Pore structure and mechanical properties of poly(methylsilsesquioxane) aerogels

K. Kanamori, G. Hayase, K. Nakanishi, T. Hanada

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Organic-inorganic hybrid aerogels have been prepared by an acid/base two-step sol-gel reaction utilizing urea and surfactant. Polycondensation of methyltrimethoxysilane (MTMS) is promoted by the hydrolysis of urea, and the hydrophobicity of condensates is weakened by adequate cationic or nonionic surfactant. Aerogels with low bulk density (∼ 0.13 g cm-3) and high visible light transmittance (∼ 89 % at 550 nm through 10 mm-thick sample) are obtained. The resultant hybrid aerogels show high deformability and subsequent spring-back upon uniaxial compression owing to the lower cross-linking density and residual silanol density compared to silica, and to the presence of hydrophobic methyl groups in the network. Additional aging of as-prepared wet gels in water improved mechanical properties in the case of cationic surfactant system.

Original languageEnglish
Article number032001
JournalIOP Conference Series: Materials Science and Engineering
Volume18
Issue numberSYMPOSIUM 2A
DOIs
Publication statusPublished - 2011 Jan 1
Event3rd International Congress on Ceramics, ICC 2011 - Osaka, Japan
Duration: 2010 Nov 142010 Nov 18

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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