| 添加剂对PVDF平板超滤膜性能和结构的影响 |
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| 引用本文： | 王旭东,满丽,王磊,张立卿,孙婷.添加剂对PVDF平板超滤膜性能和结构的影响[J].水处理技术,2010,36(3). |
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| 作者姓名： | 王旭东 满丽 王磊 张立卿 孙婷 |
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| 作者单位： | 西安建筑科技大学环境与市政工程学院,陕西,西安710055 |
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| 基金项目： | 国家基础研究发展计划(973)前期研究专项，国家科技部水体污染控制与治理科技重大专项 (2009ZX07212-002-004):陕西省自然科学基金项目，西安建筑科技大学青年科技基金项目 |
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| 摘 要： | 分别以无水氯化锂(LiCl),磷酸(H_3PO_4)为添加剂,采用正交试验设计方法优化PVDF平板超滤膜制备条件.以去离子水为凝胶浴,考察了聚合物浓度、溶剂种类、添加剂含量对超滤膜平均孔径,孔隙率等膜结构特征殁膜纯水通量、BSA截留率的影响.结果表明,对于LiCl体系,影响膜孔隙率的制膜条件是:LiCl浓度>溶剂种类>PVDF浓度,制膜液组成为12% PVDF/DMAC/5%LiCl时孔隙率最高,达到86.42%;对于H_3PO_4体系,影响膜孔隙率的制膜条件是:溶剂种类>H_3PO_4浓度>PVDF浓度,制膜液组成为15%PVDF/NMP/5%H_3PO_4时孔隙率最高,达到85.86%;对于LiCl和H_3PO_4体系,影响膜孔径的因素均为:PVDF浓度>溶剂种类>添加剂浓度,最大孔径下的最佳制膜液组成为12%PVDF/NMP/3%添加剂.研究得出LiCl体系和H_3PO_4体系的最佳组合分别为18PVDF/NMP/3%LiCl和15%PVDF/NMP/5%H_3PO_4.
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| 关 键 词： | 超滤 膜 添加剂 膜性能 正交设计 |
EFFECT OF ADDITIVES ON THE PROPERTIES AND STRUCTURES OF POLYVINYLIDENE FLUORIDE (PVDF) FLAT ULTRAFILTRATION MEMBRANES |
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| Wang Xudong,Man Li,Wang Lei,Zhang Liqing,Sun Ting.EFFECT OF ADDITIVES ON THE PROPERTIES AND STRUCTURES OF POLYVINYLIDENE FLUORIDE (PVDF) FLAT ULTRAFILTRATION MEMBRANES[J].Technology of Water Treatment,2010,36(3). |
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| Authors: | Wang Xudong Man Li Wang Lei Zhang Liqing Sun Ting |
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| Affiliation: | Wang Xudong,Man Li,Wang Lei,Zhang Liqing,Sun Ting (School of Environmental , Municipal Engineering,Xi\' an University of Architecture , Technology,Xi\'an 710055,China ) |
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| Abstract: | Polyvinylidene fluoride(PVDF) flat UF membranes were prepared and optimized by orthogonal experimental design methods with anhydrous LiCl and H3PO4 as additives,respectively. Deionized water was used as coagulant bath,and the effects of PVDF concentration,the solvent species,the additive content on such properties of membrane structure as the mean poresize of UF membrane,porosity,and on membrane pure water flux and BSA rejection were investigated.The results showed that as to LiCl additive,LiCl concentratio... |
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| Keywords: | PVDF polyvinylidene fluoride ultrafiltration membrane additive membrane properties orthogonal design |
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