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

Lin, Rijia, Ge, Lei, Diao, Hui, 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: 32041-32049. doi:10.1021/acsami.6b11074

Author Lin, Rijia
Ge, Lei
Diao, Hui
Rudolph, Victor
Zhu, Zhonghua
Title Ionic liquids as the MOFs/polymer interfacial binder for efficient membrane separation
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
Publication date 2016-11-23
Sub-type Article (original research)
DOI 10.1021/acsami.6b11074
Open Access Status Not yet assessed
Volume 8
Issue 46
Start page 32041
End page 32049
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Subject 2500 Materials Science
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.
Keyword Gas separation
Interfacial binder
Ionic liquid
Metal-organic frameworks
Mixed matrix membrane
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID FT120100720
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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Centre for Microscopy and Microanalysis Publications
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