聚芳硫醚砜分离膜的制备——相图及微观结构
The Preparation of PASS Membrane — Phase Diagram and Morphology
作者：王孝军(四川大学 材料科学技术研究所，四川 成都 610064)；黄恒梅(四川大学 高分子科学与工程学院，四川 成都 610065)；于清泉(四川大学 高分子科学与工程学院，四川 成都 610065)
Author：(Institute of Materials Sci. & Technol., Sichuan Univ., Chengdu 610065, China)；(School of Polymer Sci. & Eng., Sichuan Univ., Chengdu 610065, China)；(School of Polymer Sci. & Eng., Sichuan Univ., Chengdu 610065, China)
收稿日期：2007-12-04 年卷（期）页码：2008,40(5):99-105
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：聚芳硫醚砜; 分离膜; 相图; 微观结构
Key words：polyarylene sulfide sulfone (PASS); membrane; phase diagram; morphology
基金项目：国家高技术研究发展计划资助项目(863) ( 2007AA03Z561 )
中文摘要
聚芳硫醚砜是一种具有优异性能的新型特种工程塑料，可将其制备成在高温和酸碱等苛刻环境下应用的分离膜。通过浊点滴定法测定PASS/溶剂/非溶剂三元相图，并采用沉浸凝胶法制备了聚芳硫醚砜分离膜。实验结果表明各种溶剂对PASS的溶解能力大小顺序为：NMP﹥苯酚+四氯乙烷﹥DMF，各种常用沉淀剂的沉淀能力总体上随羟基数的增加、极性的增大而增强，其从大到小的顺序是：H2O﹥丙三醇﹥乙二醇﹥异丙醇﹥乙醇﹥1,2-丙二醇。所制备的PASS分离膜均具有指状孔结构，通过分析可知这种结构的形成可能是延迟分相所导致的。
英文摘要
Polyarylene sulfide sulfone (PASS) belongs to a new generation of heat resistant engineering thermoplastics and has already been used as an excellent membrane material. The preparation of PASS separation membrane by means of immersion precipitation method (L-S method) and the phase diagram of the PASS/solvent/non solvent system were studied. Solubility order of the solvents to PASS according to ternary phase diagrams is NMP>phenol/tetrachloroethane>DMF. Precipitating ability of non solvent is H2O>glycerine> glycol>isopropanol>grain alcohol>1, 2-propaanediol in order. The prepared membrane has unsymmetrical structure which contains a thin porous layer and a thick support layer with finger like bores. The formation mechanism of the finger like bores is attributed to the delay in the phase separation of the cast solution.
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