TY  - JOUR
AU  - Nikolić, Irena
AU  - Janković-Častvan, Ivona
AU  - Krivokapić, Jasmina
AU  - Đurović, Dijana
AU  - Radmilović, Vuk
AU  - Radmilović, Velimir R.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2570
AB  - In terms of quality, bauxite ore can be classified as high- or low-grade ore. High-grade bauxite ores are used for alumina extraction using the Bayer process, while low-grade bauxite ores have a limited application. In this paper we investigate the possibility of evaluating low-grade bauxite ores with the geopolymerization process. The influence of the synthesis parameters, i.e., alkali and silicate dosages and alkali cations (Na+ and K+) on the compressive strength of bauxite-based geopolymers is evaluated. The results show that an increase in the alkali dosage has a beneficial effect on the strength of bauxite-based geopolymers, while the strengthening of geopolymers by increasing the silicate dosage is limited by the viscosity of the geopolymer paste. Moreover, Na-geopolymers reach higher values of the compressive strength than K-geopolymers.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Geopolymerization of low-grade bauxite
EP  - 44
IS  - 1
SP  - 39
VL  - 48
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2570
ER  - 

@article{
author = "Nikolić, Irena and Janković-Častvan, Ivona and Krivokapić, Jasmina and Đurović, Dijana and Radmilović, Vuk and Radmilović, Velimir R.",
year = "2014",
abstract = "In terms of quality, bauxite ore can be classified as high- or low-grade ore. High-grade bauxite ores are used for alumina extraction using the Bayer process, while low-grade bauxite ores have a limited application. In this paper we investigate the possibility of evaluating low-grade bauxite ores with the geopolymerization process. The influence of the synthesis parameters, i.e., alkali and silicate dosages and alkali cations (Na+ and K+) on the compressive strength of bauxite-based geopolymers is evaluated. The results show that an increase in the alkali dosage has a beneficial effect on the strength of bauxite-based geopolymers, while the strengthening of geopolymers by increasing the silicate dosage is limited by the viscosity of the geopolymer paste. Moreover, Na-geopolymers reach higher values of the compressive strength than K-geopolymers.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Geopolymerization of low-grade bauxite",
pages = "44-39",
number = "1",
volume = "48",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2570"
}

Nikolić, I., Janković-Častvan, I., Krivokapić, J., Đurović, D., Radmilović, V.,& Radmilović, V. R.. (2014). Geopolymerization of low-grade bauxite. in Materiali in Tehnologije
Institute of Metals and Technology., 48(1), 39-44.
https://hdl.handle.net/21.15107/rcub_technorep_2570

Nikolić I, Janković-Častvan I, Krivokapić J, Đurović D, Radmilović V, Radmilović VR. Geopolymerization of low-grade bauxite. in Materiali in Tehnologije. 2014;48(1):39-44.
https://hdl.handle.net/21.15107/rcub_technorep_2570 .

Nikolić, Irena, Janković-Častvan, Ivona, Krivokapić, Jasmina, Đurović, Dijana, Radmilović, Vuk, Radmilović, Velimir R., "Geopolymerization of low-grade bauxite" in Materiali in Tehnologije, 48, no. 1 (2014):39-44,
https://hdl.handle.net/21.15107/rcub_technorep_2570 .

TY  - JOUR
AU  - Nikolić, Irena
AU  - Karanović, Ljiljana
AU  - Janković-Častvan, Ivona
AU  - Radmilović, Vuk
AU  - Mentus, Slavko
AU  - Radmilović, Velimir R.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2661
AB  - This paper presents a study on thermal stability of alkali activated slag (AAS) prepared from electric arc furnace slag (EAFS) using a mixture of alkaline sodium hydroxide and sodium silicate solutions. The samples were investigated by means of XRD, SEM, TG/DTA and porosity analysis. Compressive strengths of MS samples before and after exposure to elevated temperatures ranging from 600 degrees C to 1000 degrees C were determined. The significant microstructural modifications highlighted by changes in porosity due to the sintering process are responsible for the strengthening of MS sample after heating at 600,800 and 1000 degrees C. Moreover, in MS sample after heating to and above 600 degrees C wustite transforms to spinel.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - Improved compressive strength of alkali activated slag upon heating
EP  - 254
SP  - 251
VL  - 133
DO  - 10.1016/j.matlet.2014.07.021
ER  - 

