Preparation and Characterization of Silica Aerogels Derived from Ambient Pressure

材料科学技术（英文）, 2006, 22(6): 798-802.

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1.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

2.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

3.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

4.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

5.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

6.Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China

基金项目: 上海市科技委员会科研基金(055211010;0352nm022;0352nm056) 国家高技术研究发展计划(863计划)(2002AA842052) Shanghai Key Subject Programme, Shanghai Phospher Program(05QMH1413) 教育部跨世纪优秀人才培养计划国家自然科学基金(20133040;59802007;69978017)

Preparation and Characterization of Silica Aerogels Derived from Ambient Pressure

Keywords： Silica aerogel

Silica aerogels were prepared by sol-gel technique from industrial silicon derivatives (polyethoxydisiloxanes, E40), followed by silylation and drying under ambient pressure. The specific surface area, pore size distribution and thermal conductivity of the silica aerogels were investigated and the results showed that the diameter of the silica particles is about 6 nm and the average pore size of the silica aerogels is 14.7 nm. The specific temperature and pressure of 1.01×105 Pa. The Si-CH3 groups were also detected on the internal surface of the silica aerogels, which show hydrophobic. Silica aerogels derived by this technique is low cost and have wide applications.

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Preparation and Characterization of Silica Aerogels Derived from Ambient Pressure

参考文献