Preparation of anti-fouling zwitterionic nanofiltration membrane with tunable surface charge

Yao-Shen Guo; Qiaohong Liu; Yue Shen; Naixin Wang; Yan-li Ji; Mwema Wanjiya; Quan-Fu An; Cong-Jie Gao

Advanced Membranes (Jan 2022)

Preparation of anti-fouling zwitterionic nanofiltration membrane with tunable surface charge

Yao-Shen Guo,
Qiaohong Liu,
Yue Shen,
Naixin Wang,
Yan-li Ji,
Mwema Wanjiya,
Quan-Fu An,
Cong-Jie Gao

Affiliations

Yao-Shen Guo: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou, 310027, China
Qiaohong Liu: Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China
Yue Shen: Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China
Naixin Wang: Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China
Yan-li Ji: Center for Membrane and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou, 310014, China
Mwema Wanjiya: Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China
Quan-Fu An: Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China; Corresponding author.
Cong-Jie Gao: Center for Membrane and Water Science &Technology, Ocean College, Zhejiang University of Technology, Hangzhou, 310014, China

Journal volume & issue: Vol. 2
p. 100038

Abstract

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Anti-fouling property is of vital significance and remains a challenge in the membrane separation field. In this work, N-diethylethylenediamine (DEEDA) was incorporated into the polyamide matrix first. Then, an anti-fouling zwitterionic nanofiltration membrane with tunable surface charge was fabricated by the grafting of p-xylylene dichloride (XDC) on the membrane surface. The resulting nanofiltration membrane possessed zwitterionic groups of positively charged N+ and negatively charged COO-. Meanwhile, the surface charge could be tuned precisely by the concentration of XDC. A neutrally charged nanofiltration membrane was obtained when the concentration of XDC was 1.0 wt% and the preparing membrane showed permeance of 9.1 L·m-2·h-1·bar-1 with high rejection of CaCl2 (90.8%) and Na2SO4 (91.3%) at pH = 6.5. This membrane exhibited excellent anti-fouling properties towards not only negatively charged bovine serum albumin but also positively charged lysozyme. The optimum membrane, PA-XDC-1.0, had flux recovery rates of 95.0% and 94.0% for bovine serum albumin and lysozyme, respectively, which was higher than those of PA-DEEDA-0 (86.1% and 80.7%). This work offered a facile way to fabricate an anti-fouling zwitterionic nanofiltration membrane with tunable surface charge, which had wide applications in water purification.

Published in Advanced Membranes

ISSN: 2772-8234 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology: Chemical engineering
Website: https://www.keaipublishing.com/en/journals/advanced-membranes/

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