Synthesis of new flexible aerogels from MTMS/DMDMS via ambient pressure drying

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

研究成果: Conference article査読

13 被引用数 (Scopus)

抄録

Although silica aerogel is expected to be the material for energy savings, the lack of the strength prevents from commercial applications such as to low-density thermal insulators and acoustic absorbents. To improve mechanical properties, methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS) are used as the co-precursor of aerogels in this study because the network becomes flexible due to the relatively low cross-linking density and to the unreacted methyl groups. Because of the strong hydrophobicity of MTMS/DMDMS-derived condensates, phase separation occurs, which must be suppressed in aqueous sol to obtain uniform and monolithic gel networks. We also employed surfactant n-hexadecyltrimethylammonium chloride (CTAC) in starting compositions to control phase separation during a 2-step acid/base sol-gel reaction. By changing the starting composition, various microstructures of pores are obtained. In the uniaxial compression test, the aerogel showed high flexibility and spring-back to the original shape after removing the stress.

本文言語English
論文番号032013
ジャーナルIOP Conference Series: Materials Science and Engineering
18
SYMPOSIUM 2A
DOI
出版ステータスPublished - 2011
外部発表はい
イベント3rd International Congress on Ceramics, ICC 2011 - Osaka, Japan
継続期間: 2010 11月 142010 11月 18

ASJC Scopus subject areas

  • 材料科学(全般)
  • 工学(全般)

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