Effect of different reaction solvents on the hydrophobic and structural properties of silica cryogels

Li Fen Su, Lei Miao, Sakae Tanemura, Gang Xu

研究成果: Conference contribution

抄録

The experimental results on the microstructural and physical properties of the TEOS-based silica cryogels have been reported. The cryogels were produced by two-step sol-gel process followed by vacuum freeze drying. The wet gels were synthesized via acid-base catalysis using tetraethoxysilane (TEOS) as a silica precursor, the different solvents containing ethanol (EtOH), methanol (MeOH) and tert-butanol (TBA), the molar ratio of TEOS / solvent were varied from 1:6 to 1:13. Further, the microstructure and specific surface area of the cryogels were analysed by Scanning Electron Microscopy (SEM) and nitrogen absorption/desorption isotherms. The hydrophobicity of the cryogels was studied by contact angle. It was found that the highest specific surface area (1040.17 m2/g) was obtained with the solvent of MeOH. The lowest density (0.074 g/cm3) was acquired with the solvent of EtOH.

本文言語English
ホスト出版物のタイトルOptoelectronic Materials
編集者Yuan Ming Huang
出版社Trans Tech Publications Ltd
ページ1238-1241
ページ数4
ISBN(印刷版)0878492119, 9780878492114
DOI
出版ステータスPublished - 2011
外部発表はい

出版物シリーズ

名前Materials Science Forum
663-665
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

ASJC Scopus subject areas

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

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