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.
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.