Gas permselective composite membrane and preparation thereof

Abstract

PURPOSE: To prepare a gas permselective composite membrane having high properties, by applying a polymer having an aromatic ring contained in the polymer main chain thereof to a polymer support and the surface thereof by high frequency sputtering. CONSTITUTION: A polymer material having the most excellent gas permeability is polydimethylsiloxane. A siloxane polymer obtained by containing a phenyl group, a vinyl group or a fluoro group in said polymer material or a siloxane copolymer such as a polydimethylsiloxane/carbonate block copolymer or a polydimethylsiloxane/α-methylstyrene block copolymer has excellent gas permeability and suitably utilized as the polymer support of this invention. A polymer vapor deposition membrane developing substantially gas permselective function is laminated to the polymer support by high frequency sputtering. COPYRIGHT: (C)1985,JPO&Japio

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