Studies on a Novel Polyamide Composite Nanofiltration Membrane —— I. The Preparation of the Composite Nanofiltration Membrane by Interface Condensation and Its Structure

A novel polyamide composite nanofiltration membrane was prepared by using a new method of interfacial polymerization. The effects of the concentrations of monomers, kinds of monomers, base, and emulsifier on the structure and performance of the nanofiltration membrane were systematically investigated. This composite nanofiltration membrane has good performance that the rejections of PEG600 and Na 2SO 4 are more than 90% and 95% respectively, and the pure water permeability is 45 L/(m 2·h) at 0.6 MPa. And the morphologies of this nanofiltration membrane prepared in this paper are discussed on the basis of contact angle instrument and atomic force microscope.