Highly anions-selective polyamide nanofiltration membrane fabricated by rod-coating assisted interfacial polymerization

Conventional interfacial polymerization (IP) requires excessive amounts of reactive monomers and solvents due to the dip-coating method. Herein, we report a rod-coating assisted IP process to prepare nanofiltration (NF) membranes. The results demonstrate that a perfect PA layer can be fabricated by...

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Bibliographic Details
Published in:Journal of membrane science 2023-02, Vol.668, p.121273, Article 121273
Main Authors: Liu, Zhiyu, Zhao, Lihua, Ye, Haixing, Wang, Zhongyang, Chen, Yuhao, Li, Yuxuan, Liu, Liping, Guo, Yaoli, Chen, Yi, Niu, Q. Jason
Format: Article
Language:English
Subjects:
Interfacial polymerization
Ion sieving
NF membrane
Rod-coating
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Summary:Conventional interfacial polymerization (IP) requires excessive amounts of reactive monomers and solvents due to the dip-coating method. Herein, we report a rod-coating assisted IP process to prepare nanofiltration (NF) membranes. The results demonstrate that a perfect PA layer can be fabricated by using low monomer dosages of PIP (0.08 g/m2) and TMC (0.016 g/m2). This can significantly reduce the consumption of monomers and organic solvents, and effectively avoid the waste of hazardous and expensive chemicals. Thanks to the fewer monomer dosages, the prepared NF membranes were much thinner and looser, which significantly improved the membrane permeability. The highest permeance of the rod-coated membranes reached 204.0 L/(m2 h MPa), which was increased by ∼251% compared to the dip-coated NF membrane. More importantly, the rod-coated membranes possessed excellent Na2SO4 rejections (>99.0%) and ultralow NaCl rejections (
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2022.121273