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New proton exchange membranes based on ionic liquid doped chitosan

2025-06Journal article Open access
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorNaffati, Naima
dc.contributor.authorTeixeira, Fatima
dc.contributor.authorTeixeira, António Paulo Silva
dc.contributor.authorRangel, Carmen M.
dc.date.accessioned2025-07-16T14:14:31Z
dc.date.available2025-07-16T14:14:31Z
dc.date.issued2025-06
dc.description.abstractABSTRACT: The development of new proton exchange membranes (PEM) for electrochemical devices have attracted researcher's attention in the pursuit for more sustainable and cost-effective technologies for clean energy production and conversion. In this work, new doped chitosan (CS) membranes were prepared by the casting method. Chitosan is an abundant, biodegradable and non-toxic material, and as a membrane, a sustainable and cheaper alternative to those perfluorinated and commonly used, such as Nafion. Three different ionic liquids were employed as dopants, ([EMIM][OTf], [EMIM][FSI] and [MIMH][HSO4]), in various concentrations and up to 50 wt% load. The new membranes were characterized by ATR-FTIR, thermogravimetry, using TGA and DSC techniques to assess their thermal properties, and by SEM, to analyse their surface morphology. Proton conduction properties of the new membranes were assessed by Electrochemical Impedance Spectroscopy (EIS). The new doped membranes showed an increase in the proton conduction compared with pristine chitosan membranes. The incorporation of ionic liquids into chitosan membranes improved their proton conductivity and thermal properties, with [EMIM][OTf] and [MIMH][HSO4] showing the most promising results. A 2-fold increment in the proton conduction was generally observed with the increase of the temperature from 30 to 60 degrees C. The best proton conductivity was found at 60 degrees C for the membrane doped with [EMIM][OTf], with a value of 47 mS.cm(-1).eng
dc.identifier.citationNaffati, N., Teixeira, F.C., Teixeira, A.P.S. & Rangel, C.M. (2025). New proton exchange membranes based on ionic liquid doped chitosan. In: Solid State Ionics, 2025, vol. 424, article 116852. https://doi.org/10.1016/j.ssi.2025.116852
dc.identifier.doi10.1016/j.ssi.2025.116852
dc.identifier.eissn1872-7689
dc.identifier.issn0167-2738
dc.identifier.urihttp://hdl.handle.net/10400.9/5986
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationUnderstanding CO2 electro-reduction in porous materials
dc.relationSunlight driven carbon-dioxide reduction: Hybrid catalytic systems consisting of molecular catalysts and light-harvesting Quantum-dots and semiconductors
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S0167273825000712?via%3Dihub
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectProton exchange membrane
dc.subjectChitosan membranes
dc.subjectIonic liquids
dc.subjectFuel cells
dc.subjectElectrolysis
dc.titleNew proton exchange membranes based on ionic liquid doped chitosaneng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleUnderstanding CO2 electro-reduction in porous materials
oaire.awardTitleSunlight driven carbon-dioxide reduction: Hybrid catalytic systems consisting of molecular catalysts and light-harvesting Quantum-dots and semiconductors
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEQU-EPQ%2F2195%2F2021/PT
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/745604/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
oaire.citation.titleSolid State Ionics
oaire.citation.volume424
oaire.fundingStream3599-PPCDT
oaire.fundingStreamH2020
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameTeixeira
person.familyNameTeixeira
person.familyNameRangel
person.givenNameFatima
person.givenNameAntónio Paulo Silva
person.givenNameCarmen M.
person.identifier.ciencia-idC014-509B-D1DC
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0003-0801-2068
person.identifier.orcid0000-0001-7448-0893
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridN-5456-2014
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id7102746385
person.identifier.scopus-author-id36856362300
person.identifier.scopus-author-id7006108156
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
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