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Insightful understanding of the role of clay topology on the stability of biomimetic hybrid chitosan-clay thin films and CO2-dried porous aerogel microspheres

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Insightful understanding of the role of clay topology on the stability of biomimetic hybrid chitosan-clay thin films and CO2-dried porous aerogel microspheres

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dc.contributor.author Frindy, Sana es_ES
dc.contributor.author Primo Arnau, Ana María es_ES
dc.contributor.author Qaiss, Abou el Kacem es_ES
dc.contributor.author Bouhfid, Rachid es_ES
dc.contributor.author Lahcini, Mohamed es_ES
dc.contributor.author García Gómez, Hermenegildo es_ES
dc.contributor.author Bousmina, Mosto es_ES
dc.contributor.author El Kadib, Abdelkrim es_ES
dc.date.accessioned 2018-02-22T05:20:06Z
dc.date.available 2018-02-22T05:20:06Z
dc.date.issued 2016 es_ES
dc.identifier.issn 0144-8617 es_ES
dc.identifier.uri http://hdl.handle.net/10251/98271
dc.description.abstract [EN] Three natural clay-based microstructures, namely layered montmorillonite (MMT), nanotubular halloysite (HNT) and micro-fibrillar sepiolite (SP) were used for the synthesis of hybrid chitosan-clay thin films and porous aerogel microspheres. At a first glance, a decrease in the viscosity of the three gel forming solutions was noticed as a result of breaking the mutual polymeric chains interaction by the clay microstructure. Upon casting, chitosan-clay films displayed enhanced hydrophilicity in the order CS < CS-MMT < CS-HNT < CS-SP. Irrespective to the clay microstructure, an improvement in the mechanical properties of the chitosan-clay films has been substantiated with CS-SP reaching the highest value at 5% clay loading. While clay addition provides a way to resist the shrinkage occurring for native chitosan, the enhanced hydrophilicity associated to the water content affects the efficacy of the CO2 super-critical drying as the most hydrophilic CS-SP microspheres face the highest shrinkage, resulting in a lowest specific surface area compared to CS-HNT and CS-MMT. Chitosan-clay exhibits enhanced thermal properties with the degradation delayed in the order CS < CS-MMT < CS-HNT < CS-SP. Under acidic environment, a longevity has been substantiated for chitosan-clay compared to native chitosan, evidencing the beneficial protective effect of the clay particulates for the biopolymer. However, under hydrothermal treatment, the presence of clay was found to be detrimental to the material stability as a significant shrinkage occurs in hybrid CS-clay microspheres, which is attributed again to their increased hydrophilicity compared to the native polymeric microspheres. In this framework, a peculiar behavior was observed for CS-MMT, with the microspheres standing both against contraction during CO2 gel drying and under hydrothermal conditions. The knowledge gained from this rational design will constitute a guideline toward the preparation of ultra-stable, practically-optimized food-packaging films and commercially scalable porous bio-based adsorbents. es_ES
dc.description.sponsorship S. F thanks MAScIR foundation, CNRST and Erasmus Mundus-Maghreb & Egypt- EMMAG. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Carbohydrate Polymers es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Chitosan es_ES
dc.subject Montmorillonite es_ES
dc.subject Halloysite es_ES
dc.subject Sepiolite es_ES
dc.subject Thin films es_ES
dc.subject Porous microspheres es_ES
dc.subject Super-critical drying es_ES
dc.subject Stability es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Insightful understanding of the role of clay topology on the stability of biomimetic hybrid chitosan-clay thin films and CO2-dried porous aerogel microspheres es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.cabpel.2016.03.022 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Frindy, S.; Primo Arnau, AM.; Qaiss, AEK.; Bouhfid, R.; Lahcini, M.; García Gómez, H.; Bousmina, M.... (2016). Insightful understanding of the role of clay topology on the stability of biomimetic hybrid chitosan-clay thin films and CO2-dried porous aerogel microspheres. Carbohydrate Polymers. 146:353-361. doi:10.1016/j.cabpel.2016.03.022 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.cabpel.2016.03.022 es_ES
dc.description.upvformatpinicio 353 es_ES
dc.description.upvformatpfin 361 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 146 es_ES
dc.relation.pasarela S\328616 es_ES
dc.contributor.funder Moroccan Foundation for Advanced Science, Innovation and Research
dc.contributor.funder Centre National pour la Recherche Scientifique et Technique, Marruecos
dc.contributor.funder European Commission


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