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dc.contributor.authorAbdulhamid, Mahmoud A.
dc.contributor.authorGenduso, Giuseppe
dc.contributor.authorMa, Xiaohua
dc.contributor.authorPinnau, Ingo
dc.date.accessioned2020-11-03T05:42:53Z
dc.date.available2020-11-03T05:42:53Z
dc.date.issued2020-10-23
dc.date.submitted2020-10-07
dc.identifier.citationAbdulhamid, M. A., Genduso, G., Ma, X., & Pinnau, I. (2021). Synthesis and characterization of 6FDA/3,5-diamino-2,4,6-trimethylbenzenesulfonic acid-derived polyimide for gas separation applications. Separation and Purification Technology, 257, 117910. doi:10.1016/j.seppur.2020.117910
dc.identifier.issn1873-3794
dc.identifier.issn1383-5866
dc.identifier.doi10.1016/j.seppur.2020.117910
dc.identifier.urihttp://hdl.handle.net/10754/665774
dc.description.abstractA sulfonic acid-functionalized trimethyl-substituted polyimide was synthesized by reacting 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 3,5-diamino-2,4,6-trimethylbenzenesulfonic acid (TrMSA). The properties of 6FDA-TrMSA were compared to the related 6FDA-derived polyimide analogues made from 2,4,6-trimethylbenzene-1,3-diamine (6FDA-TrMPD) and 3,5-diamino-2,4,6-trimethylbenzene benzoic acid (6FDA-TrMCA). Compared to 6FDA-TrMPD and 6FDA-TrMCA, sulfonic acid functionalization resulted in significantly lower surface area, reduced fractional free volume, and tighter chain d-spacing. Consequently, 6FDA-TrMSA displayed lower gas permeabilities with a commensurate increase in permeability-based gas-pair selectivities. The enhanced CO2/CH4 selectivity of 6FDA-TrMSA was caused exclusively by higher diffusion selectivity, which was promoted by strong hydrogen bonding induced by the [sbnd]SO3H functionalization. Permeation experiments of 6FDA-TrMSA with a 1:1 CO2-CH4 mixture revealed the occurrence of competitive sorption effects (depressing CO2 gas permeability) and CO2-induced polymer matrix plasticization, which reduced the polymer selectivity by enhancing CH4 permeability. At ~20 atm total pressure, 6FDA-TrMSA showed a CO2 permeability of ~15 Barrer and an equimolar CO2/CH4 mixed-gas selectivity of 55, which are ~2-fold higher performance values than those of the state-of-the-art polymer used for industrial scale natural gas sweetening, i.e., cellulose triacetate.
dc.description.sponsorshipThis work was supported by funding from King Abdullah University of Science and Technology (BAS/1/1323-01-01).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S1383586620323832
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Separation and Purification Technology, [257, , (2020-10-23)] DOI: 10.1016/j.seppur.2020.117910 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleSynthesis and characterization of 6FDA/3,5-diamino-2,4,6-trimethylbenzenesulfonic acid-derived polyimide for gas separation applications
dc.typeArticle
dc.contributor.departmentFunctional Polymer Membranes Group, Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentChemical Engineering Program
dc.identifier.journalSeparation and Purification Technology
dc.rights.embargodate2021-10-23
dc.eprint.versionPost-print
dc.identifier.volume257
dc.identifier.pages117910
kaust.personAbdulhamid, Mahmoud A.
kaust.personGenduso, Giuseppe
kaust.personMa, Xiaohua
kaust.personPinnau, Ingo
kaust.grant.numberBAS/1/1323-01-01
dc.date.accepted2020-10-17
dc.identifier.eid2-s2.0-85094095744
refterms.dateFOA2020-11-03T06:35:29Z


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