凝固浴温度对相转化聚醚砜中空纤维膜结构与性能的影响  

Effects of coagulation bath temperature on the structure and performance of polyethersulfone hollow-fiber membranes by dry/wet process

作　　者：吕少丽[1] 朱宝库[1] 徐又一[1] 

机构地区：[1]浙江大学高分子科学研究所,浙江杭州310027

出　　处：《膜科学与技术》2006年第5期26-30,41,共6页Membrane Science and Technology

基　　金："973"资助项目(2003.CB615705)

摘　　要：以聚醚砜为膜材料、N,N-二甲基乙酰胺为溶剂、PVP为添加剂配成稳定溶液,使用水为凝固浴,采用干／湿法溶液相转化制备聚醚砜中空纤维膜．研究了凝固浴温度及空气间隙距离对膜的表面孔结构、断面结构和其它性能的影响．发现升高凝固浴温度的同时,增大空气间隙,可以有效地增大膜外表面的孔径,膜断面近外皮层下结构由指状孔向海绵状孔转化．Polyethersulfone hollow- fiber membranes were prepared from PES/I）MAc/PVP systems by dry/wet phase inversion process using water as coagulation bath. The effects of coagulation bath temperature and air gap distance on the outer surface structure, cross section structure and water flux of membranes were discussed. With increasing the temperature of coagulation bath and the air gap distance, the size of the pores at the outer surface effectively increased, while the finger- like structure under the outer surface changed to a sponge-like structure.

关 键 词：聚醚砜 中空纤维膜 凝固浴温度 

分 类 号：TB383.2[一般工业技术—材料科学与工程]