The potential of Wacapou (Vouacapoua americana) extracts to develop new biobased protective solutions for low-durability wood species

Kieny Emma, Candelier Kévin, Milhe Louis, Estevez Yannick, Sophie Cyrielle, Lehnebach Romain, Damay Jérémie, Florez Parra Daniela Carolina, Houël Emeline, Thévenon Marie-France, Bossu Julie. 2024. The potential of Wacapou (Vouacapoua americana) extracts to develop new biobased protective solutions for low-durability wood species. Journal of Renewable Materials, 22 p.

Résumé : The valorization of Amazonian wood residues into active chemical compounds could be an eco-friendly, cost-effective and valuable way to develop wood preservative formulations to enhance the decay and termite resistance of low-durable wood species. Wacapou (Vouacapoua americana., Fabaceae) is a well-known Guianese wood species commonly used in local wood construction due to its outstanding natural durability, which results from the presence of a large panel of extractives compounds. In addition, its industrial processing generates large amounts of residues. Wacapou residues were extracted by maceration using four different solvents (water/ethanol, ethyl acetate, hexane and dichloromethane/methanol), separately and successively. The yield of each extractive fraction was determined, and their chemical compositions were analyzed by Liquid Chromatography-Mass Spectrometry (LC-MS). Ethyl acetate led to the highest extraction yield, and the active compounds were identified in the obtained extractive fraction. In this sense, the fungicidal and termite-repellent properties of these extractives were then tested using a screening laboratory (with temperate and tropical microorganisms), according to the solution concentration (1%, 2.5%, 5%, 8% and 10%). Finally, Virola michelii Heckel wood samples (low durable species) were impregnated with the 8% concentration solution. The impregnated wood samples were then exposed to a soil bed test. The results highlighted that the nature of the solvent used during wood maceration affects the content of the obtained extractive fractions. Ultra-Performance Liquid Chromatography–High-Resolution Mass Spectrometry (UHPLC-HRMS) analyses showed the influence of extraction parameters on the nature of the extracted molecules. Wacapou extracts (from ethyl acetate maceration) showed good anti-fungal and anti-termite activities. Additionally, the concentration in extractives had an impact on the anti-termite activity level for Reticulitermes flavipes and Cryptotermes sp. Formulations based on Wacapou extractives showed a good potential for valorization in eco-friendly preservatives, aiming to confer better durability to local low-durability wood species.

Mots-clés Agrovoc : préservation du bois, bois, produit de préservation du bois, composition chimique, carie du bois, propriété antifongique, Reticulitermes flavipes, déchet de bois, virola, Isoptera, propriété technologique, Pycnoporus, fongicide, propriété antimicrobienne

Mots-clés géographiques Agrovoc : Guyane française

Mots-clés libres : Anti-fungal and anti-termite activities, Conferred durability, Extractives, French Guiana, Impregnation, Guianese species, Wood by-products

Agences de financement européennes : European Regional Development Fund

Agences de financement hors UE : Agence Nationale de la Recherche

Projets sur financement : (FRA) Agricultural Sciences for sustainable Development, (FRA) PANneaux THErmiques issus de la valorisation des Ressources bois Résiduelles en Guyane, (FRA) CEnter of the study of Biodiversity in Amazonia, (EU) EcovaloBois

Auteurs et affiliations

• Kieny Emma, CIRAD-PERSYST-UPR BioWooEB (GUF)
• Candelier Kévin, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0002-9328-8511 - auteur correspondant
• Milhe Louis, AgroParisTech (FRA)
• Estevez Yannick, CNRS (FRA)
• Sophie Cyrielle, CNRS (FRA)
• Lehnebach Romain, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0001-6175-4437
• Damay Jérémie, CIRAD-PERSYST-UPR BioWooEB (GUF) ORCID: 0000-0003-4658-0082
• Florez Parra Daniela Carolina, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0009-0004-0386-7141
• Houël Emeline, CNRS (FRA)
• Thévenon Marie-France, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Bossu Julie, Université de Guyane (GUF)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610656/)

Métriques

[ Page générée et mise en cache le 2024-12-14 ]