Surface Modification of Poly(vinylidene fluoride) Microporous Membrane by Corona-induced Graft Copolymerization

摘要

Poly(vinylidene fluoride) (PVDF) has been widely studied as membrane materials in the separation technology. Because of their excellent chemical resistance, mechanical property, thermal property and well-controlled porosity, PVDF can function as a great material of microfiltration (MF) and ultra-filtration (UF). However, exposure of traditional hydrophobic polymer membranes to protein and other biomacromolecular-containing solutions during filtration can readily result in the fouling of the membranes. At the same time, the flow rate, the separating property and the operational life span of membranes are decreased during membrane fouling. Thus, an ideal membrane can bear the excellent bulk properties of a hydrophobic material and the nonfouling surface characteristics of a hydrophilic substance.