| Autor: |
Yao-Shen Guo, Qiaohong Liu, Yue Shen, Naixin Wang, Yan-li Ji, Mwema Wanjiya, Quan-Fu An, Cong-Jie Gao |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Advanced Membranes, Vol 2, Iss , Pp 100038- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2772-8234 |
| DOI: |
10.1016/j.advmem.2022.100038 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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