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Theses

Utilisation de solvants eutectiques profonds et de dérivés liquides ioniques pour la conception de nouveaux matériaux

Abstract : For several years, there has been growing interest in the development of new solvents, such as ionic liquids (ILs) and deep eutectic solvents (DESs). ILs are salts with a melting point below 100~°C. DES are solvents resulting from the mixing of molecules which interact strongly with each other by hydrogen bonds; this leads to the melting temperature decreasing and becoming lower than those of the starting compounds. ILs and DESs are interesting solvents with a negligible saturation vapour temperature. They are non-flammable, biocompatible and of natural origin, which is questionable for ILs. This manuscript describes the preparation of three categories of materials: 1) biobased materials based on guar, a plant-based polysaccharide, mixed with a panel of DES of natural origin to obtain fully biobased blends. This thesis includes different sections aiming t the development of materials using i) DES as solvents and structuring agents, ii) ILs as monomers. Their thermal, rheological and ion transport properties were characterized and the internal organization was studied by radiation scattering techniques, 2) graft copolymers consisting of guar as the main chain and having poly(ionic liquid) (PIL) side grafts; these copolymers were obtained by the "grafting from" approach using RAFT polymerization. 3) particles consisting entirely of PIL and derived from polymerization-induced self-assembly (PISA). New isomeric monomeric ILs with dual solubility in water once polymerized have been synthesized and used in PISA, allowing the generation of objects of various morphology and size.
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Submitted on : Wednesday, September 29, 2021 - 4:47:12 PM
Last modification on : Thursday, September 30, 2021 - 3:41:13 AM

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  • HAL Id : tel-03358909, version 1

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Jérémy Depoorter. Utilisation de solvants eutectiques profonds et de dérivés liquides ioniques pour la conception de nouveaux matériaux. Matériaux. Université de Lyon, 2021. Français. ⟨NNT : 2021LYSEI031⟩. ⟨tel-03358909⟩

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