Mixed matrix membranes with strengthened MOFs/polymer interfacial interaction and improved membrane performance

Lin, Rijia and Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Hou, Lei and Strounina, Ekaterina and Rudolph, Victor and Zhu, Zhonghua (2014) Mixed matrix membranes with strengthened MOFs/polymer interfacial interaction and improved membrane performance. ACS Applied Materials and Interfaces, 6 (8). pp. 5609-5618. ISSN 1944-8244


MOFs-based mixed matrix membranes (MMMs) have attracted extensive attention in recent years due to their potential high separation performance, the low cost, and good
mechanical properties. However, it is still very challenging to achieve defect-free interface between micrometer-sized MOFs and a polymer matrix. In this study, [Cd2L(H2O)]2·5H2O (Cd-6F) synthesized using 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) as an organic ligand was introduced into the 6FDA-ODA polyimide matrix to achieve novel MOF MMMs. A specific interfacial interaction between MOF crystals and polymer chains was innovatively targeted and achieved through in situ
polymerization procedure. The enhanced adhesion between
MOF particles and polymer phase was observed, and the improved interfacial interaction between Cd-6F and the 6FDA-ODA polyimide matrix was confirmed by detailed
characterizations including FTIR and NMR. In the meantime, the gas permeance and selectivity of the MMMs are strongly
dependent on their morphology. The MMM derived from in situ polymerization presents excellent interfaces between
micrometer-sized MOF crystals and the polymer matrix, resulting in increased permeability and selectivity. The strategy shown here can be further utilized to select the MOF/polymer pair, eliminate interfacial voids, and improve membrane separation performance of MOFs-based MMMs.

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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/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 06 Jun 2017 05:01
Last Modified: 06 Jun 2017 05:01
Uncontrolled Keywords: metal organic frameworks; mixed matrix membranes; interfacial interaction; membrane morphology; gas separation
Fields of Research (2008): 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400409 Separation technologies
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: https://doi.org/10.1021/am500081e
URI: http://eprints.usq.edu.au/id/eprint/31137

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