Fabrication of Dual-layer Matrimid (R)/PSf Hollow Fiber Membrane and Its Gas Separation Performance

Dual-layer matrimid (r)/psf hollow fiber membranes for gas separation were fabricated via co-extrusion technology. the holow fiber memebranes have an ultrathin dense-selective layer of 0.21 mu m. the hollow fiber membranes have a co2 permeance of 46.29 gpu with a co2/ch4 selectivity coefficient of 51.39 at 25 degrees c and 0.5 mpa. and the hollow fiber membranes have an o-2 permeance rate of 6.38 gpu with an o-2/n-2 selectivity coefficient of 7.13 at 25 degrees c and 0.5 mpa. the effects of the test temperature and the feed pressure on the gas separation performance were investigated. finally, the aging phenomena were investigated.