Paper Title:
Preparation and Properties of Hydrophobic Silica Aerogels by Ambient Pressure Drying Method
  Abstract

Silica alcogels were prepared by hydrolysis with hydrochloric acid and condensation with NH4OH of ethanol diluted tetraethylorthosilicate (TEOS) precursor and trimethylchlorosilane and hexane as surface modifying agent. The physical properties such as density, appearance, hydrophobicity, surface area, pore size distribution and thermal stability were measured. It was found that the physical and hydrophobic properties of the silica aerogels depend on the TMCS/hexane (V) volume ratio. The density decreased with increase of V, and the aerogels are more hydrophobic as V=3%. The aerogels were thermally stable up to a temperature of 350 °C, and the aerogel prepared has a high surface area and large pore volume.

  Info
Periodical
Chapter
Chapter 2: Frontiers of Building Materials
Edited by
Dongye Sun, Wen-Pei Sung and Ran Chen
Pages
1040-1043
DOI
10.4028/www.scientific.net/AMM.71-78.1040
Citation
H. Wang, S. M. Liu, L. K. Zeng, "Preparation and Properties of Hydrophobic Silica Aerogels by Ambient Pressure Drying Method", Applied Mechanics and Materials, Vols. 71-78, pp. 1040-1043, 2011
Online since
July 2011
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Price
$32.00
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