膜科学与技术

化学亚胺化法聚酰亚胺超滤膜的制备以及表征

作者：唐娜¹，²，李彦¹，²，项军¹，²，华欣欣¹，²，程鹏高¹，²，张建平¹，²，王学魁¹，²

单位： 1. 天津科技大学化工与材料学院，天津 300457； 2. 天津市海洋资源与化学重点实验室，天津 300457

关键词：聚酰亚胺；超滤膜；聚乙二醇

出版年,卷(期):页码： 2016,36(6):61-69

摘要：

本文采用湿法相转化法和化学亚胺化法制备得到聚酰亚胺（PI）超滤膜，并通过正交试验考察了制备PI膜的最优化条件。文中首先合成一定分子量的聚酰胺酸（PAA）粉体，以此为原料控制铸膜液配比制备PAA薄膜，在低温下通过化学亚胺化法制得PI超滤膜。文中研究了PAA质量分数对铸膜液粘度、膜结构与性能的影响，结果显示PAA质量分数的增加会导致铸膜液粘度的升高，PI膜通量的下降，截留率的上升。同时，采用正交实验研究了PAA质量分数、PEG质量分数以及PEG分子量这三个因子对膜性能的影响，经过分析最终得出对PI膜的最佳组合为15%PAA、PEG浓度为8%，分子量为2000。

A polyimide (PI) ultrafiltration membrane was successfully fabricated by non-solvent induced phase separation (NIPS) and chemical imidization (CI) in this paper. Firstly the polyamic acid（PAA）membrane was prepared by NIPS, and then the PI membrane was obtained by CI of PAA membrane under low temperature. The effects of PAA dosage on the viscosity of casting solution, the structure and separation performance of membrane were respectively studied. The results showed that the viscosity and rejection rate increased and the flux declined with the increasing PAA concentration. Meanwhile, orthogonal experiment was adopted to study the effects of PAA dosage, PEG dosage and molecular weight on the properties of membranes. The optimal combination was identified as 15% PAA、8% PEG 2000 trough analysis.

第一作者简介:唐娜（1972-），女，辽宁海城市人，博士，教授，博士研究生导师. 主要研究方向：膜分离、海卤水资源综合利用．（tjtangna@tust.edu.cn）通讯作者简介:项军（1980-），男，湖北荆州市人，博士，讲师.主要研究方向：复合膜与膜材料的开发及应用.（jxiang@tust.edu.cn）

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