Membranes Incorporating 2D Single-Crystalline COFs for Superior Separation Performance: 3D Image-Informed Reactive Force Field Modeling and Scalable Mixed-Matrix Systems.
Aug 2026· Journal of the American Chemical Society· Vol 148 34, pp.
36997-37006
· 0 citations· 44 references
Medicine
Abstract
Bridging atomically precise materials design with scalable membrane manufacturing remains a central challenge in separation science. Two-dimensional covalent organic frameworks (2D COFs) offer tunable porosity and chemistry, but poor crystallinity and processability have limited their performance in membranes. Here we demonstrate that incorporating single-crystalline 2D COFs into anodic aluminum oxide supports and scalable mixed-matrix membrane enables exceptional separation performance, achieving ultrahigh permeance (MMM-SC-0.6: 8764 and 4531 L m-2 h-1 bar-1 for hexane and methanol, respectively) and near-quantitative rejection of nanoscale solutes. Reactive force field simulations through a multilayer COF model reveal the origins of rapid solvent transport and size selectivity through steric gating. These results establish highly crystalline COFs as practical, high-performance membrane materials and point to new routes for energy-efficient separations across chemical, environmental, and industrial technologies.
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