| 凝胶浴组成对聚偏氟乙烯膜结构性能的影响 |
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| 引用本文： | 叶茜,许美兰,廖文超,李漂阳,肖金华.凝胶浴组成对聚偏氟乙烯膜结构性能的影响[J].鹭江职业大学学报,2012(4):74-78. |
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| 作者姓名： | 叶茜 许美兰 廖文超 李漂阳 肖金华 |
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| 作者单位： | [1]厦门理工学院环境工程系,福建厦门361024 [2]厦门市膜技术研发与应用重点实验室,福建厦门361024 |
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| 基金项目： | 福建省自然科学基金项目（2011J05141）;厦门市科技计划项目（3502Z20113034）;厦门理工学院高层次人才科技项目（YKJ10032R） |
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| 摘 要： | 以聚偏氟乙烯为膜材料,二甲基亚砜为溶剂,通过相转化法制备不对称结构的聚偏氟乙烯微孔膜.考察不同凝胶浴组成浓度对膜结构和性能的影响.结果表明,二甲基亚砜容纳非溶剂水的能力非常弱.以二甲基亚砜为溶剂时,所成膜均为指状孔和球晶共存的结构.凝胶浴的组成将影响成膜机理,随着凝胶浴浓度的不断增大,凝胶分相延迟发生,指状孔的尺寸也随之增大,因此成膜孔隙率和水通量都逐渐升高.当凝胶浴为60%DMSO时,所成膜的孔隙率为78%,水通量达到623 L/m2h.
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| 关 键 词： | 聚偏氟乙烯 膜 二甲基亚砜 凝胶浴组成 |
Effects of Different Bath Content on Structures and Performances of PVDF Membranes |
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| YE Qian,XU Mei-lan,LIAO Wen-chao,LI Piao-yang,XIAO Jin-hua.Effects of Different Bath Content on Structures and Performances of PVDF Membranes[J].Journal of Lujiang University,2012(4):74-78. |
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| Authors: | YE Qian XU Mei-lan LIAO Wen-chao LI Piao-yang XIAO Jin-hua |
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| Institution: | 1.Faculty of Environmental Engineering,Xiamen University of Technology,Xiamen 361024,China; 2.Xiamen Key Laboratory of Membrane Research and Application,Xiamen 361024,China) |
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| Abstract: | Asymmetric poly（vinylidene fluoride）（PVDF） membranes were prepared by immersion precipitation in the H2O/ dimethylsulfoxide（DMSO） / PVDF system.The effects of different bath content on structures and performances of PVDF membranes were investigated.By using DMSO as solvent,the cast membrane exhibited a large number of short finger-like cavities and globules.It was found that the DMSO in the bath hindered the phase-separation kinetics.The size of finger-like cavities increased with the increase of dimethylsulfoxide in the bath.As a result,the porosity and pure water flux of PVDF membranes also increased.With the bath content of 60% DMSO,the porosity of resulting membrane was 78%,and pure water flux was up to 623 L/m2h. |
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| Keywords: | poly（vinylidene fluoride） membrane dimethylsulfoxide bath content |
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