中空纤维膜

Abstract(#br)Hollow fiber membranes were prepared from TEGMC ( T ri E thylene G lycol M onoesterified C rosslinkable) 6FDA-DAM:DABA (3:2) polyimide and shown to retain their stability and permselectivity under aggressive sour gas feed conditions. The H 2 S/CH 4 and CO 2 /CH 4 permselectivities of these cross-linked fibers exceeded those of dense-film membranes, which is attributed to polymer-chain alignment induced during the spinning process.

Abstract(#br)This report demonstrates the fabrication of a composite hollow fiber membrane that efficiently recovers dissolved methane (dCH 4 ) from anaerobic wastewater treatment effluents via membrane contactor (MC) process. We first fabricated highly porous hollow fiber membranes (∼85% porosity) using polyvinylidene difluoride (PVDF). Then, we coated the whole structure (bulk), or lumen side of PVDF supports with polydimethylsiloxane (PDMS), a hydrophobic polymer possessing high gas permeability.