采用沉浸相转化法制备聚醚砜分离膜,研究了具有不同溶解度参数的溶剂/非溶剂组合对膜亚层结构与性能的影响.结果表明,溶剂/非溶剂组合是影响聚醚砜分离膜亚层结构性能的关键因素,溶剂与聚醚砜的溶解度参数越接近,即|△δ|越小,越易形成海绵状致密结构,而溶剂与非溶剂的|△δ|越大,相转化时间越短,越容易得到指状的大空腔结构;实验中异丙醇为非溶剂时膜的截留和通量效果较好,这是由于在形成致密膜的同时增加了膜的亲水性的缘故.
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