Chemical Additives for Improving Membrane Water Flow Rate {CHEMICAL ADDITIVES FOR ENHANCEMENT OF WATER FLUX OF A MEMBRANE}

摘要

Due to nanofiltration, forward osmosis or reverse osmosis, an interfacial polymerization process is provided for producing highly permeable thin film composite membranes which are used for brackish water, especially at low energy conditions. The process was carried out by contacting the porous support membrane with an aqueous phase containing a flow enhancing combination of a polyamine and a bidentate ligand and a metal chelate additive containing metal atoms or metal ions and an additive including phosphoramide A step of forming a support film and a step of applying an organic phase containing a polyfunctional acid halide to the coated support film and interfacially polymerizing the polyamine and the polyfunctional acid halide to form a distinctive layer of the thin film composite film including. Also provided are a membrane made by the above method and a reverse osmosis module containing the membrane.