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《Journal of Changchun University of Science and Technology(Natural Science Edition)》 2008-03
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Studies on the Optimum Preparation Conditions of the Silica Aerogels

GAO Xiuxia1 ,WU Zhen1,ZHANG Weina2,CHEN Qingyu3,REN Min4,ZHU Guoyi4 (1.School of Chemistry and Environmental Engineering,Changchun University of Science and Technology,Changchun 130022;2. School of Chemistry ,Jilin Normal University ,Siping 136000; 3. Beijing Insitute of Techology ,Beijing 100081;4.State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry ,Chinese Academy of Sciences,Changchun 130022)  
Resently,the studies of silica aerogels have been more and more extensive.Used as the lightest solid material,silica aerogels have many unique properties and the best property in thermal insulation. But the key of studying is the preparation con-ditions. In this paper,the orthogonal experiment had been designed by using four factors and three levels to study their optimal preparation conditions at ambient pressure,and the influences of the four factors TEOS,water,ethanol,pH values to silica aerogels properties had also been studied. The results showed that the sample prepared at the conditions of TEOS:H2O:EtOH=1: 6:5(mol ratio)pH=6~7 and the temperature of 70℃ under the water bathing had better properties.
【Fund】: 吉林省教育厅项目(2007)
【CateGory Index】: O613.72
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