聚偏氟乙烯平板膜制备及亲水性改性  

Preparation and Hydrophilic Modification of Polyvinylidene Fluoride Flat Sheet Membrane

作　　者：沈伟坚[1] 钱建华[1] 

机构地区：[1]浙江理工大学材料与纺织学院,杭州310018

出　　处：《现代纺织技术》2015年第5期30-35,共6页Advanced Textile Technology

基　　金：浙江理工大学纺织科学与工程优秀青年人才基金(2013YXQN09)

摘　　要：采用聚偏氟乙烯(PVDF)粉末为原料、二甲基乙酰胺(DMAc)为溶剂,聚乙烯吡咯烷酮(PVP)、氯化锂(LiCl)、聚乙二醇(PEG)为改性添加剂制备聚偏氟乙烯(PVDF)平板膜,通过测试其水通量、接触角、截留率等各项性能指标,并拍摄电镜图片来表征膜的表面和截面结构。试验结果表明,PVDF的浓度对亲水性改性影响较小,添加剂LiCl能增大膜的水通量,但不能改善膜的亲水性。添加剂PEG能较好改善PVDF膜的亲水性,增加膜的水通量,PEG质量分数在6%时,亲水性改善较好,因此PEG是好的改性剂。polyvinylidene fluoride（PVDF）flat sheet membrane was prepared by using PVDF powder as raw material,dimethylacetamide（DMAc）as the solvent,polyvinyl pyrrolidone（PVP）,lithium chloride（LiCl）and polyethylene glycol（PEG）as modified additives.Water flux,contact angle and retention rate of PVDF flat sheet membrane were tested.Besides,SEM photographs were taken to characterize surface and cross-section structures of the membrane.The results show that PVDF concentration has smaller impacts on the hydrophilic modification;LiCl can increase the water flux of the membrane,but can not improve the hydrophilia of the membrane.PEG can well improve the hydrophilia of PVDF membranes and increase the water flux of the membrane.When the concentration of PEG is6%,the hydrophilic improvement is better,so PEG is a good modifier.

关 键 词：PVDF 聚偏氟乙烯膜 接触角 水通量 截留率 

分 类 号：TQ028.8[化学工程]