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Valorisation de co-produits de filières agroindustrielles, de la chimie verte aux applications

Abstract : The need for a shift to a green economy is becoming increasingly urgent as confirmed by the recent IPCC report. In order to support the structuring of sustainable agro-industrial sectors for the production of energy or commodities, the parallel development of markets with smaller volumes but with very high added value is necessary. Among these high-potentiel markets, the health and cosmetics sectors are particularly promising. Two developments related to plant chemistry will be adresses by the prism of co-products generated after a first transformation of renewable resource. In the first place, the paper industry, in crisis, generates large quantities of sawdust that can be converted by flash pyrolysis into levoglucosenone. This chiral, bi-cycliv (5 and 7-membered) molecule with numerous chemical functionalities (ketone, acetal, alkene) is a platform compound opening up a vast field of opportunities for biosourced chemistry. Obtaining chiral molecules from levoglucosenone opens us applications in the pharmaceutical field, in the bio-control sector and also in food industry. On the other hand, para-hydroxycinnamic acids obtained from agricultural residues such as wheat bran, rapeseed or sunflower meal or mustard bran represent a source of phenolic compounds with high potential. These molecules are known to possess a certain number of physico-chemical (anti-radical, anti-UV) and biological (anticancer, anti-inflammatory) activities. Pathways of functionalization of these molecules by synthetic methods respecting the concepts of green chemistry will be explored in order to improve these properties, especially for the production of anti-UV.
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Submitted on : Friday, January 7, 2022 - 12:09:28 PM
Last modification on : Friday, August 5, 2022 - 2:38:11 PM
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Amandine Flourat. Valorisation de co-produits de filières agroindustrielles, de la chimie verte aux applications. Chimie organique. Ecole doctorale sciences fondamentales et santé - Université de Reims Champagne-Ardenne, 2020. Français. ⟨NNT : ⟩. ⟨tel-03516641⟩



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