Tensioactifs antioxydants originaux pour la formulation de produits de préservation du bois

Abstract : The presented work concerns the synthesis and characterization of amphipilic antioxidant compounds for the formulation of wood preservatives allowing the preparation of waterborne formulations to reduce rejections of VOCs answering to increasing environmental pressures. Based on preliminary studies showing synergistical effects between fungicides and antioxidants, the aim of this study was to design compounds possessing surfactant and antioxidant properties allowing the formulation in water of insoluble organic fungicides and to reduce the necessary quantity of biocide due to synergistical effects with antioxidant properties. Three families of amphiphilic compounds were synthesized. The first one corresponds to hindered phenol derivatives, the second to hindered amine and the third one to quats "with green label" derived from ascorbic acid. Surfactant and antioxidant properties of all new synthesized compounds have been characterized. The use of aqueous formulations of propiconazole prepared from these new surface active agents allows to increase beech wood durability exposed to the white rot fungus Coriolus versicolor. Fungal growth inhibition tests realized on malt agar medium with various alkylammonium ascorbates presenting different alkyl chain?s lengths indicated an important growth inhibition of the mycelium for some of the tested products correlated at their amphiphilic properties.
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  • HAL Id : tel-01748426, version 1

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Thierry Koumbi Mounanga. Tensioactifs antioxydants originaux pour la formulation de produits de préservation du bois. Autre. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10084⟩. ⟨tel-01748426⟩

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