添加剂对PPBES中空纤维超滤膜结构和性能的影响-中国材料进展

文章信息/Info

Title:: Effect of Additives on Structure and Performance of PPBES Hollow Fiber Ultrafiltration Membranes

作者:: 张守海; 王雨田; 杨大令; 蹇锡高; (大连理工大学化工学院辽宁省高性能树脂工程技术研究中心辽宁省高分子科学与工程重点实验室,辽宁大连 116024)

Author(s):: ZHANG Shouhai; WANG Yutian; YANG Daling; JIAN Xigao; (Liaoning Key Laboratory of Polymer Science and Engineering, Liaoning High Performance Polymer ，Engineering Research Center, College of Chemical Engineering, Dalian University of Technology, Dalian 116024, China)

摘要:: 以杂萘联苯共聚醚砜为膜材料，N，N-二甲基乙酰胺作为制膜溶剂，采用干-湿纺丝工艺制备中空纤维超滤膜，分别考察不同添加剂对膜结构和性能的影响。结果表明，以聚乙烯吡咯烷酮作为添加剂时，随着添加剂含量的增加，膜的水通量逐渐下降，而截留率变化不大；以丁酮、丙酸以及丙醇作为添加剂时，随着添加剂含量的增加，膜的水通量和截留率的变化趋势不尽一致，膜的断面结构基本上是由指状孔结构向海绵状孔结构转变，但也各有差别。从添加剂和溶剂的分子与分子链的相互作用的行为及体系动力学和热力学状态的变化，对膜结构和性能的影响作了分析和解释。

Abstract:: The hollow fiber ultrafiltration membranes were prepared successfully from copoly (phthalazinone ether sulfone) with drywet spinning process. The effects of different additives on structure and performance of UF membrane were investigated. The results showed that with the increasing of polyvinylpyrrolidone content, the flux decreased gradually and the rejection changed little. With the increasing of nonsolvent additives such as Butanone, Propionic acid and Propanol, the flux increased while the rejection decreased. It is found that the increasing of additive content could lead to the change of membrane structure from finger to sponge.