MANUFACTURING METHOD FOR POLYAMIDE-BASED REVERSE OSMOSIS MEMBRANE

摘要

The present invention relates to a reverse osmosis membrane manufacturing method. The method includes the steps of: manufacturing a reverse osmosis membrane support using a dope solution including an acetylated-methyl cellulose (AMC) polymer and a solvent and initiating the interfacial polymerization of the polyfunctional amine and a polyfunctional acyl halide from the surface of the reverse osmosis membrane to form an polyamide active layer. The present invention can use the high-hydrophilicity acetylated cellulose to easily impregnate the support in the amine solution, and increases the salt rejection and flow rates compared to a conventional membrane, thereby manufacturing the high-performance and economical polyamide reverse osmosis membrane.