A reverse osmosis composite membrane having an active layer of poly m-styrene amide or poly m-styrene amide / aromatic polyamide

摘要

The present invention provides a reverse osmosis composite membrane comprising a porous support membrane and a crosslinked poly-m-styrene amide active layer formed by interfacial polymerization of a solution prepared by dissolving an aqueous solution of poly-m-aminostyrene and an aromatic acyl halide in an organic solvent do. The present invention also relates to a polymeric porous film support comprising a polymeric porous film support and a solution prepared by mixing an aqueous solution of poly (m-aminostyrene) with an aqueous solution of aromatic amine and a solution prepared by dissolving an aromatic acyl halide in an organic solvent, There is provided a reverse osmosis composite membrane comprising a crosslinked poly-m-styrene amide / aromatic polyamide active layer. The composite membrane provided by the present invention has excellent water permeability and salt exclusion ratio.