Nitrogen and Water Sorption Properties of Ethyl-Substituted Silica Aerogels and Xerogels-Reference-Cited by-同舟云学术

Nitrogen and Water Sorption Properties of Ethyl-Substituted Silica Aerogels and Xerogels

Published:1994 Issue: Volume:371 Page:
ISSN:0272-9172
Container-title:MRS Proceedings
language:en
Short-container-title:MRS Proc.

Author:

Liu Chunling,Komarneni Sridhar

Abstract

AbstractHigh surface area ethyltrimethoxysilane (ETMS) modified silica aerogels and xerogels were synthesized by cohydrolyzing the mixtures of ETMS and tetramethylorthosilicate (TMOS). The effects of ETMS content, pH value and solvent addition were investigated. The surface area, pore structure and hydrophobicity were studied using nitrogen and water sorption measurements. By ETMS modification of TMOS gels, high surface area, density and hydrophobicity were achieved. The 25 mole% ETMS-75 mole% TMOS was found to be the best composition for both aerogel and xerogel, which are hydrophobic and have surface areas of 1221 and 832 m2/g, respectively.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

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