Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4989054 | Journal of Membrane Science | 2017 | 19 Pages |
Abstract
A novel thin film nanocomposite (TFN) membrane was prepared by incorporating covalent organic frameworks (COFs) into polyamide (PA) layer on a polyether sulfone (PES) substrate, through interfacial polymerization method. The porous structure of COFs (SNW-1) provided more passageway for water transport. Meanwhile, the reaction between SNW-1 and trimesoyl chloride (TMC) during interfacial polymerization formed strong covalent bonds for better interface compatibility. The surface hydrophilicity of the hybrid membrane was improved due to the existence of amine-rich SNW-1. The influence of the interfacial polymerization conditions and piperazine (PIP) and the loading of SNW-1 on the membrane performance were investigated. The resultant PA-SNW-1/PES membrane with a SNW-1 loading of 1Â g/m2 exhibited an increased pure water flux from 100Â LÂ mâ2Â hâ1Â MPaâ1 to 192.5Â LÂ mâ2Â hâ1Â MPaâ1 compared to the pristine PA membrane while the rejection to Na2SO4 maintained above 80%. Moreover, the membrane also showed long-term running stability.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Chongbin Wang, Zhiyuan Li, Jianxin Chen, Zhen Li, Yongheng Yin, Li Cao, Yunlong Zhong, Hong Wu,