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|1. (WO2018124103) COMPOSITE SEMI-PERMEABLE MEMBRANE AND METHOD FOR PRODUCING SAME|
|Applicants:||TORAY INDUSTRIES, INC.
|Title:||COMPOSITE SEMI-PERMEABLE MEMBRANE AND METHOD FOR PRODUCING SAME|
The purpose of the present invention is to provide a composite semi-permeable membrane capable of achieving excellent fouling resistance over a long period of time. The present invention pertains to a composite semi-permeable membrane comprising: a supporting membrane (a substrate and a porous supporting layer); and a separation function layer that is provided on the porous supporting layer and includes a crosslinked polyamide and a hydrophilic polymer, the composite semi-permeable membrane satisfying condition (A) (the hydrophilic polymer includes a positively-charged functional group and a negatively-charged functional group, and the hydrophilic polymer is negatively charged); and condition (B) (the hydrophilic polymer is covalently bonded to the crosslinked polyamide).