MOF Scaffold for a High-Performance Mixed-Matrix Membrane

Ke Xie; Qiang Fu; Paul A Webley; Greg G Qiao

doi:10.1002/anie.201804162

MOF Scaffold for a High-Performance Mixed-Matrix Membrane

Angew Chem Int Ed Engl. 2018 Jul 9;57(28):8597-8602. doi: 10.1002/anie.201804162. Epub 2018 Jun 11.

Authors

Ke Xie¹, Qiang Fu¹, Paul A Webley¹, Greg G Qiao¹

Affiliation

¹ Department of Chemical Engineering, The University of Melbourne, Australia.

PMID: 29767444
DOI: 10.1002/anie.201804162

Abstract

A novel composite membrane consisting of an interconnected MOF scaffold coated with cross-linked poly(ethylene glycol) (PEG) has been developed. As a result of its unique structure, the membrane shows an exceptional 18-fold permeability enhancement as compared to pristine PEG membranes, without compromising the selectivity. This performance is unattainable with current mixed-matrix membranes (MMMs). Our optimized membrane has a permeability of 2700 Barrer with a CO₂ /N₂ selectivity of 35, which surpasses the latest Robeson upper bound.

Keywords: MOF nonwoven cloths; bicontinuous phases; membranes; one-dimensional metal-organic frameworks; polymers.