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Wood and its derivatives: Sustainable materials and products for future needs sections VI: Wood preservation, environment. Environmentally friendly wood protection based on tannin resin-boric acid association for outdoor long-time uses

Thévenon Marie-France, Tondi Gianluca, Pizzi Antonio. 2010. Wood and its derivatives: Sustainable materials and products for future needs sections VI: Wood preservation, environment. Environmentally friendly wood protection based on tannin resin-boric acid association for outdoor long-time uses. In : 7ème Séminaire International Ecole des Sciences et Technologies du Bois "Bois et dérivés: Eco-matériaux et produits pour les besoins futurs", 22-25 mars 2010, Rabat, Maroc. s.l. : s.n., Résumé, p. 58. Ecole des Sciences et Technologies du Bois. 7, Rabat, Maroc, 22 March 2010/25 March 2010.

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Abstract : Boron compounds are widely used in the field of wood preservatives as they can act as both fungi( ide and insecticide (even against termites) and present many other qualities like being odourless, colourless, non flammable, etc.... Nevertheless, in the field of wood protection, borates are considered for indoor uses only or in association with other biocides when for outdoor exposure. due to their main disadvantage of being readily leachable from treated wood. To overcome this problem, boric acid was fixed into wood with condensed tannins and hexamine through a non-formaldehyde emission polymer network. Different treated mixtures were tested with proportion of mimosa tannins and hexamine, added or not with boric acid, which concentration remained below the EU authorized levels. Such treated beech samples were leached and tested according to the guidelines of European Standard EN 113 against Pycnoporus sanguineus in tropical conditions. These systems proved their efficiency against boron depletion and fungal decay meeting the efficacy requirements of EN 113. Thus, such assoc ations could be envisaged to treat tropical timber with insufficient natural durability for above ground outdoor use, and for a long service-life of the wooden commodities. (Texte intégral)

Mots-clés Agrovoc : Produit de préservation du bois, Tannin, Acide borique, Composé hétérocyclique, Pycnoporus, Zone tropicale, Bois, Fagus sylvatica, Bois tropical

Mots-clés complémentaires : Hexamine, Pycnoporus sanguineus

Classification Agris : K50 - Processing of forest products
J12 - Handling, transport, storage and protection of forest products

Auteurs et affiliations

  • Thévenon Marie-France, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Tondi Gianluca, ENSTIB (FRA)
  • Pizzi Antonio, ENSTIB (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/554695/)

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