Synthesis of new flexible aerogels from di- and trifunctional organosilanes

Gen Hayase, Kazuyoshi Kanamori, Kazuki Nakanishi, Teiichi Hanada

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Recent years, although silica aerogels are expected to be the promising material for energy savings, the lack of mechanical strength prevents from commercial applications such as to low-density thermal insulators. To improve mechanical properties, methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS) are used in this study as the co-precursor of aerogels 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 in aqueous sol and must be suppressed to obtain uniform and monolithic gel. We 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
ホスト出版物のタイトルAerogels and Aerogel-Inspired Materials
ページ68-73
ページ数6
DOI
出版ステータスPublished - 2011
外部発表はい
イベント2010 MRS Fall Meeting - Boston, MA, United States
継続期間: 2010 11 292010 12 3

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1306
ISSN(印刷版)0272-9172

Other

Other2010 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period10/11/2910/12/3

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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