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Tannin-boron wood preservatives

Tondi Gianluca, Wieland Stefanie, Thévenon Marie-France, Pizzi Antonio. 2011. Tannin-boron wood preservatives. In : 1° Congresso Ibero-LatinoAmericano da Madeira na Construçao, Coimbra, Portugal, 7 a 9 de Junho de 2011. s.l. : s.n., 9 p. CIMAD 11 - Congresso Ibero-LatinoAmericano da Madeira na Construção. 1, Coimbra, Portugal, 7 June 2011/9 June 2011.

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Abstract : Tannin-boron wood preservatives are alternative products to replace water-borne formulations based on copper. Interesting results in protection against fungus (pycnoporus sanguineus) were achieved with formulations based of 20% tannin solutions containing boric acid (Thevenon et al. 2009). In this paper two upgrades are introduced: extension of preservation properties to softwood species (scots pine) and analysis of the side-properties achieved after treatment. A detailed study on tannin penetration in beech and scots pine is presented. Microscope analysis demonstrates that impregnation in scots pine have two preferential directions: Longitudinal through tracheids and radial through parenchyma rays, while in beech the liquid penetrates the wood cell mainly longitudinally through large and easy accessible vessels. Commercialization of exterior-door wood preservative will be also dependent on the side-properties derived from the treatment. For this reason, properties such as mechanical resistance and behavior against fire have been investigated. The mechanical tests have shown a strong increasing of compression resistance and surface hardness for beech and scots pine samples. The tests against fire have been monitored considering ignition, flame and ember time. A broad positive effect on fire-repellence is shown when wood is treated with tannin-boron formulations. (Résumé d'auteur)

Mots-clés Agrovoc : Acide borique, Tannin, Produit de préservation du bois, Fagus sylvatica, Pinus sylvestris, Lutte anti-incendie, Pycnoporus

Mots-clés complémentaires : Pycnoporus sanguineus

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

Auteurs et affiliations

  • Tondi Gianluca, University of Applied Science (AUT)
  • Wieland Stefanie, University of Applied Science (AUT)
  • Thévenon Marie-France, CIRAD-PERSYST-UPR Bois tropicaux (FRA)
  • Pizzi Antonio, ENSTIB (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/561719/)

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