干燥方式对相转化法制备PVDF微孔膜性能的影响  

Effect of drying method on properties of PVDF microporous membrane via phase inversion process

作　　者：操建华[1] 李继定[1] 鲁胜[1] 林阳政[1] 陈翠仙[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《天津工业大学学报》2008年第4期16-18,共3页Journal of Tiangong University

基　　金：博士后科学基金(023203055);国家973项目(2003CB615701);国家自然科学基金项目(20576059;20676067;20736003);中石化科技开发研究基金(X505002);中石油风险创新基金(05051143)

摘　　要：采用相转化法制备了PVDF微孔膜,研究了50℃干燥(a)、无水乙醇中浸泡后室温干燥(b)、无水乙醇和正己烷中置换后室温干燥(c)3种干燥方式对最终PVDF膜结构和性能的影响.采用扫描电子显微镜观察PVDF膜的形态结构,测定膜的纯水通量和截留率.结果发现:不同干燥方式对膜结构的影响不大,3种干燥方式得到的PVDF膜水通量顺序为Jc>Jb>Ja.The poly （vinylidene fluoride） microporous membrane was prepared by phase transition method. The effect of three different drying methods such as, 50 ℃ drying （a）, ethanol exchange then room temperature drying（b）, ethanol exchange and hexane exchange then room temperature drying （c） on the properties of PVDF membrane was investigated. The morphology of PVDF membrane was observed with scanning electron microphotograph （SEM）. The pure water flux and rejection of PVDF membrane were measured. The results show that there is little influence on the structure of PVDF membrane. However, the pure water flux of three PVDF membranes are varied with the sequence of Jc〉Jb〉Ja.

关 键 词：聚偏氟乙烯 相转化法 微孔膜 干燥方式 

分 类 号：TS102.528.1[轻工技术与工程—纺织工程] TQ028.8[轻工技术与工程—纺织科学与工程]