TY  - CONF
AU  - Marković, Smilja
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana
AU  - Simić, Danica
AU  - Samolov, Aleksandra
AU  - Stojković Simatović, Ivana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11785
AB  - Radar-absorbent materials, used in stealth technology for defense aircrafts, vehicles, satellites, etc. from radar detection, are commonly based on graphite or semiconductive particles embedded in a polymer matrix. In this study, we employed Co2+ ion-substitution to improve Vis-NIR reflectivity of hydroxyapatite (Ca10(PO4)6(OH)2, HAP) powder. HAP:Co with nominally 5 at.% of Co was prepared with hydrothermal processing of a precipitate. Synthesized powder was characterized by XRD, Raman and ATR-FTIR spectroscopy, FE-SEM and TEM. Thermal stability of HAP:Co powder was examined by simultaneous TG-DTA analyzer. To modify its optical properties and obtain powders with a varietty of color tone, the HAP:Co powder was calcined at 800, 1000, and 1100 °C, in an air atmosphere, for 1 hour. Afterward, the calcined particles were used to prepare composites with poly(vinyl butyral), (PVB); the concentration range was 1 wt.% of the HAP:Co in PVB. The composite coatings, in the form of thin films on glass, were prepared by the solvent-casting technique, using ethanol as a fast evaporating solvent. Firstly, the HAP:Co particles were dispersed in ethanol, then PVB was added (Mowital B30H) and dissolved. To evaporate the solvent before spectrophotometric measurements, the coatings on glass were dried at room temperature for 72 hours. To comprehend optical properties of the coatings, diffuse reflection, transmission, and color coordinates were determined. We found that calcined HAP:Co particles have potential to be used in the formulation of coatings for camouflage protection.
PB  - Belgrade : Military Technical Institute
C3  - OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
T1  - HAp:Co as tunable VIS-NIR reflective pigment
SP  - 475
EP  - 480
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11785
ER  - 

@conference{
author = "Marković, Smilja and Stojanović, Zoran S. and Veselinović, Ljiljana and Simić, Danica and Samolov, Aleksandra and Stojković Simatović, Ivana",
year = "2020",
abstract = "Radar-absorbent materials, used in stealth technology for defense aircrafts, vehicles, satellites, etc. from radar detection, are commonly based on graphite or semiconductive particles embedded in a polymer matrix. In this study, we employed Co2+ ion-substitution to improve Vis-NIR reflectivity of hydroxyapatite (Ca10(PO4)6(OH)2, HAP) powder. HAP:Co with nominally 5 at.% of Co was prepared with hydrothermal processing of a precipitate. Synthesized powder was characterized by XRD, Raman and ATR-FTIR spectroscopy, FE-SEM and TEM. Thermal stability of HAP:Co powder was examined by simultaneous TG-DTA analyzer. To modify its optical properties and obtain powders with a varietty of color tone, the HAP:Co powder was calcined at 800, 1000, and 1100 °C, in an air atmosphere, for 1 hour. Afterward, the calcined particles were used to prepare composites with poly(vinyl butyral), (PVB); the concentration range was 1 wt.% of the HAP:Co in PVB. The composite coatings, in the form of thin films on glass, were prepared by the solvent-casting technique, using ethanol as a fast evaporating solvent. Firstly, the HAP:Co particles were dispersed in ethanol, then PVB was added (Mowital B30H) and dissolved. To evaporate the solvent before spectrophotometric measurements, the coatings on glass were dried at room temperature for 72 hours. To comprehend optical properties of the coatings, diffuse reflection, transmission, and color coordinates were determined. We found that calcined HAP:Co particles have potential to be used in the formulation of coatings for camouflage protection.",
publisher = "Belgrade : Military Technical Institute",
journal = "OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade",
title = "HAp:Co as tunable VIS-NIR reflective pigment",
pages = "475-480",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11785"
}

Marković, S., Stojanović, Z. S., Veselinović, L., Simić, D., Samolov, A.,& Stojković Simatović, I.. (2020). HAp:Co as tunable VIS-NIR reflective pigment. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
Belgrade : Military Technical Institute., 475-480.
https://hdl.handle.net/21.15107/rcub_vinar_11785

Marković S, Stojanović ZS, Veselinović L, Simić D, Samolov A, Stojković Simatović I. HAp:Co as tunable VIS-NIR reflective pigment. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade. 2020;:475-480.
https://hdl.handle.net/21.15107/rcub_vinar_11785 .

