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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of PVDF Hollow-Fiber Membranes via Immersion Precipitation
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Preparation of PVDF Hollow-Fiber Membranes via Immersion Precipitation

机译：浸没沉淀法制备PVDF中空纤维膜

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摘要

Porous polyvinylidene fluoride (PVDF) hollow-fiber membranes with high porosity were fabricated using the immersion precipitation method. Dimethylacetamide (DMAc) and N-methyl-2-pyrrolidone (NMP) were used as solvent, respectively. In addition, polyvinylpyrrolidone (PVP), lithium chloride, and organic acids were employed as nonsolvent additives. The effects of the internal and external coagulation mediums on the resulting membrane properties were also investigated. The resulting hollow-fiber membranes were characterized in terms of maximum pore radius, mean pore radius, effective surface porosity as well as wetting pressure. The structures of the prepared hollow fibers were examined using a scanning electron microscope.
机译：采用浸没沉淀法制备了具有高孔隙率的多孔聚偏二氟乙烯（PVDF）中空纤维膜。二甲基乙酰胺（DMAc）和N-甲基-2-吡咯烷酮（NMP）分别用作溶剂。另外，聚乙烯吡咯烷酮（PVP），氯化锂和有机酸被用作非溶剂添加剂。还研究了内部和外部凝血介质对所得膜性能的影响。所得的中空纤维膜的特征在于最大孔径，平均孔径，有效表面孔隙率以及润湿压力。使用扫描电子显微镜检查制备的中空纤维的结构。

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