Affiliation:
1. State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Institution College of Chemistry Xinjiang University Urumqi 830017 Xinjiang China
2. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China
3. College of Automation Hangzhou Dianzi University Hangzhou 310018 China
Abstract
AbstractCovalent organic framework (COF) membranes featuring uniform topological structures and devisable functions, show huge potential in water purification and molecular separation. Nevertheless, the inability of uniform COF membranes to be produced on an industrial scale and their nonenvironmentally friendly fabrication method are the bottleneck preventing their industrial applications. Herein, we report a new green and industrially adaptable scraping‐assisted interfacial polymerization (SAIP) technique to fabricate scalable and uniform TpPa COF membranes. The process used non‐toxic and low‐volatility ionic liquids (ILs) as organic phase instead of conventional organic solvents for interfacial synthesis of TpPa COF layer on a support membrane, which can simultaneously achieve the purposes of (i) improving the greenness of membrane‐forming process and (ii) fabricating a robust membrane that can function beyond the conventional membranes. This approach yields a large‐area, continuous COF membrane (19×25 cm2) with a thickness of 78 nm within a brief period of 2 minutes. The resulting membrane exhibited an unprecedented combination of high permeance (48.09 L m−2 h−1 bar−1) and antibiotic desalination efficiency (e.g., NaCl/adriamycin separation factor of 41.8), which is superior to the commercial benchmarking membranes.
Funder
Natural Science Foundation of Xinjiang Uygur Autonomous Region
National Natural Science Foundation of China
National Key Research and Development Program of China
Fundamental Research Funds for the Central Universities
Subject
General Chemistry,Catalysis