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• W2063551317 abstract "Surface modification is a promising method to improve polymeric membrane's pervaporation performance. In this paper, the surface carboxylation of glutaraldehyde crosslinked chitosan (CS-GA) membrane was successfully achieved by the reaction of amine groups on the CS-GA membrane surface with anhydride groups of maleic anhydride (MA) in acetone solution. The resulting membrane was characterized by attenuated total reflectance-Fourier transform infrared spectra (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and contact angle measurement. The pervaporation performance of MA surface-modified CS-GA membrane (CS-GA-MA) for the separation of various organic/water mixtures was investigated. The results showed that both the flux and the separation factor were enhanced as CS-GA membrane was treated by MA. For the separation of 90 wt% ethanol/water mixture at 60 °C, the separation factor and the flux of the CS-GA-MA membrane were 634 and 300 g/m2 h, respectively. However, the separation factor and the flux of the un-modified CS-GA membrane was 105 and 250 g/m2 h. Meanwhile, the flux increased greatly and the water concentration in the permeate decreased slightly (by about 0.7%) as the operating temperature increased from 30 to 60 °C. Similar results were observed when the modified membrane was employed to separate various aqueous organic solutions. These data indicated that the surface carboxylation was a very effective method to improve pervaporation performance of CS-GA membrane for the separation of aqueous organic mixtures." @default.
• W2063551317 created "2016-06-24" @default.
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• W2063551317 date "2007-05-01" @default.
• W2063551317 modified "2023-10-17" @default.
• W2063551317 title "Maleic anhydride surface-modification of crosslinked chitosan membrane and its pervaporation performance" @default.
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• W2063551317 doi "https://doi.org/10.1016/j.memsci.2007.03.001" @default.
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