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Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol

Authorized Users Only
2010
Authors
Stojanović, Dušica
Orlović, Aleksandar
Glišić, Sandra
Marković, Smilja
Radmilović, Velimir R.
Uskoković, Petar
Aleksić, Radoslav
Article (Published version)
Metadata
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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 th...e 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.

Keywords:
Supercritical coating / Nanoparticles / Silanization / Supercritical mixture of carbon dioxide and ethanol / Nanocomposite
Source:
Journal of Supercritical Fluids, 2010, 52, 3, 276-284
Publisher:
  • Elsevier, Amsterdam
Funding / projects:
  • Sinteza funkcionalnih materijala sa kontrolisanom strukturom na molekularnom i nano nivou (RS-142006)
  • U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]

DOI: 10.1016/j.supflu.2010.02.004

ISSN: 0896-8446

WoS: 000277058200005

Scopus: 2-s2.0-77949320349
[ Google Scholar ]
29
22
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1701
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
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
UR  - conv_3386
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",
url = "conv_3386"
}
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
conv_3386
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
conv_3386 .
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 .,
conv_3386 .

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