Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/108877
DC FieldValueLanguage
dc.contributor.authorAlves, Luís-
dc.contributor.authorRamos, Ana-
dc.contributor.authorFerraz, Eduardo-
dc.contributor.authorFerreira, Paulo J. T.-
dc.contributor.authorRasteiro, Maria G-
dc.contributor.authorGamelas, José A. F.-
dc.date.accessioned2023-09-21T13:37:47Z-
dc.date.available2023-09-21T13:37:47Z-
dc.date.issued2023-
dc.identifier.issn0969-0239pt
dc.identifier.issn1572-882Xpt
dc.identifier.urihttps://hdl.handle.net/10316/108877-
dc.description.abstractGas barrier properties are very relevant in composite materials for applications so diverse such as food packaging, electronics, or old document restoration. In the present work, four different types of cellulose nanofibres (CNFs), two types of clay minerals used individually (sepiolite) or combined (sepiolite + kaolinite), and the influence of pH, were explored in the production of composite films. Neat CNFs, only mechanically treated or prepared by enzymatic pre-treatment, gave films with good mechanical and barrier properties, but the addition of minerals led to a dramatic loss of these properties. Contrarily, the use of thin and functionalized fibrils (TEMPO-oxidised or cationized CNFs) gave composite films with good mechanical, thermal and barrier properties. Superior oxygen barrier properties (oxygen transmission rate (OTR) < 0.4 cm3 m−2 day−1) were obtained using TEMPO-oxidised CNF and 20% sepiolite, and, in general, for all the composite films containing the TEMPO CNF (OTR ≤ 1.8 cm3 m−2 day−1). The cationic CNF-based composites also showed a very good oxygen barrier (OTR ≤ 8.2 cm3 m−2 day−1). The high oxygen barrier could be explained by the compactness of the films and better entanglement of the more fibrillated nanocelluloses with the mineral particles. A decrease in the pH of the suspensions led to a decrease in the film preparation time, without a major negative impact on the composite film’s properties.pt
dc.description.sponsorshipThe authors would like to acknowledge Fundação para a Ciência e Tecnologia (FCT) and FEDER for the financial support. The CIEPQPF is also acknowledged for the facilities and resource’s availability during the project development.pt
dc.language.isoengpt
dc.publisherSpringer Naturept
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/FCT/UIDB/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/4.0/pt
dc.subjectNanocellulosept
dc.subjectCellulose nanofbrilspt
dc.subjectWater vapour transmission ratept
dc.subjectOxygen transmission ratept
dc.subjectGas permeabilitypt
dc.subjectTensile strengthpt
dc.titleDesign of cellulose nanofibre-based composites with high barrier propertiespt
dc.typearticle-
degois.publication.titleCellulosept
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s10570-023-05495-zpt
dc.peerreviewedyespt
dc.identifier.doi10.1007/s10570-023-05495-zpt
dc.date.embargo2023-01-01*
uc.date.periodoEmbargo0pt
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.languageiso639-1en-
item.openairetypearticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.researchunitCIEPQPF – Chemical Process Engineering and Forest Products Research Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0003-4447-5107-
crisitem.author.orcid0000-0002-4503-6811-
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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