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Effect of chitosan properties and dissolution state on solution rheology and film performance in triboelectric nanogenerators

2025-07-05Journal article Open access
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dc.contributor.authorAraújo, Francisca
dc.contributor.authorMagalhães, Solange
dc.contributor.authorMedronho, Bruno
dc.contributor.authorEivazi, Alireza
dc.contributor.authorDahlström, Christina
dc.contributor.authorNorgren, Magnus
dc.contributor.authorAlves, Luís
dc.date.accessioned2025-10-09T10:46:56Z
dc.date.available2025-10-09T10:46:56Z
dc.date.issued2025-07-05
dc.description.abstractChitosan films with potential application in triboelectric nanogenerators (TENGs) represent a promising approach to replace non-biobased materials in these innovative devices. In the present work, chitosan with varying molecular weights (MW) and degrees of deacetylation was dissolved in aqueous acetic acid (AA) at different acid concentrations. It was observed that the MW had a greater influence on the viscosity of the solution compared to either the acid concentration or deacetylation degree. Gel formation occurred in high-MW chitosan solutions prepared with low AA concentration. Films prepared from chitosan solutions, through solvent-casting, were used to prepare TENGs. The power output of the TENGs increased with higher concentrations of AA used in the chitosan dissolution process. Similarly, the residual AA content in the dried films also increased with higher initial AA concentrations. Additionally, hot-pressing of the films significantly improves the TENG power output due to the decrease in morphological defects of the films. It was demonstrated that a good selection of the acid concentration not only facilitates the dissolution of chitosan but also plays a key role in defining the properties of the resulting solutions and films, thereby directly impacting the performance of the TENGs.eng
dc.description.sponsorshipCEECIND/01014/2018; CEECIND/CP1656/CT0025
dc.identifier.doi10.3390/gels11070523
dc.identifier.issn2310-2861
dc.identifier.urihttp://hdl.handle.net/10400.1/27810
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationMediterranean Institute for Agriculture, Environment and Development
dc.relationCHANGE - Global Change and Sustainability Institute
dc.relationChemical Process Engineering and Forest Products Research Centre
dc.relation.ispartofGels
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectChitosan
dc.subjectAcetic acid
dc.subjectSolution viscosity
dc.subjectFilm formation
dc.subjectTriboelectric nanogenerators
dc.titleEffect of chitosan properties and dissolution state on solution rheology and film performance in triboelectric nanogeneratorseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMediterranean Institute for Agriculture, Environment and Development
oaire.awardTitleCHANGE - Global Change and Sustainability Institute
oaire.awardTitleChemical Process Engineering and Forest Products Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F05183%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0121%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00102%2F2020/PT
oaire.citation.issue7
oaire.citation.startPage553
oaire.citation.titleGels
oaire.citation.volume11
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMedronho
person.givenNameBruno
person.identifier.ciencia-id6918-9AB3-8D22
person.identifier.orcid0000-0003-0972-1739
person.identifier.ridP-5927-2014
person.identifier.scopus-author-id9940656700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublication4c03571a-93da-4504-8acf-c74326449852
relation.isAuthorOfPublication.latestForDiscovery4c03571a-93da-4504-8acf-c74326449852
relation.isProjectOfPublicationd587eda6-a571-4351-8b0e-27708a4ed29e
relation.isProjectOfPublication76778384-d236-4a36-b64b-882e4c653cd1
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