Comparison of pure and mixed gas permeation of the highly fluorinated polymer of intrinsic microporosity PIM-2 under dry and humid conditions: experiment and modelling

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buir.contributor.authorSatılmış, Bekir
buir.contributor.authorUyar, Tamer
buir.contributor.orcidUyar, Tamer|0000-0002-3989-4481
dc.citation.spage117460en_US
dc.citation.volumeNumber594en_US
dc.contributor.authorFuoco, B.
dc.contributor.authorSatılmış, Bekir
dc.contributor.authorUyar, Tamer
dc.contributor.authorMonteleone, M.
dc.contributor.authorEsposito, E.
dc.contributor.authorMuzzi, C.
dc.contributor.authorTocci, E.
dc.contributor.authorLongo, M.
dc.contributor.authorDe Santo, M. P.
dc.contributor.authorLanč, M.
dc.contributor.authorFriess, K.
dc.contributor.authorVopička, O.
dc.contributor.authorIzák, P.
dc.contributor.authorJansen, J. C.
dc.date.accessioned2021-02-25T06:49:07Z
dc.date.available2021-02-25T06:49:07Z
dc.date.issued2020
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThis manuscript describes the gas separation performance of PIM-2, a partially fluorinated linear copolymer synthesized from 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethylspirobisindane (TTSBI) and decafluorobiphenyl (DFBP). As one of the early members of the family of polymers of intrinsic microporosity, it had never been tested as a gas separation membrane because of insufficient mechanical resistance. This has been solved only recently, allowing the preparation of robust self-standing films. Molecular modelling studies demonstrated a high fractional free volume (34%) and an elevated surface area (642 m2 g−1), and the latter is in good agreement with experimental BET results. Pure gas permeabilities measured on a fixed-volume time-lag instrument at 1 bar compare well with the results of mixed separation tests on a variable volume setup from 1-6 bar(a). Molecular modelling and independent sorption measurements on a gravimetric sorption balance both show strong dual-mode sorption behaviour, especially for CO2 and to a lesser extent for CH4. Temperature-dependent pure gas permeation measurements show typical Arrhenius behaviour, with a clear increase in the activation energy for diffusion with the increasing molecular size of the gas, indicating high size-selectivity. This is in agreement with the highly rigid PIM structure, determined by AFM force spectroscopy measurements. The dual-mode behaviour results in a moderate pressure dependence of the CO2 permeability and the CO2/N2 and CO2/CH4 selectivity, all slightly decreasing with increasing pressure. The presence of humidity in the gas stream has a remarkable small effect on the membrane performance, which is probably due to the high fluorine content and the consequently low water vapour solubility in the polymer, as confirmed by gravimetric sorption measurements. The manuscript describes an extensive study on the structure-property relationships in PIM-2.en_US
dc.description.sponsorshiphis work was further supported by the CNR-CAS bilateral agreement 2016–2018 “Innovative polymeric membranesfor pervaporation and advanced gas and vapour separations” and by theCzech Science Foundation (grant no. 18-05484S).en_US
dc.embargo.release2022-01-15
dc.identifier.doi10.1016/j.memsci.2019.117460en_US
dc.identifier.issn0376-7388
dc.identifier.urihttp://hdl.handle.net/11693/75574
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttps://dx.doi.org/10.1016/j.memsci.2019.117460en_US
dc.source.titleJournal of Membrane Scienceen_US
dc.subjectPolymer of intrinsic microporosityen_US
dc.subjectGas separation membraneen_US
dc.subjectHumid gas permeationen_US
dc.subjectCarbon captureen_US
dc.subjectMolecular modellingen_US
dc.titleComparison of pure and mixed gas permeation of the highly fluorinated polymer of intrinsic microporosity PIM-2 under dry and humid conditions: experiment and modellingen_US
dc.typeArticleen_US

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