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Effect of coagulation bath composition on the structures and properties of PVDF membrane formed by a dual-bath coagulation method

Authors： WANG Lei1，LI Wei1，WANG Xudong 1，MENG Xiaorong2，YUAN Wei1，HUANG Danxi1?

Units： 1.School of Environmental & Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2.School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China

KeyWords： hollow fiber membrane ; PVDF ; dual-bath coagulation method ; compositions of coagulation bath

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2012,32(2):5-9

Abstract：

Polyvinylidene Fluoride (PVDF)/ polyvinylpyrrolidone (PVP) / N,N-dimethylacetamide (DMAc) solutions composite hollow fiber membrane were fabricated by the dual-bath coagulation method, using different content of DMAc / water solution as the first and internal coagulation bath. This study investigated the effect of solvent compositions of coagulation baths on the performance and microstructure of PVDF/PVP membranes. Hollow fiber membranes were characterized in terms of scanning electron microscopy (SEM), pure water flux and Bovine Serum Albumin (BSA) solute rejection performance in this paper. The experimental result indicated that, as DMAc in the coagulations increased, the pores at the top layer significantly increased, while the sub-layer structure varied differently; Pure water flux of the membrane did not present regularity, but the BSA rejection rate remained relatively stable. when the concentration of DMAc solutions in the first and internal coagulant were up to 70 wt.% and 30 wt.%, the macrovoid structure at the sub-layer were large and loose. It was also found that the pure water flux of the PVDF membranes amounted to 548 L•m-2•h-1 and 270 L•m-2•h-1, which showed a good permeability.

Funds：

教育部博士点基金项目-博导类（20096120110010）；国家自然科学基金项目（51008243）；陕西省“13115”科技创新工程重大科技专项（2010ZDKG-56）；陕西省重点实验室项目（2010JS028）；西部建筑科技国家重点实验室（筹）开放研究基金（10KF08）

AuthorIntro：

王磊(1971-)，男，陕西西安人，教授，工学博士，主要从事膜法水处理理论与技术，膜的改性制备等研究。电话：13509182229，E-mail:wl0178@126.com。

Reference：

[1] Wang D L, Li K, Teo W K. Preparation and characterization of polyvinylidene fluoride (PVDF) hollow fiber membranes[J]. J Membr Sci, 1999, 163(2):211-220.
[2] 左丹英，徐卫林，徐又一.溶剂对PVDF铸膜液相转化和微孔膜皮-亚两层结构的不同影响[J].高分子学报，2008，6：522-528.
[3] Van’t Hof J A, Reuver s A J, Boom R M. Preparation of asymmetric gas separation membranes with high selectivity by a dual-bath coagulation method[J]. J Membr Sci, 1992, 70：17-30.
[4] Yang Qianz, Chung Tai-Shung, Santoso Y E. Tailoring pore size and pore size distribution of kidney dialysis hollow fiber membranes via dual-bath coagulation approach[J]. J Membr Sci, 2007, 290(1-2):153-163.
[5] 高春梅，孟彦宾，奚旦立.凝胶条件对PVDF/PVC中空纤维膜性能及结构的影响[J].膜科学与技术，2008，28(2)：38-43.
[6] 李战胜，李恕广，江成璋.浸入凝胶法聚合物膜形成机理的研究现状[J].膜科学与技术，2002，22(2)：29-35.
[7] Wijmans J G, Baaij J P B, Smolders C A. The mechanism of formation microporous or skinned membranes produced by immersion precipitation[J]. J Membr Sci, 1983,14:263-274.

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