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Acide férulique, glycérol, acides gras et (bio-)catalyse : une combinaison efficace pour la production de nouveaux antioxydants polyphénoliques et résines époxy

Abstract : Despite their great antioxidant activities, the use of natural phenols as antioxidant additives for polyolefins is limited owing to their weak thermal stability and hydrophilic character. Herein, we report a sustainable chemo-enzymatic synthesis of renewable lipophilic phenolic antioxidants specifically designed to overcome these restrictions using naturally occurring ferulic acid (found in lignocellulose) and vegetal oils (i.e., lauric, palmitic, stearic acids, and glycerol) as starting materials. Antiradical activity (DPPH) as well as antioxidant activity (OIT) of these new fully biobased additives were reported to commercially available fossil-based antioxidants such as Irganox 1010® and Irganox 1076®. In addition, estrogenic activity tests revealed no endocrine disruption for newly created bisphenols. Glycidylation of all compounds afforded innocuous bio-based epoxy precursors. DSC, TGA and DMA analysis demonstrated that the thermo-mechanical properties of the obtained epoxy-amine resins can be finely tailored by judiciously selecting the fatty acid chain length.
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Louis Hollande. Acide férulique, glycérol, acides gras et (bio-)catalyse : une combinaison efficace pour la production de nouveaux antioxydants polyphénoliques et résines époxy. Biotechnologie. Institut agronomique, vétérinaire et forestier de France, 2019. Français. ⟨NNT : 2019IAVF0006⟩. ⟨tel-02364902⟩

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