Preparation and Characterization of Hydrophobic Silica Aerogel by Ambient Pressure Drying Method

Hui Xu; Gui Ln Fu; Yu Qiang Guo; Jing Chun Tu; Yong Chen

doi:10.4028/www.scientific.net/KEM.544.144

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 544Preparation and Characterization of Hydrophobic...

Preparation and Characterization of Hydrophobic Silica Aerogel by Ambient Pressure Drying Method

Abstract:

Silica aerogel has been prepared by ambient pressure drying technique using water glass as starting materials. Solvent exchange and surface modification were simultaneously conducted by immersing the wet hydrogel in EtOH/TMCS(Tri Methyl Chloro Silane)/hexane solution. The silica aerogel was obtained with the density of 0.110g•cm^-3 and 95.2% porosity. The specific surface area of the silica aerogel was 472.5m²•g^-1 with a average pore size distrubution of 27.5nm. FT-IR spectrum analysis showed that the surface of the silica aerogel was modified by Si-CH₃ groups, which allowed the aerogel to be hydrophobic.

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Periodical:

Key Engineering Materials (Volume 544)

Pages:

144-147

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.544.144

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Online since:

March 2013

Authors:

Hui Xu, Gui Ln Fu, Yu Qiang Guo, Jing Chun Tu, Yong Chen

Keywords:

Aerogel, Hydrophobicity, Porosity, Water Glass

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References

[1] B.M. Gauthier, S.D. Bakrania, A.M. Anderson, M.K. Corroll, A fast supercritical extraction technique for aerogel fabrication, J. Non-Cryst: Solids. 350 (2004) 238-243.

DOI: 10.1016/j.jnoncrysol.2004.06.044

Google Scholar

[2] A. Soleimani Dorcheh, M.H. Abbasi, Silica aerogel: Synthesis, properties and characterization, J. Mater. Process. Technol, 199 (2008) 10-26.

DOI: 10.1016/j.jmatprotec.2007.10.060

Google Scholar

[3] J. Chandradass, Sung Kang, Dong-sik Bae, Synthesis of silica aerogel blanket by ambient drying method using water glass based precursor and glass wool modified by alumina sol, J. Non-Cryst: Solids. 354 (2008) 4115-4119.

DOI: 10.1016/j.jnoncrysol.2008.03.039

Google Scholar

[4] R. Akkari, A. Ghorbel, N. Essayem, F. Figueras, Sulfated zirconia grafted on a mesoporous silica aerogel: Influence of the preparation parameters on textural, structural and catalytic properties, Microporous and Mesoporous Materials. 111 (2008).

DOI: 10.1016/j.micromeso.2007.07.005

Google Scholar

[5] T. Sobha Rani, M. C. S. Subha, G. Venkata Reddy, Y.H. Kim, Y.S. Ahn, Synthesis of water-glass-based silica aerogel powder via with and without squeezing of hydrogels, Journal of Applied Polymer Science. 115 (2010) 1675–1679.

DOI: 10.1002/app.31191

Google Scholar

[6] S.K. Hong, M.Y. Yoon, H.J. Hwang, Fabrication of Spherical Silica Aerogel Granules from Water Glass by Ambient Pressure Drying, J. Am. Ceram. Soc. 94 (10) (2011) 3198–3201.

DOI: 10.1111/j.1551-2916.2011.04765.x

Google Scholar

[7] B. Zhou, J. Shen, Y. Wu, et al., Hydrophobic silica aerogels derived from polyethoxydisiloxane and perfluoroalkylsilane, Materials Science and Engineering. C 27 (2007) 1291–1294.

DOI: 10.1016/j.msec.2006.06.032

Google Scholar