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Développement de résines de polycondensation à base de tanins pour produits industriels écologiques et innovateurs : Mousses rigides et produits de préservation bois

Abstract : Condensed tannins are natural products which can be used to replace phenol because they have similar features and similar chemical reactivity. Several project have been started to develop this class of tannins. The most important results have been obtained with tannin based rigid foams. These foams are produced by a condensation reaction between Mimosa tannin and furfuryl alcohol. Successively tannin foams have also undergone carbonisation. Chemical and physical properties of organic and carbonised foam have been studied. Good results have also been obtained for a tannin-bore wood preservative formulation. Tannin based rigid foams are low-density and high porosity materials. The cheap raw material and 95% of natural products combine with an extremely low thermal conductivity and make this foam suitable for several applications such as insulation material, floral foam, trap for metal and shock absorber. Once the foam has undergone carbonisation the properties are strongly modified. This material is constituted mainly of reorganised aromatic structures and furanic derivatives, some of which survive after the treatment. These foams can be useful for applications such as catalyst support, activated carbons, porous electrodes and thermal shield.
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Gianluca Tondi. Développement de résines de polycondensation à base de tanins pour produits industriels écologiques et innovateurs : Mousses rigides et produits de préservation bois. Autre. Université Henri Poincaré - Nancy 1, 2009. Français. ⟨NNT : 2009NAN10047⟩. ⟨tel-01748410⟩

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