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Membrane Water Treatment Volume 13, Number 4, July 2022 , pages 191-199 DOI: https://doi.org/10.12989/mwt.2022.13.4.191 |
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Preparation of high-performance nanofiltration membrane with antioxidant properties |
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Feiyue Yu, Qinglei Zhang, Zhiqiang Pei, Xi Li, Xuexuan Yang and Yanbin Lu
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| Abstract | ||
| In industrial production, the development of traditional polyamide nanofiltration (NF) membrane was limited due to its poor oxidation resistance, complex preparation process and high cost. In this study, a composite NF membrane with high flux, high separation performance, high oxidation resistance and simple process preparation was prepared by the method of dilute solution dip coating. And the sulfonated polysulfone was used for dip coating. The results indicated that the concentration of glycerin, the pore size of the based membrane, the composition of the coating solution, and the post-treatment process had important effects on the structure and performance of the composite NF membrane. The composite NF membrane prepared without glycerol protecting based membrane had a low flux, when the concentration of glycerin increased from 5% to 15%, the pure water flux of the composite NF membrane increased from 46.4 LMH to 108.2 LMH, and the salt rejection rate did not change much. By optimizing the coating system, the rejection rate of Na2SO4 and PEG1000 was higher than 90%, the pure water flux was higher than 40 LMH (60psi), and it can withstand 20,000 ppm.h NaClO solution cleaning. When the post treatment processes was adjusted, the salt rejection rate of NaCl solution (250 ppm) reached 45.5%, and the flux reached 62.2 LMH. | ||
| Key Words | ||
| composite nanofiltration membrane; high flux; oxidation resistance; solution coating method; sulfonated polysulfone | ||
| Address | ||
| Feiyue Yu and Qinglei Zhang: Beijing Originwater Membrane Technology Co., Ltd. Beijing, 101407, P.R. China Zhiqiang Pei, Xuexuan Yang and Yanbin Lu: Beijing Originwater Separation Membrane Technology Co., Ltd. Beijing, 101407, P.R. China Xi Li: Cansino Biotech Co., Ltd. Tianjin, 300457, P.R. China | ||