@article{
author = "Nikolić, Irena and Karanović, Ljiljana and Janković-Častvan, Ivona and Radmilović, Vuk and Mentus, Slavko and Radmilović, Velimir R.",
year = "2014",
abstract = "This paper presents a study on thermal stability of alkali activated slag (AAS) prepared from electric arc furnace slag (EAFS) using a mixture of alkaline sodium hydroxide and sodium silicate solutions. The samples were investigated by means of XRD, SEM, TG/DTA and porosity analysis. Compressive strengths of MS samples before and after exposure to elevated temperatures ranging from 600 degrees C to 1000 degrees C were determined. The significant microstructural modifications highlighted by changes in porosity due to the sintering process are responsible for the strengthening of MS sample after heating at 600,800 and 1000 degrees C. Moreover, in MS sample after heating to and above 600 degrees C wustite transforms to spinel.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "Improved compressive strength of alkali activated slag upon heating",
pages = "254-251",
volume = "133",
doi = "10.1016/j.matlet.2014.07.021"
}

Nikolić, I., Karanović, L., Janković-Častvan, I., Radmilović, V., Mentus, S.,& Radmilović, V. R.. (2014). Improved compressive strength of alkali activated slag upon heating. in Materials Letters
Elsevier Science Bv, Amsterdam., 133, 251-254.
https://doi.org/10.1016/j.matlet.2014.07.021

Nikolić I, Karanović L, Janković-Častvan I, Radmilović V, Mentus S, Radmilović VR. Improved compressive strength of alkali activated slag upon heating. in Materials Letters. 2014;133:251-254.
doi:10.1016/j.matlet.2014.07.021 .

Nikolić, Irena, Karanović, Ljiljana, Janković-Častvan, Ivona, Radmilović, Vuk, Mentus, Slavko, Radmilović, Velimir R., "Improved compressive strength of alkali activated slag upon heating" in Materials Letters, 133 (2014):251-254,
https://doi.org/10.1016/j.matlet.2014.07.021 . .

TY  - JOUR
AU  - Đokić, Veljko
AU  - Marinković, Aleksandar
AU  - Ersen, Ovidiu
AU  - Uskoković, Petar
AU  - Petrović, Rada
AU  - Radmilović, Velimir R.
AU  - Janaćković, Đorđe
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2759
AB  - Nanostructural TiO2/modified multi-wall carbon nanotubes photocatalysts were prepared by hydrolysis of Ti(iso-OC3H7)(4) providing chemical bonding of anatase TiO2 nanoparticles onto oxidized- or amino-functionalized multi-wall carbon nanotubes (MWCNT). The processes of functionalization of the MWCNT and the deposition of TiO2 influence the photocatalytic activity of the synthesized nanocomposites. The phase composition, crystallite size, and the structural and surface properties of the obtained TiO2/modified-MWCNT nanocomposite were analyzed from XRD, FEG-SEM, TEM/HRTEM and FTIR data, as well low temperature N-2 adsorption. In the photocatalytic study, the TiO2/oxidized-MWCNT catalyst showed the highest and the TiO2/amino functionalized-MWCNT catalysts somewhat lower degradation rates, indicating that the enhancement of photocatalysis was supported by the more effective electron transfer properties of the oxygen- than amino-containing functional groups, which support the efficient charge transportation and separation of the photogenerated electron-hole pairs.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - The dependence of the photocatalytic activity of TiO2/carbon nanotubes nanocomposites on the modification of the carbon nanotubes
EP  - 4018
IS  - 3
SP  - 4009
VL  - 40
DO  - 10.1016/j.ceramint.2013.08.052
ER  - 

