Preparation and Characterization of Novel Hollow Fiber Composite Membranes
Poly (vinylidene fluoride) (PVDF)/ poly (vinyl chloride) (PVC) /poly (methyl methacrylate) (PMMA) composite membranes were prepared by a dry-wet phase inversion technology using a triple spinneret. Dimethylacetamide (DMAC) and polyvinyl pyrrolidone (PVP) were used as a solvent and an additive, respectively. The membranes were characterized in terms of water flux and solute rejection ratio for the wet membranes. The cross-sectional structures were examined by scanning electron microscopy (SEM). In a conventional dry-wet spinning technology, the outer layer of the extruded polymer solution was exposed to the atmosphere in the air, which can result in relatively dense structure in the outer fiber surface. A modified spinning process using a triple spinneret was developed to overcome the above disadvantage. A fluid with a high amount of solvent was pumped through the outer annulus of the spinneret. The results demonstrated that the hollow fiber composite membranes prepared by this modified process show unchanged separation properties but improved water permeation flux.
composite membranes preparation characterization hollow fiber
Li Yunqing Xi Danli
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China C College of Environmental Science and Engineering, Donghua University, Shanghai 201620, P. R. China
国际会议
上海
英文
555-558
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）