中文摘要：

以新型的耐高温材料——含酚酞侧基的聚芳醚砜（PES-C）为膜材料,采用浊点滴定法、粘度的测定和凝胶动力学实验考察了乙二醇甲醚对铸膜液体系的相分离曲线、粘度和凝胶速度的影响。并采用相转化法在平板刮膜机上制备了一系列超滤膜,研究了乙二醇甲醚对膜性能和结构的作用规律。结果表明,凝胶前锋位移的平方与时间并不是像前人得出的结论,呈良好的线性关系,而是呈曲线关系,浸入凝胶过程并非单纯受Fick扩散控制。乙二醇甲醚含量增加,使三元体系发生相分离时所需的水量降低,铸膜液粘度增加,凝胶速度下降。乙二醇甲醚浓度增加,膜结构支撑层中指状孔减少,海绵状结构增加,水通量降低,截留率上升。

英文摘要：

Polyethersulfone with Cardo（PES-C）was a developed engineering thermoplastic and membrane material with high glass transition temperature. The effects of ethylene glycol monobutyl ether （EGME） on polymer precipitation curves in the triangle phase diagram, casting solution viscosity and the rate of gelation were studied by the methods of titration, Brookfield viscometer and gelation kinetics experiment. PES-C ultrafiltration membranes were prepared by phase inversion method using DMAC as solvent and EGME as additive. The effects of EGME on performance and structure of membrane were investigated, the experimental results from this work showed that the addition of EGME reduced the solvency of solvent for polymer from phase diagram. The increase of EGME concentration led the increase of casting solution viscosity, got the gelation rate slow down, which inceased sponge structure. The relation between square of gelation front motion （d2） and time （t） was not linear. Solute rejection increased and pure water flux decreased with increasing concentration of EGME.