Marković, Smilja, Stojanović, Zoran S., Veselinović, Ljiljana, Simić, Danica, Samolov, Aleksandra, Stojković Simatović, Ivana, "HAp:Co as tunable VIS-NIR reflective pigment" in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade (2020):475-480,
https://hdl.handle.net/21.15107/rcub_vinar_11785 .

TY  - CONF
AU  - Simić, Danica
AU  - Marjanović, Milica
AU  - Samolov, Aleksandra
AU  - Lazić, Dragana
AU  - Rezgui, Narimane
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11795
AB  - Nowadays, application of nanotechnologies is an emerging trend in defense technologies, as well as in all other fields. In previous years there has been an extensive research ongoing on the possibilities of application of nanotechnologies in order to enhance the armaments and military equipment. Among the application of nanofuels and nanomodifiers in energetic materials, active nanocatalysts of self-decontamination in CBRN protection, nanoreinforcements of composites and coatings, one group of nanomaterials stood out for its possible multidisciplinary applications and efficiency. Tungsten disulfide in the form of inorganic fullerene-like nanoparticles and inorganic nanotubes (IF-WS2 and INT-WS2), was previously known as a solid lubricant, extensively used by NASA, military, aerospace and automotive industry. WS2 comes in different shapes and forms and all of them are known for their good mechanical properties, but in these two nano-forms it has extraordinary impact, pressure and heat resistance, dry lubrication performance, and special conductive properties. In this paper a survey is presented of recent research of tungsten disulfide nanostructures potential use as in defense technologies, from dry lubrication, over reinforcement of polymers for binding systems, of composites for ballistic protection and aircraft construction, to camouflage protection coatings.
PB  - Belgrade : Military Technical Institute
C3  - OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
T1  - Potential applications of tungsten disulfide nanostructures in defense technologies
SP  - 322
EP  - 328
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11795
ER  - 

@conference{
author = "Simić, Danica and Marjanović, Milica and Samolov, Aleksandra and Lazić, Dragana and Rezgui, Narimane",
year = "2020",
abstract = "Nowadays, application of nanotechnologies is an emerging trend in defense technologies, as well as in all other fields. In previous years there has been an extensive research ongoing on the possibilities of application of nanotechnologies in order to enhance the armaments and military equipment. Among the application of nanofuels and nanomodifiers in energetic materials, active nanocatalysts of self-decontamination in CBRN protection, nanoreinforcements of composites and coatings, one group of nanomaterials stood out for its possible multidisciplinary applications and efficiency. Tungsten disulfide in the form of inorganic fullerene-like nanoparticles and inorganic nanotubes (IF-WS2 and INT-WS2), was previously known as a solid lubricant, extensively used by NASA, military, aerospace and automotive industry. WS2 comes in different shapes and forms and all of them are known for their good mechanical properties, but in these two nano-forms it has extraordinary impact, pressure and heat resistance, dry lubrication performance, and special conductive properties. In this paper a survey is presented of recent research of tungsten disulfide nanostructures potential use as in defense technologies, from dry lubrication, over reinforcement of polymers for binding systems, of composites for ballistic protection and aircraft construction, to camouflage protection coatings.",
publisher = "Belgrade : Military Technical Institute",
journal = "OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade",
title = "Potential applications of tungsten disulfide nanostructures in defense technologies",
pages = "322-328",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11795"
}

Simić, D., Marjanović, M., Samolov, A., Lazić, D.,& Rezgui, N.. (2020). Potential applications of tungsten disulfide nanostructures in defense technologies. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
Belgrade : Military Technical Institute., 322-328.
https://hdl.handle.net/21.15107/rcub_vinar_11795

Simić D, Marjanović M, Samolov A, Lazić D, Rezgui N. Potential applications of tungsten disulfide nanostructures in defense technologies. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade. 2020;:322-328.
https://hdl.handle.net/21.15107/rcub_vinar_11795 .

Simić, Danica, Marjanović, Milica, Samolov, Aleksandra, Lazić, Dragana, Rezgui, Narimane, "Potential applications of tungsten disulfide nanostructures in defense technologies" in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade (2020):322-328,
https://hdl.handle.net/21.15107/rcub_vinar_11795 .

