| abstract |
A method for making a composite polyamide membrane comprising a porous support and a polyamide layer, including the steps of: i) applying a polar solution including a polyfunctional amine monomer and a non-polar solution including a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a polyamide layer; ii) applying a dihydroxyaryl compound to the polyamide layer, wherein the dihydroxyaryl compound is represented by: formula wherein D, D', D" and D'" are independently selected from: alkyl, alkoxy, hydrogen, halogen, hydroxyl and amine, and L is a linking group; and iii) exposing the thin film polyamide layer to nitrous acid. |