Polymer-impregnated materials ceramics

Sato, K., Morizumi, H., Tezuka, A., Furuyama, O., andlsoda, T. (1993). Interface and mechanical properties of ceramic fiber reinforced silicon nitride composites prepared by a preceramic polymer impregnation method, High-Temperature Ceramic-Matrix Composite II Manufacturing and Materials Development, pp. 199-203, Evans, A. G. and Naslain, R. eds., Westerville, OH The American Ceramic Society. 

Nafion [253], poly(vinyl alcohol) [254], and polyamide-6,6 [255]. A procedure often followed for polymers soluble in tetrahydrofuran (THF) is to add TEOS to a THE solution of the polymer, followed by addition of water (4 moles based on Si) in the form of 0.15 M HCl or 0.1 M NH4OH and allowing the reaction to take place. Films are made by casting on an inert substrate such as Teflon and drying under proper conditions. Nafion composite films are made by impregnating swoDen Nafion films in alcohol solution of TEOS. The micro- or nanocomposite films made by the sol-gel process are expected to have technological opportunities in important arena of gas-liquid separations, heterogeneous catalysis, electronic materials, and ceramic precursors. 

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