Mixed-matrix membranes with metal–organic framework-decorated CNT fillers for efficient CO2 separation

Lin, Rijia and Ge, Lei and Liu, Shaomin and Rudolph, Victor and Zhu, Zhonghua (2015) Mixed-matrix membranes with metal–organic framework-decorated CNT fillers for efficient CO2 separation. ACS Applied Materials & Interfaces, 7 (27). pp. 14750-14757. ISSN 1944-8244

Abstract

Carbon nanotube (CNT) mixed-matrix membranes (MMMs) show
great potential to achieve superior gas permeance because of the unique structure of CNTs. However, the challenges of CNT dispersion in polymer matrix and elimination of interfacial defects are still hindering MMMs to be prepared for high gas selectivity. A novel CNT/metal−organic framework (MOF) composite derived from the growth of
NH2-MIL-101(Al) on the surface of CNTs have been synthesized and applied to fabricate polyimide-based MMMs. Extra amino groups and active sites were introduced to external surface of CNTs after MOF decoration. The good adhesion between the synthesized CNT-MIL fillers and polymer phase was observed, even at a high filler loadings up to 15%. Consequently, MMMs containing the synthesized MOF/CNT composite exhibit not only a large CO2 permeability but also a high CO2/CH4 selectivity; the combined performance of permeability and selectivity is even above the Robeson upper bound. The strategy of growing MOFs on CNTs can be further utilized to develop a more effective approach to further improve MMM performance through
the decoration of MOFs on existing fillers that have high selectivity to specific gas.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: No Faculty
Date Deposited: 27 Apr 2017 00:55
Last Modified: 28 Apr 2017 03:58
Uncontrolled Keywords: mixed-matrix membranes; carbon nanotubes; metal−organic frameworks; surface decoration; high-performance separation
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/acsami.5b02680
URI: http://eprints.usq.edu.au/id/eprint/31133

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