Novel sol–gel derived cellular foam: reaction of an organotrialkoxysilane with sodium hypophosphite

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• 作者：Christian Schramm ; Beate Rinderer ; Wolfgang H. Binder ; Richard Tessadri and Heinz Duelli
• 关键词：Sol–gel process ; Polysilsesquioxane ; Foam
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2008
• 出版时间：January, 2008
• 年：2008
• 卷：45
• 期：1
• 页码：83-88
• 全文大小：420.6 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Inorganic Chemistry
  Optical and Electronic Materials
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-4846

文摘

(3-Triethoxysilylpropyl)succinic anhydride (TESP-SA) is an organo-functional silicon compound that can be converted into a polysilsesquioxane when it is hydrolyzed and subsequently subjected to a condensation reaction at elevated temperatures (>160 °C). If this process is performed without sodium hypophosphite (SHP), a hard solid material is obtained. In contrast, the condensation reaction of TESP-SA in conjunction with SHP results in the formation of a foamed, brittle material with closed macro cells. The foam was characterized by means of various analytical methods (FT-IR, 29Si MAS NMR, XRD, TG-MS, SEM).