@article{
author = "Đokić, Veljko and Marinković, Aleksandar and Ersen, Ovidiu and Uskoković, Petar and Petrović, Rada and Radmilović, Velimir R. and Janaćković, Đorđe",
year = "2014",
abstract = "Nanostructural TiO2/modified multi-wall carbon nanotubes photocatalysts were prepared by hydrolysis of Ti(iso-OC3H7)(4) providing chemical bonding of anatase TiO2 nanoparticles onto oxidized- or amino-functionalized multi-wall carbon nanotubes (MWCNT). The processes of functionalization of the MWCNT and the deposition of TiO2 influence the photocatalytic activity of the synthesized nanocomposites. The phase composition, crystallite size, and the structural and surface properties of the obtained TiO2/modified-MWCNT nanocomposite were analyzed from XRD, FEG-SEM, TEM/HRTEM and FTIR data, as well low temperature N-2 adsorption. In the photocatalytic study, the TiO2/oxidized-MWCNT catalyst showed the highest and the TiO2/amino functionalized-MWCNT catalysts somewhat lower degradation rates, indicating that the enhancement of photocatalysis was supported by the more effective electron transfer properties of the oxygen- than amino-containing functional groups, which support the efficient charge transportation and separation of the photogenerated electron-hole pairs.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "The dependence of the photocatalytic activity of TiO2/carbon nanotubes nanocomposites on the modification of the carbon nanotubes",
pages = "4018-4009",
number = "3",
volume = "40",
doi = "10.1016/j.ceramint.2013.08.052"
}

Đokić, V., Marinković, A., Ersen, O., Uskoković, P., Petrović, R., Radmilović, V. R.,& Janaćković, Đ.. (2014). The dependence of the photocatalytic activity of TiO2/carbon nanotubes nanocomposites on the modification of the carbon nanotubes. in Ceramics International
Elsevier Sci Ltd, Oxford., 40(3), 4009-4018.
https://doi.org/10.1016/j.ceramint.2013.08.052

Đokić V, Marinković A, Ersen O, Uskoković P, Petrović R, Radmilović VR, Janaćković Đ. The dependence of the photocatalytic activity of TiO2/carbon nanotubes nanocomposites on the modification of the carbon nanotubes. in Ceramics International. 2014;40(3):4009-4018.
doi:10.1016/j.ceramint.2013.08.052 .

Đokić, Veljko, Marinković, Aleksandar, Ersen, Ovidiu, Uskoković, Petar, Petrović, Rada, Radmilović, Velimir R., Janaćković, Đorđe, "The dependence of the photocatalytic activity of TiO2/carbon nanotubes nanocomposites on the modification of the carbon nanotubes" in Ceramics International, 40, no. 3 (2014):4009-4018,
https://doi.org/10.1016/j.ceramint.2013.08.052 . .

TY  - JOUR
AU  - Zejak, Radomir
AU  - Nikolić, Irena
AU  - Blecić, Dragoljub
AU  - Radmilović, Vuk
AU  - Radmilović, Velimir R.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2257
AB  - In this paper we have investigated the influence of synthesis parameters on the mechanical properties of the fly-ash-based geopolymer paste and mortars. Moreover, the influence of an addition of limestone sand on the microstructure of fly-ash-based geopolymers was investigated as well. An addition of limestone sand increased the compressive strength of the fly-ash-based geopolymer mortar, in comparison to the strength of the geopolymer paste, by changing the composition of the gel phase in the geopolymer structure and with the physical strengthening due to the presence of well connected grains of the sand. The results have shown that the compressive strength and Young's modulus of elasticity of the fly-ash-based geopolymer mortar are correlated. The values of these parameters increase as the alkali and silicate dosages increase. At one point, they reach the maximum values and then start to decrease. On the other hand, the parameters that considerably increase the compressive strength slightly decrease the flexural strength of the geopolymer mortar.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar
EP  - 540
IS  - 4
SP  - 535
VL  - 47
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2257
ER  - 

