Hollow Fiber Microfiltration Membranes from Poly (ether ether ketone) (PEEK)

摘要

A procedure for obtaining high performance large internal diameter (ID; >1 mm) hollow fiber microfiltration membranes from poly (ether ether ketone) (PEEK) is presented. A simple mixture of isomers of diphenylphthalate is a good solvent for employing the thermal-phase inversion process to obtain PEEK memranes. Obtaining large ID hollow fibers with substantial transmembrane flux requires sufficient melt strength during spinning to prevent excessive draw of the extruding fiber. The use of a second leachable polymer to the blend satisfies the conditions, and polysulphone (PS) is found to provide superior membranes relative to either poly (etherimide) (PEI) or poly (ether sulphone) (PES) as a second polymer. PEEK membranes obtianed by this process yield better chemical resistance to a concentrated warm surfactant/oil solution.