常压干燥制备高弹性气凝胶

功能材料, 2011, 42(1): 151-154.

常压干燥制备高弹性气凝胶

祖国庆 ^1, , 沈军 ^2, , 倪星元 ^3, , 李宇农 ^4,

1.同济大学波耳固体物理研究所,上海市人工微结构材料与技术重点实验室,上海,200092

2.同济大学波耳固体物理研究所,上海市人工微结构材料与技术重点实验室,上海,200092

3.同济大学波耳固体物理研究所,上海市人工微结构材料与技术重点实验室,上海,200092

4.同济大学波耳固体物理研究所,上海市人工微结构材料与技术重点实验室,上海,200092

基金项目: 国家自然科学基金青年基金(50802064):) 上海市重点实验室资助项目(07DZ22302) 上海市晨光计划资助项目(2007CG26)

关键词：气凝胶 , 甲基三甲氧基硅烷 , 弹性 , 低热导率 , 疏水性

Preparation of elastic aerogels at ambient pressure

以甲基三甲氧基硅烷(MTMS)为硅源,水为溶剂,醋酸和氨水为酸碱催化剂,采用酸碱两步法,六甲基二硅胺烷(HMDS)作为表面修饰剂,常压干燥制备了半透明、块体气凝胶.得到的气凝胶疏水性很好(接触角为158°),具有很好的弹性性能,良好的保温隔热性能(热导率为0.031W/(m·K)).用扫描电镜、比表面积与孔径分析仪、力学分析仪、hotdisk热分析,仪等仪器对气凝胶的微观形貌、孔结构、力学、热学等性能进行了表征与研究.

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常压干燥制备高弹性气凝胶

Preparation of elastic aerogels at ambient pressure

参考文献