非溶剂添加剂对聚醚砜酮中空纤维纳滤膜结构和性能的影响  

Effect of nonsolvent additives on structure and performance of poly(phthalazinone ether sulfone ketone) hollow fiber nanofiltration membranes

作　　者：杨永强[1] 杨大令[1] 张守海[1] 邱芳[1] 蹇锡高[1] 

机构地区：[1]大连理工大学高分子材料系,辽宁大连116012

出　　处：《现代化工》2005年第12期43-47,共5页Modern Chemical Industry

基　　金：国家"863"高技术研究发展计划项目(2003AA33G030);国家"973"基础研究发展计划项目(2003CB615704)

摘　　要：以新型杂萘联苯聚醚砜酮(PPESK)为膜材料,N-甲基-2-吡咯烷酮(NMP)为溶剂,乙二醇甲醚(EGME)、冰醋酸(AA)以及AA/EGME作为复合添加剂,采用干-湿相转化技术制备了中空纤维非对称纳滤膜,重点考察了非溶剂添加剂对中空纤维膜结构和性能的影响。结果表明非溶剂添加剂的加入导致了中空纤维膜孔结构由指状转变为海绵状,从而引起中空纤维膜性能的变化。当聚合物质量分数为23%,铸膜液溶剂体系为m(AA)∶m(EGME)∶m(NMP)=5.7∶16.5∶54.8时,中空纤维膜对PEG600的截留率高于96%,纯水通量为211 L/(m2.h)。The hollow fiber nanofiltration membranes were prepared successfully from poly（ phthalazinone ether sulfone ketone） with a dry/wet phase inversion technique. Ethylene glycol methyl ether and acetic acid were used as nonsolvent additives and N-methyl-2-pyrrolidone was used as solvent in the membrane preparation. The effects of the concentration of ethylene glycol methyl ether and acetic acid in casting solution on the structure and performance of PPESK hollow fiber membranes were investigated respectively. The structure of PPESK hollow fiber membranes including cross-section and external surface was studied by scanning electron microscopy. It is found that the membrane performance is consistent and agrees with the membrane structure. It is also concluded that using the combination of ethylene glycol methyl ether and acetic acid as additive can improve the permeation flux and the solute rejection by changing the membrane morphology from finger-llke shape to sponge-like structure and the separation performance of nanofiltration membrane shows that the pure water flux is 211 L/（ m^2· h） and PEG 600 rejection is above 96% ,respectively.

关 键 词：聚醚砜酮 中空纤维 纳滤 添加剂 结构 性能 

分 类 号：TQ028[化学工程]