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Composite Films of Nanofibrillated Cellulose with Sepiolite: Effect of Preparation Strategy

2022-02-23Journal article Open access
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dc.contributor.authorAlves, Luis
dc.contributor.authorRamos, Ana
dc.contributor.authorRasteiro, Maria G.
dc.contributor.authorVitorino, Carla
dc.contributor.authorFerraz, Eduardo
dc.contributor.authorFerreira, Paulo J. T.
dc.contributor.authorPuertas, Maria L.
dc.contributor.authorGamelas, José A. F.
dc.date.accessioned2022-03-09T17:23:54Z
dc.date.available2022-03-09T17:23:54Z
dc.date.issued2022-02-23
dc.date.updated2022-03-04T16:27:52Z
dc.description.abstractCellulose nanofibrils (CNFs) are nanomaterials with promising properties to be used in food packaging and printed electronics, thus being logical substitutes to petroleum-based polymers, specifically plastics. CNFs can be combined with other materials, such as clay minerals, to form composites, which are environmentally friendly materials, with acceptable costs and without compromising the final properties of the composite material. To produce composite films, two strategies can be used: solvent casting and filtration followed by hot pressing. The first approach is the simplest way to produce films, but the obtained films may present some limitations. In the present work, CNFs produced using enzymatic or TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical) oxidation pretreatments, followed by high-pressure homogenization, or only by mechanical treatment (homogenization), were used to produce films by both the available procedures. The films obtained by filtration + hot pressing presented higher tensile strength and Young’s modulus compared with those obtained by solvent casting. In general, a decrease in the values of these mechanical properties of the films and a decrease in elongation at break, with the addition of sepiolite, were also observed. However, for the TEMPO CNF-based films, an improvement in tensile strength could be observed for 10% of the sepiolite content. Furthermore, the time necessary to produce films was largely reduced by employing the filtration procedure. Finally, the water vapour barrier properties of the films obtained by filtration are comparable to the literature values of net CNF films. Thus, this technique demonstrates to be the most suitable to produce CNF-based composite films in a fast way and with improved mechanical properties and suitable gas barrier properties.pt_PT
dc.description.sponsorshipThe authors acknowledge Julio Santarén for the collaboration and discussions on the dispersion of sepiolite in aqueous medium.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/coatings12030303pt_PT
dc.identifier.slugcv-prod-2768445
dc.identifier.urihttp://hdl.handle.net/10400.26/39671
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationChemical Process Engineering and Forest Products Research Centre
dc.relationTechnology, Restoration and Arts Enhancement Center
dc.relationNew generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties
dc.relation.publisherversionhttps://www.mdpi.com/2079-6412/12/3/303pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectbiodegradable materialspt_PT
dc.subjectnanocomposite filmspt_PT
dc.subjecttensile strengthpt_PT
dc.subjectYoung’s moduluspt_PT
dc.subjectwater permeabilitypt_PT
dc.titleComposite Films of Nanofibrillated Cellulose with Sepiolite: Effect of Preparation Strategypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleChemical Process Engineering and Forest Products Research Centre
oaire.awardTitleTechnology, Restoration and Arts Enhancement Center
oaire.awardTitleNew generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00102%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F05488%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FQUI-OUT%2F31884%2F2017/PT
oaire.citation.issue3pt_PT
oaire.citation.titleCoatingspt_PT
oaire.citation.volume12pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream9471 - RIDTI
person.familyNameAlves
person.familyNameFerraz
person.givenNameLuís
person.givenNameEduardo
person.identifier.ciencia-id8F17-D792-3D18
person.identifier.ciencia-idC517-A240-7C81
person.identifier.orcid0000-0003-4447-5107
person.identifier.orcid0000-0003-4717-6305
person.identifier.ridD-1531-2018
person.identifier.ridB-7140-2014
person.identifier.scopus-author-id55936457700
person.identifier.scopus-author-id7003480912
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
rcaap.cv.cienciaidC517-A240-7C81 | Eduardo Jorge Marques de Oliveira Ferraz
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6ce0c380-01fe-4f42-8277-9c3a57ece748
relation.isAuthorOfPublication94c2590f-fd7a-44e1-b6cd-31297c9da934
relation.isAuthorOfPublication.latestForDiscovery94c2590f-fd7a-44e1-b6cd-31297c9da934
relation.isProjectOfPublicationfb89bed9-aca7-42a1-b4c3-f8f8cbe99766
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