| 不同添加剂对聚偏氟乙烯膜结构和性能的影响 |
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| 引用本文： | 李倩,许振良,俞丽芸,袁国林.不同添加剂对聚偏氟乙烯膜结构和性能的影响[J].高分子材料科学与工程,2010(2):80-83. |
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| 作者姓名： | 李倩 许振良 俞丽芸 袁国林 |
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| 作者单位： | 华东理工大学化学工程联合国家重点实验室;华东理工大学化学工程研究所膜科学与工程研发中心; |
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| 基金项目： | 国家“973”重点基础研究发展计划(2003CB615705) |
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| 摘 要： | 利用非溶剂相转化法(NIPS),以N,N-二甲基乙酰胺(DMAc)为溶剂,聚乙烯吡咯烷酮(PVPK30)和一水合氯化锂(LiCl·H2O)为混合添加剂,改变PVPK30-LiCl·H2O配比得到不同性能和结构的聚偏氟乙烯(PVDF)膜。考察了不同种类添加剂(PVP、LiCl·H2O、H2O和PEG200)及不同配比的PVPK30-LiCl·H2O添加剂对PVDF成膜分相延时时间、分相速率的影响。实验结果表明,采用PVPK30为添加剂,铸膜液呈瞬时分相行为,膜通量很大;增大混合添加剂中PVPK30/LiCl·H2O的比例,会增加液液分相速率,使膜结构中的大孔贯通整个膜结构。
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| 关 键 词： | 聚偏氟乙烯 混合添加剂 分相延迟时间 分相速率 |
Effect of Different Additives on Morphology and Properties of Poly(Vinylidene Fluoride) Membrane |
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| LI Qian,XU Zhen-liang,YU Li-yun,YUAN Guo-lin.Effect of Different Additives on Morphology and Properties of Poly(Vinylidene Fluoride) Membrane[J].Polymer Materials Science & Engineering,2010(2):80-83. |
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| Authors: | LI Qian XU Zhen-liang YU Li-yun YUAN Guo-lin |
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| Affiliation: | 1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology (ECUST); 2. Membrane Science and Engineering R&D Laboratory, Chemical Engineering Research Center, ECUST, Shanghai 200237, China) |
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| Abstract: | Porous poly (vinylidene fluoride) (PVDF) membranes were prepared via non-solvent induced phase separation methods (NIPS). Using N,N-dimethylacetamide (DMAc) as a solvent, the effects of polyvinylpyrrolidone (PVPK30)-lithium chloride (LiCl·H2O) mixed additives on PVDF membrane morphology and properties were investigated. The effect of different additives (PVP, LiCl·H2O, H2O, PEG200 and PVPK30-LiCl·H2O) on the demixing delay-time and demixing rate of PVDF membranes were studied. The experimental results illustrate that using PVPK30 an instantaneous demixing and high flux membrane is obtained. More PVPK30 in PVPK30-LiCl·H2O mixed additives can accelerate the rate of liquid-liquid demixing. Therefore, the macroporous structure is developed completely. |
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| Keywords: | PVDF mixed additives demixing delay-time demixing rate |
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