Controlling molecular weight cut-off of PEEK nanofiltration membranes using a drying method
Controlling molecular weight cut-off of PEEK nanofiltration membranes using a drying method
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DOI：
10.1016/j.memsci.2015.07.012
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发表时间：
2015-11-01
影响因子：
9.5
通讯作者：
Livingston, Andrew
中科院分区：
文献类型：
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作者：
Burgal, Joao da Silva;Peeva, Ludmila;Livingston, Andrew
在这篇研究论文中，我们报告了两种控制聚醚醚酮膜的截留分子量（MWCO）的方法，通过相转化和随后的干燥制备。探索的两种方法是改变纺丝原液溶液中的聚合物浓度- 8重量%、10重量%和12重量% -以及在干燥之前改变填充孔的溶剂-例如水、甲醇、丙酮、四氢呋喃和正庚烷。结果表明，通过改变这些参数，可以使MWCO从295 g mol（-1）变化到1400 g mol（-1）。基于遗传算法的统计分析表明，汉森溶解度参数，极性和它们与摩尔体积的相互作用可能是最重要的参数，从不同的溶剂干燥时，影响聚醚醚酮膜的性能。此外，干燥温度也被证明对膜性能有影响-温度越高，截留率越高，渗透率越低。(C)2015年，作者。由爱思唯尔公司出版
In this research paper we report two ways of controlling the molecular weight cut-off (MWCO) of PEEK membranes prepared via phase inversion and subsequent drying. The two methods explored were the change of polymer concentration in the dope solution - 8 wt%, 10 wt% and 12 wt% - and the variation of solvent filling the pores prior to drying - e.g. water, methanol, acetone, tetrahydrofuran and n-heptane. The results show that it is possible to vary the MWCO from 295 g mol(-1) to 1400 g mol(-1) by varying these parameters. A statistical analysis based on a genetic algorithm showed that the Hansen solubility parameter, polarity and their interactions with molar volume were likely to be the most important parameters influencing the performance of PEEK membranes when drying from different solvents. In addition, the drying temperature also proved to have an effect on the membrane performance - the higher the temperature the higher the rejection and the lower the permeance. (C) 2015 The Authors. Published by Elsevier B.V.