Post Treatment Process of Polyamide Reverse Osmosis Membrane

摘要

The present invention relates to a post-treatment process of a polyamide reverse osmosis membrane used for precision filtration or water purification, and is intended to improve the amount of purified water, in particular, compared to existing products.;The present invention is to prepare a polyamide reverse osmosis composite membrane obtained by immersing a mixture of a polyfunctional amine aqueous solution on the surface of a non-porous substrate coated with a microporous polysulfone and removing the water layer on the surface, and then interfacial polymerization under a polyfunctional acid halide compound solution. In performing the post-treatment process, the unreacted amine monomer, acyl halide monomer, etc. deposited on the surface layer formed in the coating process are washed off and then treated with pure water containing sodium hypochloride. Polyamide-based reverse osmosis membrane prepared through the same post-treatment process shows a significantly improved performance compared to conventional products.