihomir, Kovačina, Jovanka, Milošević, Milena, Jovanović, Aleksandar, Slobodan, Petrović, "Ekološki prihvatljiva tehnologija za proizvodnju gelnih premaza i protivpožarnih materijala koristeći bio-obnovljive i otpadne materijale" (2020),
https://hdl.handle.net/21.15107/rcub_cer_6867 .

Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane

Perendija, Jovana; Veličković, Zlate S.; Cvijetić, Ilija; Rusmirović, Jelena; Ugrinović, Vukašin; Marinković, Aleksandar D.; Onjia, Antonije E.

(Springer, 2020)

TY  - JOUR
AU  - Perendija, Jovana
AU  - Veličković, Zlate S.
AU  - Cvijetić, Ilija
AU  - Rusmirović, Jelena
AU  - Ugrinović, Vukašin
AU  - Marinković, Aleksandar D.
AU  - Onjia, Antonije E.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3633
AB  - Abstract: An optimized method is presented to make magnetite (MG) modified cellulose membrane (Cell-MG) from 3-aminopropyltriethoxysilane and diethylenetriaminepentaacetic acid dianhydride functionalized waste cell fibers; (Cell-NH2 and Cell-DTPA), and amino-modified diatomite. Functionalized Cell-NH2, Cell-DTPA fibers, and diatomite were structurally and morphologically characterized using FT-IR, Raman, and FE-SEM analysis. Amino and carboxyl group content was determined via standard volumetric methods. Response surface method was applied to rationalize the number of experiments related to Cell-MG synthesis and heavy metal ions column adsorption experiments. The effects of pH, contact time, temperature, and initial concentration of pollutants on adsorption and kinetics were studied in a batch, while initial concentration and flow rate were studied in a flow system. The calculated capacities of 88.2, 100.7, 95.8 and 78.2 mg g−1 for Ni2+, Pb2+, Cr(VI) and As(V) ions, respectively, were obtained from Langmuir model fitting. Intra-particle diffusion as a rate-limiting step was evaluated from pseudo-second-order and Weber–Morris model fitting. Thermodynamic parameters indicated spontaneous and low endothermic processes. The results from reusability study, wastewater purification and fixed-bed column study proved the high applicability of Cell-MG. Additionally, high removal capacity of four dyes together with density functional theory and molecular interaction fields, help in the establishment of relation between the adsorption performances and contribution of non-specific and specific interactions at adsorbate/adsorbent interface.
PB  - Springer
T2  - Cellulose
T1  - Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane
VL  - 27
SP  - 8215
EP  - 8235
DO  - 10.1007/s10570-020-03352-x
ER  - 
@article{
author = "Perendija, Jovana and Veličković, Zlate S. and Cvijetić, Ilija and Rusmirović, Jelena and Ugrinović, Vukašin and Marinković, Aleksandar D. and Onjia, Antonije E.",
year = "2020",
abstract = "Abstract: An optimized method is presented to make magnetite (MG) modified cellulose membrane (Cell-MG) from 3-aminopropyltriethoxysilane and diethylenetriaminepentaacetic acid dianhydride functionalized waste cell fibers; (Cell-NH2 and Cell-DTPA), and amino-modified diatomite. Functionalized Cell-NH2, Cell-DTPA fibers, and diatomite were structurally and morphologically characterized using FT-IR, Raman, and FE-SEM analysis. Amino and carboxyl group content was determined via standard volumetric methods. Response surface method was applied to rationalize the number of experiments related to Cell-MG synthesis and heavy metal ions column adsorption experiments. The effects of pH, contact time, temperature, and initial concentration of pollutants on adsorption and kinetics were studied in a batch, while initial concentration and flow rate were studied in a flow system. The calculated capacities of 88.2, 100.7, 95.8 and 78.2 mg g−1 for Ni2+, Pb2+, Cr(VI) and As(V) ions, respectively, were obtained from Langmuir model fitting. Intra-particle diffusion as a rate-limiting step was evaluated from pseudo-second-order and Weber–Morris model fitting. Thermodynamic parameters indicated spontaneous and low endothermic processes. The results from reusability study, wastewater purification and fixed-bed column study proved the high applicability of Cell-MG. Additionally, high removal capacity of four dyes together with density functional theory and molecular interaction fields, help in the establishment of relation between the adsorption performances and contribution of non-specific and specific interactions at adsorbate/adsorbent interface.",
publisher = "Springer",
journal = "Cellulose",
title = "Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane",
volume = "27",
pages = "8215-8235",
doi = "10.1007/s10570-020-03352-x"
}
Perendija, J., Veličković, Z. S., Cvijetić, I., Rusmirović, J., Ugrinović, V., Marinković, A. D.,& Onjia, A. E.. (2020). Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane. in Cellulose
Springer., 27, 8215-8235.
https://doi.org/10.1007/s10570-020-03352-x
Perendija J, Veličković ZS, Cvijetić I, Rusmirović J, Ugrinović V, Marinković AD, Onjia AE. Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane. in Cellulose. 2020;27:8215-8235.
doi:10.1007/s10570-020-03352-x .
Perendija, Jovana, Veličković, Zlate S., Cvijetić, Ilija, Rusmirović, Jelena, Ugrinović, Vukašin, Marinković, Aleksandar D., Onjia, Antonije E., "Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane" in Cellulose, 27 (2020):8215-8235,
https://doi.org/10.1007/s10570-020-03352-x . .
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