@article{
author = "Zejak, Radomir and Nikolić, Irena and Blecić, Dragoljub and Radmilović, Vuk and Radmilović, Velimir R.",
year = "2013",
abstract = "In this paper we have investigated the influence of synthesis parameters on the mechanical properties of the fly-ash-based geopolymer paste and mortars. Moreover, the influence of an addition of limestone sand on the microstructure of fly-ash-based geopolymers was investigated as well. An addition of limestone sand increased the compressive strength of the fly-ash-based geopolymer mortar, in comparison to the strength of the geopolymer paste, by changing the composition of the gel phase in the geopolymer structure and with the physical strengthening due to the presence of well connected grains of the sand. The results have shown that the compressive strength and Young's modulus of elasticity of the fly-ash-based geopolymer mortar are correlated. The values of these parameters increase as the alkali and silicate dosages increase. At one point, they reach the maximum values and then start to decrease. On the other hand, the parameters that considerably increase the compressive strength slightly decrease the flexural strength of the geopolymer mortar.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar",
pages = "540-535",
number = "4",
volume = "47",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2257"
}

Zejak, R., Nikolić, I., Blecić, D., Radmilović, V.,& Radmilović, V. R.. (2013). Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar. in Materiali in Tehnologije
Institute of Metals and Technology., 47(4), 535-540.
https://hdl.handle.net/21.15107/rcub_technorep_2257

Zejak R, Nikolić I, Blecić D, Radmilović V, Radmilović VR. Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar. in Materiali in Tehnologije. 2013;47(4):535-540.
https://hdl.handle.net/21.15107/rcub_technorep_2257 .

Zejak, Radomir, Nikolić, Irena, Blecić, Dragoljub, Radmilović, Vuk, Radmilović, Velimir R., "Mechanical and microstructural properties of the fly-ash-based geopolymer paste and mortar" in Materiali in Tehnologije, 47, no. 4 (2013):535-540,
https://hdl.handle.net/21.15107/rcub_technorep_2257 .

TY  - JOUR
AU  - Nikolić, Irena
AU  - Zejak, Radomir
AU  - Janković-Častvan, Ivona
AU  - Karanović, Ljiljana
AU  - Radmilović, Vuk
AU  - Radmilović, Velimir R.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2273
AB  - This research has provided information about the influence of alkali cations (Na+ and K+) on the mechanical properties and durability of fly ash based geopolymers. The results have shown that alkali cations have a strong influence on the mechanical properties of fly ash based geopolymers. K-geopolymers generally reach a higher value of compressive strength in comparison to Na- geopolymers. On the other hand, microstructure and phase composition of fly ash based geopolymers are not influenced by the nature of alkali cations. The ratio of main gel structure forming elements is practically not affected by the nature of alkali cations. Durability of fly ash based geopolymers in different aquatic environments is greatly dependent on the choice of alkali cations. Na-geopolymers are generally more resistant in water and aggressive environments than the K-geopolymers. The best durability of fly ash based geopolymers was observed in sea water.
PB  - Slovenian Chemical Society
T2  - Acta Chimica Slovenica
T1  - Influence of Alkali Cation on the Mechanical Properties and Durability of Fly Ash Based Geopolymers
EP  - 643
IS  - 3
SP  - 636
VL  - 60
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2273
ER  - 

@article{
author = "Nikolić, Irena and Zejak, Radomir and Janković-Častvan, Ivona and Karanović, Ljiljana and Radmilović, Vuk and Radmilović, Velimir R.",
year = "2013",
abstract = "This research has provided information about the influence of alkali cations (Na+ and K+) on the mechanical properties and durability of fly ash based geopolymers. The results have shown that alkali cations have a strong influence on the mechanical properties of fly ash based geopolymers. K-geopolymers generally reach a higher value of compressive strength in comparison to Na- geopolymers. On the other hand, microstructure and phase composition of fly ash based geopolymers are not influenced by the nature of alkali cations. The ratio of main gel structure forming elements is practically not affected by the nature of alkali cations. Durability of fly ash based geopolymers in different aquatic environments is greatly dependent on the choice of alkali cations. Na-geopolymers are generally more resistant in water and aggressive environments than the K-geopolymers. The best durability of fly ash based geopolymers was observed in sea water.",
publisher = "Slovenian Chemical Society",
journal = "Acta Chimica Slovenica",
title = "Influence of Alkali Cation on the Mechanical Properties and Durability of Fly Ash Based Geopolymers",
pages = "643-636",
number = "3",
volume = "60",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2273"
}

