Patent ID: 7598296
Filing Date: 2009-10-06
Classification: B01D,Y02A

Abstract:
1. A preparation method of a polyamide thin film composite (TFC) reverse osmosis membrane using interfacial polymerization of an amine aqueous solution and amine-reactive compound, the preparation method comprising the steps of: (a) forming a polyamide active layer through interfacial polymerization by contacting a surface of a porous support with the amine aqueous solution containing a polyfunctional aromatic amine monomer and an organic solution containing polyfunctional acyl halide monomer as an amine-reactive compound; and (b) performing post-treatment preceded by formation of the polyamide active layer by contacting the polyamide active layer with an aqueous solution containing 0.1 to 100 wt % of polyfunctional tertiary alcohol amine comprising at least two tertiary amines having substituted alcohol group on the hydrocarbon side chains.