Preparation of poly(etherimide) based ultrafiltration membrane with low fouling property by surface modification with poly(ethylene glycol)
Preparation of poly(etherimide) based ultrafiltration membrane with low fouling property by surface modification with poly(ethylene glycol)
复制标题
DOI：
10.1016/j.memsci.2010.08.040
复制
发表时间：
2010-12-01
影响因子：
9.5
通讯作者：
Deratani, Andre
中科院分区：
文献类型：
--
作者：
Chinpa, Watchanida;Quemener, Damien;Deratani, Andre
本研究描述了一种简单的方法，将聚（乙二醇）链连接到非对称超滤聚醚酰亚胺（PEI）膜表面。Jeffamine（R）M-2070，氨基封端的聚（环氧丙烷）/聚（环氧乙烷）嵌段共聚物（PEG-胺）用作表面改性剂。将常规浸渍沉淀法制备的PEI膜在PEG-胺的水溶液中进行处理，并通过衰减全反射FTIR、X射线光电子能谱、扫描电子显微镜和拉伸试验进行表征。研究了PEG-胺浓度（2和10 wt%）、改性时间（0.5、1、3和5 h）和处理温度对膜的形貌、亲水性、渗透性和抗污染性能的影响。水接触角测量和吸水率比表明，与PEG-胺处理仅0.5小时，导致更好的润湿性的改性PEI膜。对于较长的反应时间观察到孔径的扩大，并且较高的PEG-胺浓度导致PEI链通过过度接枝而断裂。当PEG-胺用量为2wt%、反应时间小于5 h时，可获得形态完整性、截留率和渗透性能的最佳折衷。基于蛋白质过滤实验，所获得的膜的抗污染性能进行了评价，结果表明，相对于未改性的PEI膜的抗蛋白质污染的大幅度提高。(C)2010 Elsevier B. V.保留所有权利。
This research describes a simple approach for attaching poly(ethylene glycol) chains onto the surface of asymmetric ultrafiltration poly(etherimide) (PEI) membranes. Jeffamine (R) M-2070, an amino terminated poly(propylene oxide)/poly(ethylene oxide) block copolymer (PEG-amine) was used as a surface modifying agent. PEI membranes prepared by conventional immersion precipitation were treated in an aqueous solution of PEG-amine and characterized by attenuated total reflectance FTIR, X-ray photoelectron spectroscopy, scanning electron microscopy and tensile tests. The effects of the PEG-amine concentration (2 and 10 wt%), modification time (0.5, 1, 3, and 5 h) and treatment temperature on the morphology, hydrophilicity, permeability, and anti-fouling property of the membrane were investigated. The water contact angle measurement and water absorbance ratio demonstrated that the treatment with PEG-amine for only 0.5 h resulted in a better wettability of the modified PEI membrane. An enlargement of the pore size was observed for the longer reaction times and the higher PEG-amine concentration accounted for a breaking of the PEI chains by over grafting. The best compromise in terms of morphology integrity, rejection and permeability performances, was obtained by using 2 wt% PEG-amine and reaction time lower than 5 h. Based on protein filtration experiments, the anti-fouling properties of the obtained membrane were evaluated, and the results showed a large improvement of resistance to protein fouling for the modified PEI membrane with respect to the unmodified one. (C) 2010 Elsevier B.V. All rights reserved.