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dc.contributor.authorCacho-Bailo, Fernando
dc.contributor.authorEtxeberría-Benavides, Miren
dc.contributor.authorKarvan, Oğuz
dc.contributor.authorTéllez, Carlos
dc.contributor.authorCoronas, Joaquín
dc.date.accessioned2017-04-10T13:09:06Z
dc.date.available2017-04-10T13:09:06Z
dc.date.issued2017
dc.identifier.citationCacho-Bailo, Fernando, Miren Etxeberría-Benavides, Oğuz Karvan, Carlos Téllez, and Joaquín Coronas. “Sequential Amine Functionalization Inducing Structural Transition in an Aldehyde-Containing Zeolitic Imidazolate Framework: Application to Gas Separation Membranes.” CrystEngComm 19, no. 11 (2017): 1545–1554. doi:10.1039/c7ce00086c.en
dc.identifier.issn1466-8033en
dc.identifier.urihttp://hdl.handle.net/11556/385
dc.description.abstractA modification in the gas separation performance of zeolitic imidazolate framework (ZIF)-supported hollow fiber (HF) membranes by means of an imine-condensation functionalization reaction carried out by microfluidics is reported. The accommodation of voluminous amine molecules in the SIM-1, Zn(4-methyl-5-imidazolecarboxaldehyde)2, also known as ZIF-94, sod structure during the functionalization reaction caused the ZIF atoms to be rearranged in a less dense rho structure, with a wider pore diameter and a diminished CO2 affinity. These changes had effects on the membrane performance, resulting in an enhanced CO2 permeance while maintaining a good permeance–selectivity balance. ZIF aldehyde-containing SIM-1 membranes were earlier prepared on the inner side of polymeric P84® HF using a microfluidic approach. The SIM-1 membranes displayed very interesting results in the separation of gas mixtures of great relevance to the natural gas field. High selectivities in the separation of He/CH4 (160), H2/CH4 (136) and CO2/CH4 (38) mixtures were achieved, and these are the first SIM-1 membranes with such a high separation performance to the best of our knowledge. These SIM-1 membranes were in situ stepwise functionalized with long-chain amine solutions, namely, hexyl- and nonylamine. Microfluidics allowed the easy sequential implementation of this post-reaction step in the membrane fabrication procedure. An imine-condensation reaction took place between the aldehyde groups in the 4-methyl-5-imidazolecarboxaldehyde ligand forming SIM-1 and the corresponding amines. The extent of the reaction was analyzed by FTIR, TGA and XRD, together with the changes in the textural properties and the adsorption capacities.en
dc.description.sponsorshipFinancial support (MAT2013-40556-R, MAT2016-77290-R) from the Spanish MINECO, the Aragón Government (DGA, T05), the European Social Fund and FEDER is gratefully acknowledged.en
dc.language.isoengen
dc.publisherROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDen
dc.titleSequential amine functionalization inducing structural transition in aldehyde-containing zeolitic imidazolate framework: application to gas separation membranesen
dc.typearticleen
dc.identifier.doi10.1039/C7CE00086Cen
dc.isiYesen
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsZeolitic imidazolate framework (ZIF)en
dc.subject.keywordsSupported composite hollow fiber membraneen
dc.subject.keywordsZIF-94en
dc.subject.keywordsGas separationen
dc.issue.number11en
dc.journal.titleCrystEngCommen
dc.page.final1554en
dc.page.initial1545en
dc.volume.number19en


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