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Design of cellulose nanofibre-based composites with high barrier properties

dc.contributor.authorAlves, Luís
dc.contributor.authorRamos, Ana
dc.contributor.authorFerraz, Eduardo
dc.contributor.authorJ. T. Ferreira, Paulo
dc.contributor.authorG. Rasteiro, Maria
dc.contributor.authorA. F. Gamelas, José
dc.date.accessioned2023-11-06T11:51:50Z
dc.date.available2023-11-06T11:51:50Z
dc.date.issued2023-11
dc.date.updated2023-11-05T21:40:01Z
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_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_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s10570-023-05495-zpt_PT
dc.identifier.slugcv-prod-3386012
dc.identifier.urihttp://hdl.handle.net/10400.26/47854
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s10570-023-05495-zpt_PT
dc.titleDesign of cellulose nanofibre-based composites with high barrier propertiespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage10174pt_PT
oaire.citation.issue16pt_PT
oaire.citation.startPage10157pt_PT
oaire.citation.titleCellulosept_PT
oaire.citation.volume30pt_PT
person.familyNameFerraz
person.givenNameEduardo
person.identifier.ciencia-idC517-A240-7C81
person.identifier.orcid0000-0003-4717-6305
person.identifier.ridB-7140-2014
person.identifier.scopus-author-id7003480912
rcaap.cv.cienciaidC517-A240-7C81 | Eduardo Jorge Marques de Oliveira Ferraz
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication94c2590f-fd7a-44e1-b6cd-31297c9da934
relation.isAuthorOfPublication.latestForDiscovery94c2590f-fd7a-44e1-b6cd-31297c9da934

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