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RESEARCH PRODUCT

Effect of Chitin Whiskers on the Molecular Dynamics of Carrageenan-Based Nanocomposites

Maria J. SanchisM. CarsíClara M. GómezFernando G. TorresSol Rodriguez

subject

Materials scienceElectric modulusPolymers and PlasticsWhiskers09.- Desarrollar infraestructuras resilientes promover la industrialización inclusiva y sostenible y fomentar la innovaciónChitinActivation energyDielectric relaxation spectroscopyCarrageenan15.- Proteger restaurar y promover la utilización sostenible de los ecosistemas terrestres gestionar de manera sostenible los bosques combatir la desertificación y detener y revertir la degradación de la tierra y frenar la pérdida de diversidad biológicaArticle14.- Conservar y utilizar de forma sostenible los océanos mares y recursos marinos para lograr el desarrollo sosteniblelcsh:QD241-441chemistry.chemical_compoundMolecular dynamicsBiomolèculeslcsh:Organic chemistryFragilitychemistry.chemical_classificationNanocomposite06.- Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todosGeneral ChemistryPolymerCiència dels materialsCarrageenan12.- Garantizar las pautas de consumo y de producción sosteniblesMontmorillonitechemistryChemical engineeringMAQUINAS Y MOTORES TERMICOSGlass transition

description

[EN] Films of carrageenan (KC) and glycerol (g) with different contents of chitin nanowhiskers (CHW) were prepared by a solution casting process. The molecular dynamics of pure carrageenan (KC), carrageenan/glycerol (KCg) and KCg with different quantities of CHWs as a filler was studied using dielectric relaxation spectroscopy. The analysis of the CHW effect on the molecular mobility at the glass transition, T-g, indicates that non-attractive intermolecular interactions between KCg and CHW occur. The fragility index increased upon CHW incorporation, due to a reduction in the polymer chains mobility produced by the CHW confinement of the KCg network. The apparent activation energy associated with the relaxation dynamics of the chains at T-g slightly increased with the CHW content. The filler nature effect, CHW or montmorillonite (MMT), on the dynamic mobility of the composites was analyzed by comparing the dynamic behavior of both carrageenan-based composites (KCg/xCHW, KCg/xMMT).

yearjournalcountryeditionlanguage
2019-06-01
10.3390/polym11061083https://doi.org/10.3390/polym11061083