Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Papers
Sol-gel synthesis, porous structure, and mechanical property of polymethylsilsesquioxane aerogels
Kazuyoshi KANAMORIKazuki NAKANISHITeiichi HANADA
Author information
JOURNAL FREE ACCESS

2009 Volume 117 Issue 1372 Pages 1333-1338

Details
Abstract

Organic-inorganic hybrid aerogels with polymethylsilsesquioxane (PMSQ, CH3SiO1.5) composition have been synthesized by a modified two-step sol-gel process. The precursor alkoxysilane is hydrolyzed in a weakly acidic condition, and subsequently allowed to undergo polycondensation in a weakly basic condition which is brought up by the hydrolysis of urea. Two kinds of surfactant (nonionic and cationic) have been utilized to suppress macroscopic phase separation. The resultant porous morphology could be modified by the kind of surfactant used. Small angle X-ray scattering (SAXS) and nitrogen adsorption have been employed to assess the porous morphology and it is found that the obtained PMSQ aerogels consist of aggregated particles and each particle contains micropores. Compressive mechanical properties have also been discussed based on the obtained information on porous morphology.

Content from these authors
© 2009 The Ceramic Society of Japan
Previous article Next article
feedback
Top