Covalent Organic Framework Membranes through Sequential Imine Exchange for Precise Molecular Separation (IMAGE)
Caption
- A sequential imine exchange strategy is first proposed for the fabrication of highly crystalline and defect-free covalent organic framework (COF) membranes.
- Sequential exchange of two functional amine monomers with distinct exchange energy gaps enabled controlled crystallization and membrane formation, allowing large-area membrane fabrication (> 290 cm2) within 3 h.
- The fabricated COF membranes exhibited high permeance (344 L m−2 h−1 bar−1 for water and 462 L m−2 h−1 bar−1 for methanol), high rejection (> 99.9% for Congo red and Alcian blue 8GX), and an ultrahigh separation factor (> 528) for mixed dye aqueous solutions.
Credit
Tingyuan Wang, Yanan Liu*, Junhao Wu, Xiaocui Wei, Zongmei Li, Fu Zhao, Yixi Sun, Chunyang Fan, Yuhan Wang, Zhongyi Jiang*.
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CC BY-NC-ND