用于膜蒸馏的疏水聚偏氟乙烯不对称微孔膜的制备及其形态结构的研究  

PREPARATION OF THE ASYMMETRIC MICROPOROUS HYDROPHOBIC PVDE MEMBRANES FOR MEMBRANE DISTILLATION AND THE INVESTIGATION OF MORPHOLOGY OF THE MEMBRANES

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

出　　处：《膜科学与技术》1990年第3期19-26,共8页Membrane Science and Technology

基　　金：国家自然科学基金

摘　　要：利用相转换法以无机盐Li C1为添加剂制备了用于膜蒸馏的疏水聚偏氧乙烯不对称微孔膜。研究了铸膜液组成,特别是添加剂LiC1对膜形态结构的影响。以LiC1为添加剂制得的膜兼有指状孔结构和海绵状孔结构。与一般情况不同,所得膜的孔径控制层为下表层及靠近下表层的海绵状结构而不是上表层。The asymmetric microporous hydrophnbic PVDF membranes for membrane distillation were prepared by phase-inversion process with Lithium chloride as the additives.The effects of composition of casting solution,especially Lithium Chloride content,on morphology of the membranes were investigated.The PVDF membranes prepared with Lith-ium Chloride as the additives were characterized by both finger-typestructure and sponge-type structure.In contrast to the structure of co-mmon asymmetric membranes, the active layer of the PVDF membra-nes is the bottom surface and the sponge-type structure near the bot-tom surface instead of the top surface of membrane.

关 键 词：聚偏氟乙烯 微孔膜 膜蒸馏 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]