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

Lin, Rijia, Ge, Lei, Hou, Lei, Strounina, Ekaterina, 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: 5609-5618. doi:10.1021/am500081e


Author Lin, Rijia
Ge, Lei
Hou, Lei
Strounina, Ekaterina
Rudolph, Victor
Zhu, Zhonghua
Title Mixed matrix membranes with strengthened MOFs/polymer interfacial interaction and improved membrane performance
Journal name ACS Applied Materials and Interfaces   Check publisher's open access policy
ISSN 1944-8252
1944-8244
Publication date 2014-04-23
Year available 2014
Sub-type Article (original research)
DOI 10.1021/am500081e
Volume 6
Issue 8
Start page 5609
End page 5618
Total pages 10
Place of publication Washington DC United States
Publisher American Chemical Society
Language eng
Formatted abstract
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.
Keyword Metal organic frameworks
Mixed matrix membranes
Interfacial interaction
Membrane morphology
Gas separation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
Centre for Advanced Imaging Publications
 
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