Fabrication of a Novel Porous Poly(Vinylidene Fluoride) Blend Five-Bore Membrane for Wastewater Treatment  

作　　者：黄健平 马春燕 奚旦立 阎克路 

机构地区：[1]College of Chemistry,Chemical Engineering and Biotechnology,Donghua University [2]School of Environmental Science and Engineering,Donghua University [3]Department of Environmental Engineering and Municipal Engineering,North China University of Water Resources and Electric Power

出　　处：《Journal of Shanghai Jiaotong university(Science)》2012年第6期701-705,共5页上海交通大学学报（英文版）

基　　金：the China Postdoctoral Science Foundation (No.20110490645);the Science Foundation of Shanghai(No.11ZR1400800)

摘　　要：Porous poly(vinylidene fluoride)(PVDF)/poly(methyl methacrylate)(PMMA) blend five-bore hollow fiber membranes are prepared by wet phase inversion methods.In spinning these PVDF hollow fibers, N,N-dimethylacetamide(DMAc) and polyvinyl pyrrolidone(PVP) are used as the solvent and the non-solvent additive,respectively.The external coagulant uses water.The internal coagulants use water and DMAc-water solutions.The membranes are characterized in terms of water flux and molecular weight cut-off for the wet membranes.The cross-sectional structures are examined by scanning electron microscopy(SEM).The effects of polymer concentration and the internal coagulant on the permeation properties and membrane structures are examined keeping the bore liquid flow and air-gap constants.Relative high flux,rejection and strengh PVDF five-bore hollow fiber membranes could be prepared from the polymer concentration in dope solution at 17%of mass fraction,the air gap distance of 14 cm,and using 10%of mass fraction of DMAc solution as the internal coagulant at 13 mL/min of flow.Porous poly（vinylidene fluoride） （PVDF）/poly（methyl methacrylate） （PMMA） blend five-bore hol- low fiber membranes are prepared by wet phase inversion methods. In spinning these PVDF hollow fibers, N, N-dimethylacetamide （DMAc） and polyvinyl pyrrolidone （PVP） are used as the solvent and the non-solvent additive, respectively. The external coagulant uses water. The internal coagulants use water and DMAc-water solutions. The membranes are characterized in terms of water flux and molecular weight cut-off for the wet membranes. The cross-sectional structures are examined by scanning electron microscopy （SEM）. The effects of polymer concentration and the internal coagulant on the permeation properties and membrane structures are examined keeping the bore liquid flow and air-gap constants. Relative high flux, rejection and strengh PVDF five-bore hollow fiber membranes could be prepared from the polymer concentration in dope solution at 17% of mass fraction, the air gap distance of 14cm, and using 10% of mass fraction of DMAc solution as the internal coagulant at 13 mL/min of flow.

关 键 词：porous poly（vinylidene fluoride） （PVDF）/poly（methyl methacrylate） （PMMA） five-bore hollow fibermembrane condition of spinning process 

分 类 号：TQ028.8[化学工程]