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公开(公告)号：US10569230B2
公开(公告)日：2020-02-25
申请号：US15577926
申请日：2016-05-30
摘要： An air-impermeable water vapor transport membrane comprises an active layer on a microporous polymeric substrate. The active layer comprises a polyethylene-oxide containing copolymer and a polar protic solvent in an amount of about 3% to about 100% of copolymer weight in the active layer. Molecules of the protic solvent are bonded to the copolymer. The polar protic solvent reduces temperature-dependent variability in the water-vapor permeability of the membrane.
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公开(公告)号：US10139116B2
公开(公告)日：2018-11-27
申请号：US15319483
申请日：2015-06-16
IPC分类号： B01D53/22 , B01D53/26 , B01D69/10 , B01D71/16 , B01D71/52 , B01D71/82 , F24F3/147 , C08G65/48 , C08J7/04 , C09D101/12 , C09D171/00 , C09D101/14 , C09D101/28 , B01D69/02 , B01D69/12 , D06M15/07 , D06M15/53 , D06N3/00 , D06N3/02 , D06N3/12 , B01D61/36 , F24F3/14
摘要： Water vapor transport membranes for ERV and other water vapor transport applications are provided. The membranes include a substrate and an air impermeable selective layer coated on the substrate, the selective layer including a cellulose derivative and a sulfonated polyaryletherketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the selective layer includes s PEEK and CA in an s PEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3. Methods for making such membranes are provided. The methods include applying a coating solution/dispersion to a substrate and allowing the coating solution/dispersion to dry to form an air impermeable selective layer on the substrate, the coating solution/dispersion including a cellulose derivative and a sulfonated polyarylether ketone. In some embodiments the sulfonated polyaryletherketone is in a cation form and/or the coating solution/dispersion includes s PEEK and CA in an sPEEK:CA (wt.:wt.) ratio in the range of about 7:3 to 2:3.
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