Nikolić, I., Zejak, R., Janković-Častvan, I., Karanović, L., Radmilović, V.,& Radmilović, V. R.. (2013). Influence of Alkali Cation on the Mechanical Properties and Durability of Fly Ash Based Geopolymers. in Acta Chimica Slovenica
Slovenian Chemical Society., 60(3), 636-643.
https://hdl.handle.net/21.15107/rcub_technorep_2273

Nikolić I, Zejak R, Janković-Častvan I, Karanović L, Radmilović V, Radmilović VR. Influence of Alkali Cation on the Mechanical Properties and Durability of Fly Ash Based Geopolymers. in Acta Chimica Slovenica. 2013;60(3):636-643.
https://hdl.handle.net/21.15107/rcub_technorep_2273 .

Nikolić, Irena, Zejak, Radomir, Janković-Častvan, Ivona, Karanović, Ljiljana, Radmilović, Vuk, Radmilović, Velimir R., "Influence of Alkali Cation on the Mechanical Properties and Durability of Fly Ash Based Geopolymers" in Acta Chimica Slovenica, 60, no. 3 (2013):636-643,
https://hdl.handle.net/21.15107/rcub_technorep_2273 .

TY  - JOUR
AU  - Jokić, Bojan
AU  - Mitrić, Miodrag
AU  - Radmilović, Velimir R.
AU  - Drmanić, Saša
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1913
AB  - High temperature hydrothermal syntheses, using calcium nitrate tetrahydrate, sodium dihydrogen phosphate and urea as precursors, and characterization of hydroxyapatite (HAp) whiskers are reported herein. The morphology and chemical composition of the crystals from a monetite to a hydroxyapatite phase were controlled by varying the starting concentrations of the precursors and the solution pH through the amount of urea that is decomposed during heating. X-ray diffraction (XRD) analysis, infrared spectroscopy (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to investigate the products of the syntheses in order to find the optimum reaction conditions for obtaining the desired morphology and phase composition. Different morphologies ranging from single crystals of monetite through rods and plates of hydroxyapatite with different size distribution to whisker-like single hydroxyapatite crystal were achieved by simply varying the starting concentration of urea. Structural refinement of the hydroxyapatite whiskers confirmed a strong preferential orientation along the c-axis direction of the hexagonal crystal structure, which was significantly different from the usually observed random crystal orientation. TEM and SEM analysis of the apatite whiskers confirmed single crystal structure with the a c-axis orientation parallel to the long axis of the whiskers, with sizes up to 150 mu m in length, 10 mu m in width and with a thickness of about 300 nm, that grew from the same centre of nucleation, forming flaky-like particles.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Synthesis and characterization of monetite and hydroxyapatite whiskers obtained by a hydrothermal method
EP  - 173
IS  - 1
SP  - 167
VL  - 37
DO  - 10.1016/j.ceramint.2010.08.032
ER  - 

