Monteiro, BernardoNabais, Ana R.Casimiro, Maria H.Martins, Ana P. S.Francisco, Rute O.Neves, Luísa A.Pereira, Cláudia C. L.2019-01-252019-01-252018-12-010076-6356PURE: 6547862PURE UUID: b4c9cf60-8e9e-4e80-a287-ff88de05ecc3Scopus: 85055641753WOS: 000455071400008PubMed: 30314326PubMedCentral: PMC6316195ORCID: /0000-0002-9620-6286/work/54824151ORCID: /0000-0003-3421-8676/work/53864269http://www.scopus.com/inward/record.url?scp=85055641753&partnerID=8YFLogxKPTDC/CTM-POL/2676/2014 IF/00505/2014 This work was performed under the project "SunStorage-Harvesting and storage of solar energy", with reference POCI-01-0145-FEDER-016387, funded by European Regional Development Fund (ERDF), through COMPETE 2020-Operational Programme for Competitiveness and Internationalization (OPCI), and by national funds, through FCT-Fundacao para a Ciencia e a Tecnologia I.P. This work was supported by the Associated Laboratory for Sustainable Chemistry-Clean Processes and Technologies-LAQV which is financed by national funds from FCT/MEC (UID/QUI/50006/2013) and cofinanced by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265) The NMR spectrometers are part of The National NMR Facility, supported by Fundacao para a Ciencia e a Tecnologia (RECI/BBB-BQB/0230/2012). A.R.N. and L.A.N. acknowledge FCT/MCTES for financial support through project PTDC/CTM-POL/2676/2014 and FCT Investigator Contract IF/00505/2014, respectively. C2TN/IST authors gratefully acknowledge the Fundacao para a Ciencia e Tecnologia support through the UID/Multi/04349/2013 project.The efficient separation of gases has industrial, economic, and environmental importance. Here, we report the improvement in gas separation performance of a polyimide-based matrix (Matrimid®5218) filled with a Cu-based metal organic framework [MOF, Cu3(BTC)2] with two different ionic liquids (ILs) confined within the pores. The chosen ILs are commonly used in gas solubilization, 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf]), and the incorporation of the [EMIM][BF4]@Cu-BTC and [EMIM][OTf]@Cu-BTC composites in Matrimid®5218 proved to be an efficient strategy to improve the permeability and selectivity toward CO2/N2 and CO2/CH4 mixtures.4146483engCu(BTC)2Gas separationIL@Cu(BTC)2IL@MOFIonic liquidsMetal-organic frameworksMixed matrix membranesChemical Engineering (miscellaneous)Process Chemistry and TechnologyFiltration and Separationjournal article10.3390/membranes8040093https://www.scopus.com/pages/publications/85055641753