| 摘要 |
PURPOSE:To obtain the title membrane of a low resistance by forming a bilayer composed of a specified porous polyhydrocarbon olefin or polyfluoroolefin membrane and a thin ion exchange polymer membrane. CONSTITUTION:This membrane is constituted by forming a bilayer from a porous polyhydrocarbon olefin (e.g. PE) or polyfluoroolefin (e.g. polytetrafluoroethylene) membrane having a pore diameter of 0.01-5mum, a porosity of 30-90%, a thickness of 10-200mum and a hydrophilic pore wall and a thin ion exchange polymer membrane desirably comprising a product obtained by sulfonating a polysulfone polymer having an aromatic polysulfone block copolymer structure of formula I (wherein Ar is a group of any one of formulas II-IV; Y is a single bond, -O- or a group of formula V; R<1-9> are each a 1-8C hydrocarbon group; a-d are each 0-4; e is 0-3; f+g=0-7; h+i=0-5; R<10-11> are each H or 1-6C hydrocarbon group; X is -O- or -S-; m/n is 100/1-1/10; and z is 1-100) or introducing a quat. ammonium salt group into the polysulfone polymer. |
