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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/28522


    標題: Bioinspired fabrication of composite nanofiltration membrane based on the formation of DA/PEI layer followed by cross-linking
    作者: Li, Mingming
    Xu, Jia
    Chang, Chia-Yuan
    Feng, Chenchen
    Zhang, Lili
    Tang, Yuanyuan
    Gao, Congjie
    貢獻者: 環境工程與科學系
    關鍵字: Nanofiltration membrane
    Dopamine
    Polyethyleneimine
    Cross-linking
    日期: 2014-06
    上傳時間: 2015-05-06 21:19:19 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: This work deals with a facile approach to fabricate a novel nanofiltration (NF) membrane consisting of a dense active layer from polyethyleneimine (PEI) cross-linking on a porous polysulphone (PS) substrate which was modified by self-polymerized dopamine (DA). Inspired by the bioadhesion principle, a composite membrane with a poly(dopamine) (poly(DA)) layer was fabricated by simply dipping the PS substrate into DA aqueous solution. Later, the modified PS substrate was thermal-treated and then impregnated into PEI solution for PEI grafting on the poly(DA) layer. Finally, PEI cross-linking was performed and as a result a composite PS/DA/PEIc membrane with a dense cross-linked DA/PEI layer was obtained, which exhibited a typical NF property. Several parameters such as PEI grafting, thermal treatment, cross-linkers and operating conditions were investigated to obtain the optimum composite membrane with an excellent NF performance. The results showed that the optimum NF membrane yielded a permeation flux of 43.96 L/m(2) h and a rejection of 8927% when 2000 mg/L MgCl2 solution was used as a feed solution at 0.8 MPa, whereas a permeation flux of 49.21 L/m(2) h and a rejection of 27.30% were obtained for a feed NaCl concentration of 2000 mg/L. These results show the promising use of such NF membranes in water softening. (C) 2014 Published by Elsevier B.V.
    關聯: Journal of Membrane Science, v.459, pp.62-71
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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