Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/105228
DC FieldValueLanguage
dc.contributor.authorAlves, Luís-
dc.contributor.authorRamos, Ana-
dc.contributor.authorFerraz, Eduardo-
dc.contributor.authorSanguino, Pedro-
dc.contributor.authorSantarén, Julio-
dc.contributor.authorRasteiro, Maria G.-
dc.contributor.authorGamelas, José A. F.-
dc.date.accessioned2023-02-09T15:20:56Z-
dc.date.available2023-02-09T15:20:56Z-
dc.date.issued2023-
dc.identifier.issn01691317pt
dc.identifier.urihttps://hdl.handle.net/10316/105228-
dc.description.abstractThe dispersion state and the efficiency of the mixture of the different components in a composite film have an important impact on its mechanical and optical properties. In the present work, the impacts of different dispersion treatments on the disaggregation state of fibrous clay particles in water, and on the properties of related cellulose nanofiber (CNF)-based composite films, were evaluated. X-ray diffraction studies, performed on samples of sepiolite and palygorskite, revealed only minor changes in the diffraction pattern when the minerals were subjected to ultrasonic treatment, with or without the addition of different chemical dispersing agents. Conversely, microscopic studies revealed important differences in the dispersion state of the samples, induced by the addition of the different dispersants, showing an improvement in the disaggregation of the mineral crystals. The composite films prepared with sepiolite (and carboxymethylcellulose, as chemical dispersant) dispersed using ultrasonic treatment, and different types of CNF, showed improved optical and mechanical properties when compared with composites of the same counterparts prepared with sepiolite dispersed using a high-speed shear disperser.pt
dc.description.sponsorshipThe present research was supported by the R&D Project “FILCNF-New generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties” (PTDC/QUI-OUT/31884/2017, CENTRO 01–0145-FEDER-031884), and the Strategic Research Centre Projects UIDB/00102/2020 and UIDB/05488/2020 funded by the Fundação para a Ciência e Tecnologia (FCT) and FEDER.pt
dc.language.isoengpt
dc.publisherElsevierpt
dc.relationinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC/QUI-OUT/31884/2017/PT/New generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier propertiespt
dc.relationinfo:eu-repo/grantAgreement/FCTUIDB/00102/ 2020pt
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/05488/2020/PT/Technology, Restoration and Arts Enhancement Centerpt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt
dc.subjectTransmission electron microscopypt
dc.subjectClay dispersionpt
dc.subjectCompositespt
dc.subjectCellulose nanofibrilspt
dc.subjectTransparencypt
dc.subjectClay mineralspt
dc.titleEffect of the dispersion state of minerals on the properties of cellulose nanofiber-based composite filmspt
dc.typearticle-
degois.publication.firstPage106823pt
degois.publication.titleApplied Clay Sciencept
dc.peerreviewedyespt
dc.identifier.doi10.1016/j.clay.2023.106823pt
degois.publication.volume233pt
dc.date.embargo2023-01-01*
uc.date.periodoEmbargo0pt
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypearticle-
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.cerifentitytypePublications-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0001-6084-4553-
Appears in Collections:I&D CIEPQPF - Artigos em Revistas Internacionais
FCTUC Eng.Química - Artigos em Revistas Internacionais
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