@article{
author = "Jokić, Bojan and Mitrić, Miodrag and Radmilović, Velimir R. and Drmanić, Saša and Petrović, Rada and Janaćković, Đorđe",
year = "2011",
abstract = "High temperature hydrothermal syntheses, using calcium nitrate tetrahydrate, sodium dihydrogen phosphate and urea as precursors, and characterization of hydroxyapatite (HAp) whiskers are reported herein. The morphology and chemical composition of the crystals from a monetite to a hydroxyapatite phase were controlled by varying the starting concentrations of the precursors and the solution pH through the amount of urea that is decomposed during heating. X-ray diffraction (XRD) analysis, infrared spectroscopy (IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to investigate the products of the syntheses in order to find the optimum reaction conditions for obtaining the desired morphology and phase composition. Different morphologies ranging from single crystals of monetite through rods and plates of hydroxyapatite with different size distribution to whisker-like single hydroxyapatite crystal were achieved by simply varying the starting concentration of urea. Structural refinement of the hydroxyapatite whiskers confirmed a strong preferential orientation along the c-axis direction of the hexagonal crystal structure, which was significantly different from the usually observed random crystal orientation. TEM and SEM analysis of the apatite whiskers confirmed single crystal structure with the a c-axis orientation parallel to the long axis of the whiskers, with sizes up to 150 mu m in length, 10 mu m in width and with a thickness of about 300 nm, that grew from the same centre of nucleation, forming flaky-like particles.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Synthesis and characterization of monetite and hydroxyapatite whiskers obtained by a hydrothermal method",
pages = "173-167",
number = "1",
volume = "37",
doi = "10.1016/j.ceramint.2010.08.032"
}

Jokić, B., Mitrić, M., Radmilović, V. R., Drmanić, S., Petrović, R.,& Janaćković, Đ.. (2011). Synthesis and characterization of monetite and hydroxyapatite whiskers obtained by a hydrothermal method. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(1), 167-173.
https://doi.org/10.1016/j.ceramint.2010.08.032

Jokić B, Mitrić M, Radmilović VR, Drmanić S, Petrović R, Janaćković Đ. Synthesis and characterization of monetite and hydroxyapatite whiskers obtained by a hydrothermal method. in Ceramics International. 2011;37(1):167-173.
doi:10.1016/j.ceramint.2010.08.032 .

Jokić, Bojan, Mitrić, Miodrag, Radmilović, Velimir R., Drmanić, Saša, Petrović, Rada, Janaćković, Đorđe, "Synthesis and characterization of monetite and hydroxyapatite whiskers obtained by a hydrothermal method" in Ceramics International, 37, no. 1 (2011):167-173,
https://doi.org/10.1016/j.ceramint.2010.08.032 . .

TY  - JOUR
AU  - Stojanović, Dušica
AU  - Orlović, Aleksandar
AU  - Glišić, Sandra
AU  - Marković, Smilja
AU  - Radmilović, Velimir R.
AU  - Uskoković, Petar
AU  - Aleksić, Radoslav
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1701
AB  - The objective of this study is to investigate and compare methods of nanosilica coating with gamma-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d(50) value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 degrees C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation.
PB  - Elsevier, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol
EP  - 284
IS  - 3
SP  - 276
VL  - 52
DO  - 10.1016/j.supflu.2010.02.004
ER  - 

@article{
author = "Stojanović, Dušica and Orlović, Aleksandar and Glišić, Sandra and Marković, Smilja and Radmilović, Velimir R. and Uskoković, Petar and Aleksić, Radoslav",
year = "2010",
abstract = "The objective of this study is to investigate and compare methods of nanosilica coating with gamma-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d(50) value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 degrees C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol",
pages = "284-276",
number = "3",
volume = "52",
doi = "10.1016/j.supflu.2010.02.004"
}

Stojanović, D., Orlović, A., Glišić, S., Marković, S., Radmilović, V. R., Uskoković, P.,& Aleksić, R.. (2010). Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids
Elsevier, Amsterdam., 52(3), 276-284.
https://doi.org/10.1016/j.supflu.2010.02.004

Stojanović D, Orlović A, Glišić S, Marković S, Radmilović VR, Uskoković P, Aleksić R. Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids. 2010;52(3):276-284.
doi:10.1016/j.supflu.2010.02.004 .

Stojanović, Dušica, Orlović, Aleksandar, Glišić, Sandra, Marković, Smilja, Radmilović, Velimir R., Uskoković, Petar, Aleksić, Radoslav, "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol" in Journal of Supercritical Fluids, 52, no. 3 (2010):276-284,
https://doi.org/10.1016/j.supflu.2010.02.004 . .