Mixed Matrix Membranes (MMMs) Comprising Exfoliated 2D Covalent Organic Frameworks (COFs) for Efficient CO 2 Separation
National University of Singapore · Fujian Institute of Research on the Structure of Matter · +2 more institutions
Abstract
Two water-stable covalent organic frameworks (COFs) named NUS-2 and NUS-3 having two-dimensional (2D) layered structures with different pore sizes were synthesized. These COFs were exfoliated into nanosheets and even monolayers with high aspect ratio. They were subsequently blended with commercial polymers poly(ether imide) (Ultem) or polybenzimidazole (PBI) into mixed matrix membranes (MMMs) exhibiting highly homogeneous textures due to the excellent compatibility between COF fillers and polymer matrixes. Thanks to the selective gas sorption properties of the porous COF fillers, the prepared MMMs exhibited increased gas permeabilities with NUS-2@PBI demonstrating an excellent H2/CO2 permselectivity that…
Citation impact
- FWCI
- 33.88
- Percentile
- 100%
- References
- 75
Authors
10Topics & keywords
- Membrane
- Materials science
- Polymer
- Chemical engineering
- Covalent bond
- Gas separation
- Porosity
- Covalent organic framework