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Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study

2020Journal article Open access
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dc.contributor.authorDeepa, B.
dc.contributor.authorAbraham, E.
dc.contributor.authorCordeiro, Nereida
dc.contributor.authorFaria, M.
dc.contributor.authorPrimc, G.
dc.contributor.authorPottathara, Y.
dc.contributor.authorLeskovšek, M.
dc.contributor.authorGorjanc, M.
dc.contributor.authorMozetič, M.
dc.contributor.authorThomas, S.
dc.contributor.authorPothan, L.A.
dc.date.accessioned2021-04-16T14:38:15Z
dc.date.available2021-04-16T14:38:15Z
dc.date.issued2020
dc.description.abstractTo develop bio-nanocomposites using natural biopolymers, nanocomposite films were prepared based on sodium alginate and kapok nanofibrils (CNFs). CNFs when subjected to TEMPO-mediated oxidation gave rise to cellulose nanocrystals (TOCNCs), with carboxyl groups at the surface ( Ka/Kb = 3.64). The differences between the two types of nanocelluloses (nanofibrils and nanocrystals) and their impact in the preparation of bio-nanocomposites, were studied. When incorporated in the matrix, the CNFs particles have the tendency to form surface aggregation ( Ka/Kb = 2.37), distorting the alginate network, creating heterogeneous films, with high surface roughness (S a = 29.37 nm), porosity (D p = 0.087 cm2/min) and vulnerability to heat. The TOCNCs present good dispersion creating a 3D network, which forms uniform (D p = 0.122 cm2/min) and homogeneous films, with smooth surface (S a = 16.83 nm). The ultrasonication treatment facilitated the dispersion improving the interfacial interaction between the reinforcing phase and the matrix. The results show the reinforcement potential of kapok nanocellulose in an industrially and medically important biopolymer, sodium alginate, especially when TOCNCs and ultrasonication were used.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDeepa, B., Abraham, E., Cordeiro, N., Faria, M., Primc, G., Pottathara, Y., ... & Pothan, L. A. (2020). Nanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance study. Heliyon, 6(2), e03266.pt_PT
dc.identifier.doi10.1016/j.heliyon.2020.e03266pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3300
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMaterials sciencept_PT
dc.subjectNanotechnologypt_PT
dc.subjectNanomaterialspt_PT
dc.subjectMaterials characterizationpt_PT
dc.subjectMaterials propertypt_PT
dc.subjectAgricultural technologypt_PT
dc.subjectNanofibrilspt_PT
dc.subjectNanocrystalspt_PT
dc.subjectTEMPO-Mediated oxidationpt_PT
dc.subjectSodium alginatept_PT
dc.subjectKapok fiberpt_PT
dc.subjectNanocompositept_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleNanofibrils vs nanocrystals bio-nanocomposites based on sodium alginate matrix: an improved-performance studypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue2pt_PT
oaire.citation.startPagee03266pt_PT
oaire.citation.titleHeliyonpt_PT
oaire.citation.volume6pt_PT
person.familyNamecordeiro
person.givenNamenereida
person.identifier1612636
person.identifier.ciencia-id521A-0F62-EA39
person.identifier.orcid0000-0001-6006-3415
person.identifier.ridO-2253-2019
person.identifier.scopus-author-id7004319456
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3d02b657-c48c-4f56-813a-1284b81960f3
relation.isAuthorOfPublication.latestForDiscovery3d02b657-c48c-4f56-813a-1284b81960f3

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