Surface modification of a commercial thin film composite polyamide reverse osmosis membrane by carbodiimide-induced grafting with poly(ethylene glycol) derivatives

Based on the existing carboxylic acid groups on surface of used commercial thin film composite polyamide reverse osmosis membrane, two kinds of poly(ethylene glycol) derivatives with different chains were grafted by carbodiimide-induced method to improve the antifouling property. The membranes befor...

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Bibliographic Details
Published in:Desalination 2011-07, Vol.275 (1-3), p.252-259
Main Authors: Kang, Guodong, Yu, Haijun, Liu, Zhongnan, Cao, Yiming
Format: Article
Language:English
Subjects:
Applied sciences
atomic force microscopy
chemical composition
Chemical engineering
contact angle
Derivatives
desalination
ethylene glycol
Exact sciences and technology
Fouling
Fourier transform infrared spectroscopy
Glycols
Grafting
Membrane separation (reverse osmosis, dialysis...)
Membranes
Pollution
Polyamide resins
reflectance
Reverse osmosis
scanning electron microscopy
surfactants
Thin films
X-ray photoelectron spectroscopy
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Summary:Based on the existing carboxylic acid groups on surface of used commercial thin film composite polyamide reverse osmosis membrane, two kinds of poly(ethylene glycol) derivatives with different chains were grafted by carbodiimide-induced method to improve the antifouling property. The membranes before and after modification were characterized by attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy and static contact angle measurement. Moreover, the water flux, NaCl rejection and fouling experiments were also conducted. The changes of chemical composition and morphology on membrane surfaces indicated the successful grafting of poly(ethylene glycol) derivatives. Compared to unmodified membrane, the modified membranes were more resistant to fouling in protein and cationic surfactant feeding solutions. The method in this study provided a new way for surface modification of commercial polyamide reverse osmosis membranes.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2011.03.007