氯化锂为添加剂制得的疏水聚偏氟乙烯不对称微孔膜的形态结构及其膜蒸馏性能  

Morphology and Membrane Distillation Properties of tke PVDF Membranes Prepared with Lithium Chloride as the Additive

作　　者：孔瑛[1] 吴庸烈[1] 杨金荣[1] 徐纪平[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《功能高分子学报》1992年第4期336-341,共6页Journal of Functional Polymers

基　　金：国家自然科学基金

摘　　要：结合膜的形态结构研究了以 LiCl为添加剂制得的疏水 PVDF膜的膜蒸馏性能。与来用水溶液高分子添加剂制得的PVDF微孔膜相比,膜蒸馏性能有了较大提高,尤其具有更高的截留率。制得的微孔膜的蒸馏通量已接近商品膜的膜蒸馏通量,表明以LiCl为添加剂制得的PVDF疏水微孔膜是一种适用于膜蒸馏的较理想的疏水微孔膜。The MD (membrane distillation) characteristics of the microporous hydrophobicPVDF membranes prepared with Lithium Chloride as the additive were investigated inrelation to the morphology of the membranes. Compared with the microporous PVDFmembranes prepared with hydrophilic polymer as the additive, the MD properties ofthe obtained membranes were remarkably enhanced, especialy, with much higher rejec-tion. The MD flux of the obtained membranes approached the level of some commer-cial membranes. The experimental results indicated that the microporous hydrophobicPVDF membrane prepared with Lithium Chloride as the additive was a kind of idealhydrophobic microporous membranes for membrane distillation.

关 键 词：聚偏氟乙烯 微孔膜 膜形态 膜蒸馏 

分 类 号：TQ028.8[化学工程]