Effect of PEG additives on properties and morphologies of polyetherimide membranes prepared by phase inversion  

作　　者：Jian CHEN Jiding LI Xia ZHAN Xiaolong HAN Cuixian CHEN 

机构地区：[1]Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Chemical Science and Engineering》2010年第3期300-306,共7页化学科学与工程前沿（英文版）

基　　金：the financial support of the Major State Basic Research Program of China(2009CB623404);the National Natural Science Foundation of China(Grants No.20736003 and 20906056);the National High Technology Research and Development Program of China(2007AA06Z317,2008EG111021);the Foundation of Ministry of Education of China(20070003130);the Foundation of the State Key Laboratory of Chemical Engineering(SKL-ChE-08A01);the Postdoctor Science Foundation of China(023201069).

摘　　要：This study investigated the effect of poly(ethylene glycol)(PEG)additive as a pore-former on the structure formation of membranes and their permeation properties connected with the changes in thermodynamic and kinetic properties in the phase inversion process.The membranes were prepared by using polyetherimide/Nmethyl-2-pyrrolidone/PEG(PEI/NMP/PEG)casting solution and water coagulant.The resulting membranes,prepared by changing the ratio of PEG to PEI,were characterized by scanning electron microscope(SEM)observations,measurements of water flux andγ-globin rejection.The thermodynamic and kinetic properties of the membrane-forming system were studied through viscosity.The pore radius distribution curves were especially obtained by differential scanning calorimetry(DSC).Furthermore,the membranes were characterized for pure water flux and rejection of solute and by SEM observation.The filtration results agreed well with the SEM observations.As expected,PEG with a fixed molecular weight(PEG 600)acted as a pore forming agent,and membrane porosity increased as the PEG content of the casting solution increased.

关 键 词：phase inversion POLYETHERIMIDE poly(ethylene glycol) ADDITIVE 

分 类 号：O63[理学—高分子化学]