Preparation of composite separation film

Abstract

Abstract PURPOSE:To prepare a composite separation film having heat resistance and mechanical strength and excellent in gas permeation and gas separation capacities, by coating a dilute solution of an other heat resistant polymer is coated on an aromatic polyimide microporous film and the obtained coating film is dried. CONSTITUTION:On a microporous film prepared from aromatic polyamic acid or aromatic polyimide obtained by polymerizing an aromatic tetracarboxylic acid component and an aromatic diamine, a polymer solution obtained by dissolving a heat resistant polymer such as poly (2;6-diphenylphenylene oxide), polysulfone or silicone rubber (polydimethylsiloxane) in an aromatic polyimide insoluble solvent such as benzene is coated and the formed coating film is dried while gradually heated. By this method, a composite film having high separation capacity of H2 from CO can be stably prepared in good reproducibility.

Inventors

• 👤 Hiroshi Makino
• 👤 牧埜　弘
• 👤 Yoshihiro Kusuki
• 👤 楠木　喜博
• 👤 Takashi Harada
• 👤 隆 原田
• 👤 Hiroshi Shimazaki
• 👤 寛史 島崎
• 👤 Toshio Ishida
• 👤 石田　利夫

Bibliographic Details