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<dc:title xml:lang="en">Development of biodegradable and biobased multiphase films for single-use containers used in bioprocesses</dc:title>
<dcterms:alternative xml:lang="fr">Développement d'emballages complexes biodégradables et biosourcés pour le domaine des biotechnologies</dcterms:alternative>
<dc:subject xml:lang="fr">Amidon</dc:subject>
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<dc:subject xml:lang="fr">Biosourcé</dc:subject>
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<dc:subject xml:lang="fr">Réaction de Diels-Alder</dc:subject>
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<tef:elementdEntree autoriteExterne="031134556" autoriteSource="Sudoc">Matériaux -- Biotechnologie</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Après une évolution continue de la production des matières plastiques depuis les années 1950, il est temps de prendre en charge les aspects environnementaux liés à ces matériaux indispensables et aux propriétés uniques. Ceci passe par la prise en compte du début (ressources) et de la fin (circularité) de leur cycle de vie, notamment en utilisant des polymères biosourcés et biodégradables. Dans cette thèse, des films renouvelables sont développés et analysés pour des applications aux emballages utilisés dans les biotechnologies. Des films multicouches compatibilisés à base d’amidon plastifié et d’un polyester ont été coextrudés et caractérisés afin d’évaluer leurs propriétés et leur adéquation avec le domaine visé. Dans ce contexte, l’amidon et un polyester biodégradable ont été modifiés chimiquement afin de développer des réactions thermoréversibles de Diels-Alder à l’interface. Ces polymères modifiés ont permis d’améliorer les propriétés, notamment mécaniques, de ces systèmes. L’addition click de thiol-Michael et l’échange de ponts disulfures ont aussi été étudiés pour l’élaboration future de systèmes compatibilisés dynamiques avec de possibles traitements en fin de vie permettant un recyclage facilité.</dcterms:abstract>
<dcterms:abstract xml:lang="en">After a continuous growth of plastics production since the 1950s, it is time to take charge of the environmental aspects related to these indispensable materials with unique properties. This requires taking into account the beginning (resources) and the end (circularity) of their life cycle, especially by using biobased and biodegradable polymers. In this thesis, renewable films are developed and analyzed for applications to packaging used in biotechnologies. Compatibilized multilayer films based on plasticized starch and a polyester have been coextruded and characterized in order to evaluate their properties and their suitability for the targeted field. In this context, starch and a biodegradable polyester were chemically modified to develop thermoreversible Diels-Alder reactions at the interface. These modified polymers allowed to improve the properties, especially mechanical, of these systems. The thiol-Michael click addition and the disulfide bond exchange have also been studied for the future development of dynamic compatibilized systems with possible end-of-life treatments allowing an easier recycling.</dcterms:abstract>
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