Abstract
Mixed-matrix membranes (MMMs) that combine processable polymer with more permeable and selective filler have potential for molecular separation, but it remains difficult to control their interfacial compatibility and achieve ultrathin selective layers during processing, particularly at high filler loading. We present a solid-solvent processing strategy to fabricate an ultrathin MMM (thickness less than 100 nanometers) with filler loading up to 80 volume %. We used polymer as a solid solvent to dissolve metal salts to form an ultrathin precursor layer, which immobilizes the metal salt and regulates its conversion to a metal-organic framework (MOF) and provides adhesion to the MOF in the matrix. The resultant membrane exhibits fast gas-sieving properties, with hydrogen permeance and/or hydrogen–carbon dioxide selectivity one to two orders of magnitude higher than that of state-of-the-art membranes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1350-1356 |
| Number of pages | 7 |
| Journal | Science |
| Volume | 381 |
| Issue number | 6664 |
| DOIs | |
| State | Published - Sep 21 2023 |
Bibliographical note
KAUST Repository Item: Exported on 2023-09-27Acknowledgements: W.J. acknowledges funding from the Ministry of Science and Technology of the People’s Republic of China (2022YFB3804800), the National Natural Science Foundation of China (22038006, 21921006), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). Go.L. acknowledges funding from the National Natural Science Foundation of China (22278210) and the Natural Science Foundation of Jiangsu Province (BK20220002). We thank X. Ren (School of Chemistry and Molecular Engineering, Nanjing Tech University) for helpful discussions. We are grateful to the High-Performance Computing Center of Nanjing Tech University for supporting the computational resources.
ASJC Scopus subject areas
- General