COMPOSITE SEMIPERMEABLE MEMBRANE AND PRODUCTION METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane having high durability to an oxidizer and high separation performance to a neutral molecule.SOLUTION: A composite semipermeable membrane comprises a fine porous support membrane and a separation function layer formed on the fine porous support membrane. The separation function layer includes a polymer formed by the condensation of the hydrolyzable group of a compound (A) and the polymerization of the compound (A) with at least one of compounds (B) and (C). At least one of the compounds (B) and (C) has one or more ethylenic unsaturated groups. (A) is a silicon compound having a silicon atom, a reactive group having the ethylenic unsaturated group directly bonded to the silicon atom and the hydrolyzable group directly bonded to the silicon atom. (B) is a compound except the compound (A) and has one or more acidic groups. (C) is a compound except the compound (A) and the compound (B) and has one or more basic groups.