New transparent methylsilsesquioxane aerogels and xerogels with improved mechanical properties
New transparent methylsilsesquioxane aerogels and xerogels with improved mechanical properties
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DOI：
10.1002/adma.200602457
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发表时间：
2007-06-18
影响因子：
29.4
通讯作者：
Hanada, Teiichi
中科院分区：
文献类型：
--
作者：
Kanamori, Kazuyoshi;Aizawa, Mamoru;Hanada, Teiichi
透明的有机-无机混合气凝胶和干凝胶是通过使用溶胶-凝胶合成从一个单一的三官能前体，甲基三甲氧基硅烷（见图）。所获得的气凝胶对单轴压缩表现出可逆的收缩-恢复响应。气凝胶状干凝胶是通过在环境压力下蒸发干燥成功地获得的，因为凝胶从由干燥溶剂的毛细管力引起的暂时收缩中恢复。孔隙性质和纳米纹理得到很好的保存在所得的干凝胶。
Transparent organic-inorganic hybrid aerogels and xerogels are prepared by using a sol-gel synthesis from a single trifunctional precursor, methyltrimethoxysilane (see figure). Obtained aerogels show a reversible shrinkage-recovery response against uniaxial compression. Aerogel-like xerogels are successfully obtained by evaporation drying under ambient pressure because the gels recover from the temporal shrinkage caused by the capillary force of a drying solvent. Pore properties and nanotextures are well-preserved in the resultant xerogels.