Semi-permeable membrane and the concentration difference electric power generation method using a method of manufacturing the same, a semi-permeable membrane

摘要

have a high water permeability, and provides a semi-permeable membrane suitable for the concentration difference generator having a high mechanical strength. A dense layer A having a substantial solute removal ability, fine two layers of the porous layer B to be at least provided with a semipermeable membrane, a polymer wherein the dense layer A has a repeating unit structure shown below (Equation 1) semi-permeable membrane as a main component. (Wherein, Ar1, Ar2, Ar3, Ar4 is any aromatic ring structure, respectively, R1, R2, R3, R4 are each hydrogen atom or structure P, the structural P is alkyl group, or a carboxylic acid salts, alkylsulfonic acid or a salt thereof, alkyl phosphoric acid or salt thereof is any structure selected from,, X is a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, phosphoric acid group or a salt thereof, is any structure selected from, m, n represents the component ratio of the repeating unit structure (%), when m 0, n 0, m + n = 100 to satisfy m = 0, at least of the R3, R4 one is the structure P.)