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Process for fabricating PBI hollow fiber asymmetric membranes for gas separation and liquid separation

United States Patent

April 26, 2016
View the Complete Patent at the US Patent & Trademark Office
The invention provides methods for preparing an asymmetric hollow fiber, the asymmetric hollow fibers prepared by such methods, and uses of the asymmetric hollow fibers. One method involves passing a polymeric solution through an outer annular orifice of a tube-in-orifice spinneret, passing a bore fluid though an inner tube of the spinneret, dropping the polymeric solution and bore fluid through an atmosphere over a dropping distance, and quenching the polymeric solution and bore fluid in a bath to form an asymmetric hollow fiber.
Jayaweera; Indira (Menlo Park, CA), Krishnan; Gopala N. (Menlo Park, CA), Sanjurjo; Angel (Menlo Park, CA), Jayaweera; Palitha (Menlo Park, CA), Bhamidi; Srinivas (Menlo Park, CA)
14/ 190,100
February 26, 2014
STATEMENT OF GOVERNMENT INTEREST This invention was made with United States Government support under N00014-10-C-0059 awarded by the Office of Naval Research, and under DE-FC26-07NT43090 awarded by the Department of Energy. The United States Government has certain rights in this invention.