| 主权项 |
1: A porous separation membrane, comprising:
a porous surface layer, said surface layer comprising a polymer composition comprising a polymeric bulk material (P1) in admixture with an amphiphilic polyethersulfone block copolymer (P2), wherein the amphiphilic polyethersulfone block copolymer (P2) comprises: at least one hydrophobic block unit (A) and at least one hydrophilic block unit (B) of general formulae: wherein: R1 is —COO-alkylene-OR7, —COO-alkylene-SO3−M+, —COO-alkylene-NR8R9R10—COO-alkylene-NHR8, —COO-alkylene-N+R8R9R11W−—CO—Z—N—R8R9, or optionally substituted N-heterocyclyl; R2 is hydrogen, halogen, optionally substituted alkyl, perfluorinated alkyl, optionally substituted aryl, cyano, nitro, amino, or heterocyclyl; R3, R4 independently are hydrogen, halogen, optionally substituted alkyl, perfluorinated alkyl, optionally substituted aryl, cyano, nitro, amino, or heterocyclyl; R5, R6 independently are hydrogen, halogen, or sulfonic acid; n is an integer in a range from 20 to 80; x is an integer in a range from 1 to 20; R7 is hydrogen, alkyl, or alkoxy-alkyl; R8, R9 independently are hydrogen, optionally substituted alkyl; R10 is -alkylene-SO3−; is hydrogen, alkyl, or aryl-alkyl, is alkylene or a chemical bond; X is halogen, hydrogen or another block unit (B) wherein X, x, and R1 to R4 are as defined above; W is halogen, OTf, BF4, BPh, PF6 or SbF6; M is alkaline metal or alkaline earth metal; wherein said polymeric bulk material (P1) is polyethersulfone (PESU), sulfonated polyethersulfone, polysulfone (PSU), sulfonated polysulfone, polyphenylsulfone (PPSU), or sulfonated polyphenylsulfone, or blends thereof, and wherein the weight ratio of P1:P2 is in the range of 1:0.02 to 0.3. |
