Solvent-responsive covalent organic framework membranes for precise and tunable molecular sieving.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39693424.
- Also identified by DOI 10.1126/sciadv.ads0260 and PMC identifier 11654673.
- Licence recorded as CC BY-NC.
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Abstract
Membrane-based nanofiltration has the potential to revolutionize the large-scale treatment of organic solvents in various applications. However, the widely used commercial membranes suffer from low permeability, narrow structural tunability, and limited chemical resistance. Here, we report a strategy for fabricating covalent organic framework (COF) membranes with solvent-responsive structural flexibility. The interlayer shifting of these COF membranes in polar organic solvents results in sub-nanopores with high selectivity. High rejection rates (>99%), high permeance (>15 kilogram meter<sup>-2</sup> hour<sup>-1</sup> bar<sup>-1</sup>), and excellent organic solvent resistance of these smart COF membranes are achieved for a diverse array of nanofiltration applications.