申请人:Toray Industries, Inc.
公开号:EP3238815A1
公开(公告)日:2017-11-01
The present invention relates to a composite semipermeable membrane which is excellent in terms of oxidation resistance and acid resistance while retaining water permeability. The present invention relates to a composite semipermeable membrane including a supporting membrane and a separation functional layer disposed on the supporting membrane, in which the separation functional layer comprises an aromatic polyamide, the aromatic polyamide has side chains and terminal groups, at least one of the side chains and terminal groups of the aromatic polyamide being an amino group, at least one of the side chains and terminal groups of the aromatic polyamide is a substituent having a structure represented by formula (1): -NXY or formula (2): - NXYZ, and in the aromatic polyamide, a content A of substituents having structures represented by formula (1) and formula (2) and a content B of amide groups satisfy 0.005≤A/B≤0.15, provided that, in formula (1) and formula (2), N is a nitrogen atom, and at least one selected from X, Y, and Z is any of O, OH, a benzenesulfonyl group, a methanesulfonyl group, a dimethylsulfonyl group, a p-toluenesulfonyl group and an o-nitrobenzenesulfonyl group, the remainder of the X, Y, and Z being a hydrogen atom.
本发明涉及一种复合半透膜,该膜在保持透水性的同时,具有优异的抗氧化性和耐酸性。本发明涉及一种复合半透膜,包括支撑膜和设置在支撑膜上的分离功能层,其中分离功能层包括芳香族聚酰胺,芳香族聚酰胺具有侧链和末端基团,芳香族聚酰胺的侧链和末端基团中至少有一个是氨基,芳香族聚酰胺的侧链和末端基团中至少有一个是具有式(1)所代表结构的取代基:-NXY或式(2):- NXYZ,且在芳香族聚酰胺中,具有式(1)和式(2)所代表结构的取代基的含量 A 和酰胺基的含量 B 满足 0.005≤A/B≤0.15,条件是在式(1)和式(2)中,N 是氮原子,至少一个选自 X、Y 和 Z 的基团是 O、OH、苯磺酰基、甲磺酰基、二甲基磺酰基、对甲苯磺酰基和邻硝基苯磺酰基中的任一基团,X、Y 和 Z 的其余部分是氢原子。