The effect of membrane formation parameters on performance of polyimide membranes for organic solvent nanofiltration (OSN): Part A. Effect of polymer/solvent/non-solvent system choice
The effect of membrane formation parameters on performance of polyimide membranes for organic solvent nanofiltration (OSN): Part A. Effect of polymer/solvent/non-solvent system choice
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DOI：
10.1016/j.memsci.2011.07.027
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发表时间：
2011-09-30
影响因子：
9.5
通讯作者：
Livingston, Andrew
中科院分区：
文献类型：
--
作者：
Soroko, Iwona;Lopes, Mafalda Pessoa;Livingston, Andrew
采用相转化法制备了适用于有机溶剂纳滤（OSN）的整体蒙皮不对称交联聚酰亚胺（PI）纳滤膜。为了更好地了解膜的形成参数（如涂料溶液的组成、蒸发步骤和聚合物的化学性质）如何影响膜的性能（通量和截除率），我们进行了研究。研究结果分为三个部分。在本文中。研究的第一部分，研究了聚酰亚胺和溶剂体系选择的重要性。与P84和HT P84制备的膜相比，Ultem 1000和Matrimid 5218制备的膜更加开放。增加1,4-二氧六环作为助溶剂的比例并没有提高由Ultem 1000和Matrimid 5218制备的膜的截留率。介绍了一种基于相互溶解度参数的简单工具，可以定性地预测聚酰亚胺的选择和涂料溶液中使用的溶剂组成对膜性能的影响。引入的总溶解度参数值越小，截留率越低。(C) 2011 Elsevier B.V.版权所有
Integrally skinned asymmetric crosslinked polyimide (PI) nanofiltration membranes suitable for organic solvent nanofiltration (OSN) were formed via the phase inversion method. A better understanding of how membrane formation parameters (such as composition of the dope solution, the evaporation step, and chemical properties of the polymer) affect membrane performance (flux and rejection) was sought. The findings were reported in three parts. In this paper. Part A of the study, the importance of the choice of polyimide and solvent system was studied. Membranes prepared from Ultem 1000 and Matrimid 5218 were much more open as compared to membranes prepared from P84 and HT P84. Increasing share of 1,4-dioxane used as a co-solvent did not improve rejection of membranes prepared from Ultem 1000 and Matrimid 5218. An introduction of a simple tool based on mutual solubility parameters allowed to qualitatively predict the effect of polyimide choice and solvent composition used in the dope solution on membrane performance. Lower value of the introduced total solubility parameter was very well correlated with lower rejection. (C) 2011 Elsevier B.V. All rights reserved.