TY  - CONF
AU  - Simić, Danica
AU  - Samolov, Aleksandra
AU  - Fidanovski, Dragana
AU  - Totovski, Ljubica
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11781
AB  - PVB is a flexible but tough polymer of excellent optical clarity and transparence, and due to that it has a wide application in different coatings and in laminated glass industry. Epoxy resin has good mechanical resistance and it is also applied in coatings, but also as a binder in composites. In this research a possibility was examined to improve thermal resistance and spectrophotometric properties of thin film coatings of PVB and epoxy modified with addition of 10 wt.% of PVB, by addition of small concentrations of tungsten disulfide nanotubes and nanoparticles. Coatings were applied on glass plates by solvent-casting technique: PVB and epoxy/PVB were dissolved in ethanol in which previously nanostructures were deagglomerated and dispersed using ultrasonic probe. Inorganic fullerene-like nanoparticles of tungsten disulphide (IF-WS2) were added in concentration 1 wt.% and nanotubes (INT-WS2) in concentration 0.3 wt.%. Dispersion of tungsten disulfide nanostructures was observed using scanning electron microscope. Thermal resistance was examined by differential scanning calorimetry. The following spectrophotometric properties were examined: diffuse reflection and transmition, using spectrophotometer Shimadzu UV 3600 with an integrating sphere and UV Probe programme package, and specular gloss, using glossmeter Elcometer 480, under angles 20°, 60° and 85°. Observed results have indicated that new composite coatings with nanostructures have enhanced thermal resistance and camouflage properties for potential military applications.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 17th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts; December 5-7, Belgrade
T1  - Spectrophotometric and thermal properties of poly(vinyl butyral) and epoxy protective coatings with nanostructures of WS2
SP  - 74
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11781
ER  - 

@conference{
author = "Simić, Danica and Samolov, Aleksandra and Fidanovski, Dragana and Totovski, Ljubica",
year = "2018",
abstract = "PVB is a flexible but tough polymer of excellent optical clarity and transparence, and due to that it has a wide application in different coatings and in laminated glass industry. Epoxy resin has good mechanical resistance and it is also applied in coatings, but also as a binder in composites. In this research a possibility was examined to improve thermal resistance and spectrophotometric properties of thin film coatings of PVB and epoxy modified with addition of 10 wt.% of PVB, by addition of small concentrations of tungsten disulfide nanotubes and nanoparticles. Coatings were applied on glass plates by solvent-casting technique: PVB and epoxy/PVB were dissolved in ethanol in which previously nanostructures were deagglomerated and dispersed using ultrasonic probe. Inorganic fullerene-like nanoparticles of tungsten disulphide (IF-WS2) were added in concentration 1 wt.% and nanotubes (INT-WS2) in concentration 0.3 wt.%. Dispersion of tungsten disulfide nanostructures was observed using scanning electron microscope. Thermal resistance was examined by differential scanning calorimetry. The following spectrophotometric properties were examined: diffuse reflection and transmition, using spectrophotometer Shimadzu UV 3600 with an integrating sphere and UV Probe programme package, and specular gloss, using glossmeter Elcometer 480, under angles 20°, 60° and 85°. Observed results have indicated that new composite coatings with nanostructures have enhanced thermal resistance and camouflage properties for potential military applications.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "17th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts; December 5-7, Belgrade",
title = "Spectrophotometric and thermal properties of poly(vinyl butyral) and epoxy protective coatings with nanostructures of WS2",
pages = "74-74",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11781"
}

Simić, D., Samolov, A., Fidanovski, D.,& Totovski, L.. (2018). Spectrophotometric and thermal properties of poly(vinyl butyral) and epoxy protective coatings with nanostructures of WS2. in 17th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts; December 5-7, Belgrade
Belgrade : Institute of Technical Sciences of SASA., 74-74.
https://hdl.handle.net/21.15107/rcub_vinar_11781

Simić D, Samolov A, Fidanovski D, Totovski L. Spectrophotometric and thermal properties of poly(vinyl butyral) and epoxy protective coatings with nanostructures of WS2. in 17th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts; December 5-7, Belgrade. 2018;:74-74.
https://hdl.handle.net/21.15107/rcub_vinar_11781 .

Simić, Danica, Samolov, Aleksandra, Fidanovski, Dragana, Totovski, Ljubica, "Spectrophotometric and thermal properties of poly(vinyl butyral) and epoxy protective coatings with nanostructures of WS2" in 17th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts; December 5-7, Belgrade (2018):74-74,
https://hdl.handle.net/21.15107/rcub_vinar_11781 .