Composite polyamide membrane

摘要

A method for making a composite polyamide membrane comprising the steps of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is includes at least one of the following steps: i) conducting the interfacial polymerization in the presence of a C2-C20 aliphatic monomer comprising at least one carboxylic acid functional group or salt thereof, and a single amine-reactive functional group; and ii) applying a C2-C20 aliphatic monomer comprising at least one carboxylic acid functional group or salt thereof, and a single amine-reactive functional group to the thin film polyamide layer. Many additional embodiments are described including applications for such membranes.

主权项

1. A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method comprises the step of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by including at least one of the following steps:
i) conducting the interfacial polymerization in the presence of a C2-C20 aliphatic monomer that comprises at least one carboxylic acid functional group or salt thereof and a single amine-reactive functional group selected from: acyl halide, anhydride, isocyanate and epoxy; and ii) applying a C2-C20 aliphatic monomer that comprises at least one carboxylic acid functional group or salt thereof and a single amine-reactive functional group selected from: acyl halide, anhydride, isocyanate and epoxy, to the thin film polyamide layer.