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Semipermeable polymers and method for producing same

United States Patent

8,147,735
April 3, 2012
View the Complete Patent at the US Patent & Trademark Office
A polyamide membrane comprising reaction product of an anhydrous solution comprising an anhydrous solvent, at least one polyfunctional secondary amine and a pre-polymer deposition catalyst; and an anhydrous, organic solvent solution comprising a polyfunctional aromatic amine-reactive reactant comprising one ring. A composite semipermeable membrane comprising the polyamide membrane on a porous support. A method of making a composite semipermeable membrane by coating a porous support with an anhydrous solution comprising an anhydrous solvent, a polyfunctional secondary amine and a pre-polymer deposition catalyst, to form an activated pre-polymer layer on the porous support and contacting the activated pre-polymer layer with an anhydrous, organic solvent solution comprising a polyfunctional amine-reactive reactant to interfacially condense the amine-reactive reactant with the polyfunctional secondary amine, thereby forming a cross-linked, interfacial polyamide layer on the porous support. A method of impregnating a composite semipermeable membrane with nanoparticles selected from heavy metals and/or oxides of heavy metals.
Buschmann; Wayne E. (Boulder, CO)
Eltron Research & Development, Inc. (Boulder, CO)
12/ 170,036
July 9, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under U.S. Army SBIR contract numbers DAAD19-02-0029 and DAAD19-03-C-0041; and Department of Energy SBIR contract numbers DE-FG02-05ER84228 and DE-FG02-05ER84230. The United States government has certain rights in the invention.