Preparation of poly(etherimide) based ultrafiltration membrane with low fouling property by surface modification with poly(ethylene glycol)
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Author list: Chinpa W., Qu้mener D., B่che E., Jiraratananon R., Deratani A.
Publisher: Elsevier
Publication year: 2010
Journal: Journal of Membrane Science (0376-7388)
Volume number: 365
Issue number: #
Start page: 89
End page: 97
Number of pages: 9
ISSN: 0376-7388
eISSN: 1873-3123
Languages: English-Great Britain (EN-GB)
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Abstract
This research describes a simple approach for attaching poly(ethylene glycol) chains onto the surface of asymmetric ultrafiltration poly(etherimide) (PEI) membranes. Jeffamineฎ 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 10wt%), modification time (0.5, 1, 3, and 5h) 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 0.5h 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 2wt% PEG-amine and reaction time lower than 5h. 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. ฉ 2010 Elsevier B.V.
Keywords
PEGylation, Poly(etherimide)
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