期刊
JOURNAL OF MEMBRANE SCIENCE
卷 365, 期 1-2, 页码 89-97出版社
ELSEVIER
DOI: 10.1016/j.memsci.2010.08.040
关键词
Poly(etherimide); PEGylation; Surface modification; Ultrafiltration
资金
- Commission on Higher Education
- Thai Research Fund (TRF) [MRG5080244, RTA5080014]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据