Ionic liquids as the MOFs/polymer interfacial binder for efficient membrane separation

Lin, Rijia and Ge, Lei and Diao, Hui and Rudolph, Victor and Zhu, Zhonghua (2016) Ionic liquids as the MOFs/polymer interfacial binder for efficient membrane separation. ACS Applied Materials and Interfaces, 8 (46). pp. 32041-32049. ISSN 1944-8244

Abstract

Obtaining strong interfacial affinity between filler and polymer is critical to the preparation of mixed matrix membranes (MMMs) with high separation efficiency. However, it is still a challenge for micron-sized metal organic frameworks (MOFs) to achieve excellent compatibility and defect-free interface with polymer matrix. Thin layer of ionic liquid (IL) was immobilized on micron-sized HKUST-1 to eliminate the interfacial nonselective voids in MMMs with minimized free ionic liquid (IL) in polymer matrix, and then the obtained IL decorated HKUST-1 was incorporated into 4,4′-(hexafluoroisopropylidene)-diphthalic anhydride−2,3,5,6-tetramethyl-1,3-phenyldiamine (6FDA-Durene) to fabricate MMMs. Acting as a filler/polymer interfacial binder, the favorable MOF/IL and IL/polymer interaction can facilitate the enhancement of MOF/polymer affinity. Compared to MMM with only HKUST-1 incorporation, MMM with IL decorated HKUST-1 succeeded in restricting the formation of nonselective interfacial voids, leading to an increment in CO2 selectivity. The IL decoration method can be an effective approach to eliminate interfacial voids in MMMs, extending the filler selection to a wide range of large-sized fillers.


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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: 13 Apr 2017 05:08
Last Modified: 22 Jun 2018 04:34
Uncontrolled Keywords: metal−organic frameworks; mixed matrix membrane; interfacial binder; ionic liquid; gas separation
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/acsami.6b11074
URI: http://eprints.usq.edu.au/id/eprint/31129

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