%0 Journal Article
%T Hydrophobic Sio2 Aerogels Prepared with Polyethoxydisiloxanes<br>疏水型SiO2气凝胶
%A DENG Zhong-Sheng
%A WEI Jian-Dong
%A Wu Ai-Mei
%A BAO Yu-Ping
%A WANG Jue
%A SHEN Jun
%A ZHOU Bin
%A CHEN Ling-Yan
%A <br>邓忠生
%A 魏建东
%A 吴爱梅
%A 暴玉萍
%A 王珏
%A 沈军
%A 周斌
%A 陈玲燕
%J 无机材料学报
%D 2000
%I Science Press
%X Hydrophobic SiO2 aerogels were produced by the surface modification of alcogels prepared via sol-gel process using polyethoxydisiloxanes (E-40) as the precursor and followed by ethanol supercritical drying. The structure of the modified silica aerogels was a silica matrix produced by hydrolysis and condensation of polyethoxydisiloxanes. Si-CH3 was modified on the surface of the silica matrix. The pore size decreased from 23.1nm to 18.2nm, the specific surface area increased from 477 m2·g-1 to 563 m2·g-1 and the water vapor adsorption decreased from 0.04 to 0.0012(weight ratio) after the surface modification of silica aerogels. The existence of Si-CH3 was observed using infrared spectra.
%K hydrophobic
%K SiO2 aerogel
%K sol-gel
%K surface modification
%K super critical drying<br>气凝胶
%K 表面修饰
%K 超临界干燥
%K 二氧化硅
%K 疏水型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=A045A6E393618A38&yid=9806D0D4EAA9BED3&vid=23CCDDCD68FFCC2F&iid=0B39A22176CE99FB&sid=B9B90065CF5CD7F0&eid=05340B75C67FF664&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=9&reference_num=3