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Influence of chitin nanocrystals on the dielectric behaviour and conductivity of chitosan-based bionanocomposites

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Influence of chitin nanocrystals on the dielectric behaviour and conductivity of chitosan-based bionanocomposites

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dc.contributor.author Salaberria, A.M. es_ES
dc.contributor.author TERUEL JUANES, ROBERTO es_ES
dc.contributor.author Badia, J.D. es_ES
dc.contributor.author Fernandes, S.C.M. es_ES
dc.contributor.author Sáenz de Juano-Arbona, V. es_ES
dc.contributor.author Labidi, J. es_ES
dc.contributor.author Ribes-Greus, A. es_ES
dc.date.accessioned 2020-06-12T03:33:50Z
dc.date.available 2020-06-12T03:33:50Z
dc.date.issued 2018-10-20 es_ES
dc.identifier.issn 0266-3538 es_ES
dc.identifier.uri http://hdl.handle.net/10251/146177
dc.description.abstract [EN] A series of bionanocomposite films based on chitosan, reinforced with chitin nanocrystals, were developed, and assessed in terms of dielectric behaviour and conductivity by using an experimental methodology that allows avoiding the conductivity contribution and the exclusion of contact and interfacial polarization effects. The dielectric relaxations at low and high frequency and temperatures were modeled by Havriliak-Negami functions. Below the glass transition temperature (Tg), the gamma and beta relaxations were observed, which were related to intramolecular and non-cooperative segmental movements. At higher temperatures, an intermolecular and cooperative macromolecular movement, related to the glass transition, gave rise to alpha-relaxation. In addition, two over-Tg p(I) and p(II) relaxations were found, which were related to the displacement of dipoles in the disordered structure of bionanocomposites. The addition of chitin nanocrystals did not affect the apparent activation energy Ea of the gamma-relaxation. However, it decreased the Ea of the beta-relaxation and increased the free volume at temperatures in the vicinities of the alpha-relaxation. Finally, the electric conductivity of the bionanocomposites was lower than that of neat chitosan and chitin due to the interaction between the-OH and-NH2 groups that reduced the ionic mobility, along with the increase of free volume, with the subsequent separation of phases. es_ES
dc.description.sponsorship The European Regional Development Funds and the Spanish Ministry of Science and Innovation for the concession of Research Projects ENE2014-53734-C2-1-R, UPOV13-3E-1947 and ENE2017-86711-C3-1-R are appreciated. Generalitat Valenciana is acknowledged for the project APOSTD14/041 for JD Badia and GRISOLIA/2002/003 for R. Teruel-Juanes. The authors are thankful for the financial support from the Department of Education of the Basque Government (IT1008-18). es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation MINECO/UPOV13-3E-1947 es_ES
dc.relation GV/GRISOLIA/2002/003 es_ES
dc.relation Gobierno Vasco/Eusko Jaurlaritza/IT1008-18 es_ES
dc.relation GENERALITAT VALENCIANA/APOSTD/2014/041 es_ES
dc.relation MINECO/ENE2014-53734-C2-1-R-AR es_ES
dc.relation AEI/ENE2017-86711-C3-1-R es_ES
dc.relation.ispartof Composites Science and Technology es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Bionanocomposites es_ES
dc.subject Material testing es_ES
dc.subject Dielectric thermal analysis (DETA) es_ES
dc.subject Chitosan es_ES
dc.subject Chitin nanocrystals es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.subject.classification INGENIERIA DE LOS PROCESOS DE FABRICACION es_ES
dc.title Influence of chitin nanocrystals on the dielectric behaviour and conductivity of chitosan-based bionanocomposites es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.compscitech.2018.08.019 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Salaberria, A.; Teruel Juanes, R.; Badia, J.; Fernandes, S.; Sáenz De Juano-Arbona, V.; Labidi, J.; Ribes-Greus, A. (2018). Influence of chitin nanocrystals on the dielectric behaviour and conductivity of chitosan-based bionanocomposites. Composites Science and Technology. 167:323-330. https://doi.org/10.1016/j.compscitech.2018.08.019 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.compscitech.2018.08.019 es_ES
dc.description.upvformatpinicio 323 es_ES
dc.description.upvformatpfin 330 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 167 es_ES
dc.relation.pasarela S\379304 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES
dc.contributor.funder Gobierno Vasco/Eusko Jaurlaritza es_ES
dc.contributor.funder Ministerio de Economía y Empresa es_ES
dc.contributor.funder European Regional Development Fund es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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