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Composite gas separation membrane having a gutter layer comprising a crosslinked polar phenyl-containing - organopolysiloxane, and method for making the same -
Composite gas separation membrane having a gutter layer comprising a crosslinked polar phenyl-containing - organopolysiloxane, and method for making the same -
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机译:具有包含交联的极性苯基-有机聚硅氧烷的檐槽层的复合气体分离膜及其制备方法-
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摘要
This invention provides a composite gas separation membrane comprising: (a) a porous polyacrylonitrile structural support material having a polyacrylonitrile surface; (b) a gutter layer coating comprising a crosslinked polar phenyl-containing-organopolysiloxane material on the polyacrylonitrile surface of the structural support material, leaving an uncoated gutter layer surface; and (c) an ultrathin 6FDA type polyimide selective membrane layer coating on the uncoated gutter layer surface. In preferred embodiments, the phenyl-containing-organopolysiloxane material additionally comprises a silica-sol. Processes for making the composite gas separation membrane and for using the membrane to carry out gas separations are also provided.
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