Développement de formulations de produits de préservation du bois de faible toxicité et à longue durée d'action : application aux associations acide borique-tanins condensés et aux associations acide borique-protéines

Abstract : Boron is widely recognized ta act both as a fungicide and an insecticide, and to he environmentally acceptable and safe for the mammals. Its natura! solubility allows it to treat the wood, but this biocide provides oruy a short term protection. The aim of thiWs work was to create a natura! polymer network of low toxicity, 'able to retain the boron, in the form of boric acid, within the treated wood. Associations between condensed tannins and boric acid were shown to be unable to retard boron leaching. Proteins (ovalbumin,caseins, soja flour, gelatin) were also tested in association with boric acid. They were shown to reaet with boric acid through their peptidic groups, and when gelified within the timber were able to prevent boron depletion. Amongst these systems; the association of boric acid with ovalbumin has shown great efficiency in terms of boron retention and biological durability of treated wood (against Basidiomycetes and termites). This formulation (namely ovalbumin borate) can be dassified as low toxic, wide spectrum and long term wood preservative.
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Marie-France Thévenon. Développement de formulations de produits de préservation du bois de faible toxicité et à longue durée d'action : application aux associations acide borique-tanins condensés et aux associations acide borique-protéines. Autre. Université Henri Poincaré - Nancy 1, 1999. Français. ⟨NNT : 1999NAN10038⟩. ⟨tel-01754335⟩

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