Heat treatment of poplar plywood: Modifications in physical, mechanical and durability properties

Marcon Bertrand, Viguier Joffrey, Candelier Kévin, Thévenon Marie-France, Butaud Jean-Claude, Pignolet Luc, Gartili Adélaïde, Denaud Louis, Collet Robert. 2023. Heat treatment of poplar plywood: Modifications in physical, mechanical and durability properties. Iforest, 16 (1) : 1-9.

Résumé : Plywood made of poplar are limited to indoor usages since poplar exhibits a rather low natural durability. Recently, wood heat treatments have been applied to improve properties such as decay susceptibility and dimensional stability. This study examines the potential of exposing poplar plywood to heat treatment to extend the potential of applications of this engineered wood product to outdoor end uses, and new markets accordingly. Plywood panels were glued with two different adhesive formulations based on the same melamine-urea-formaldehyde (MUF) resin to compare their respective ability to resist to the heat treatment. These different plywoods were thermally modified in saturated steam conditions at 215 °C for 2 hours following the ThermoWood® process, up to reach 14% in mass loss. The durability improvement brought by the heat treatment was assessed in order to evaluate any possible outdoor uses for such plywood. After all the conducted analyses, the potential to use heat treated poplar plywoods in humid interior and protected exterior service conditions was confirmed.

Mots-clés Agrovoc : technologie du bois, traitement thermique, module d'élasticité, propriété mécanique, propriété du bois, Populus, contreplaqué

Mots-clés géographiques Agrovoc : France

Mots-clés complémentaires : Qualité du bois

Mots-clés libres : Heat treatment, Plywood, Poplar, Bending Modulus of Elasticity, Bending Strength, Bond Quality, Fungal Durability, Termite resistance

Classification Agris : K50 - Technologie des produits forestiers

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Agences de financement hors UE : Agence Nationale de la Recherche

Projets sur financement : (FRA) Plateforme d'Innovation "Forêt-Bois-Fibre-Biomasse du Futur"

Auteurs et affiliations

• Marcon Bertrand, Arts et Metiers Institute of Technology (FRA) - auteur correspondant
• Viguier Joffrey, Arts et Metiers Institute of Technology (FRA)
• Candelier Kévin, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0002-9328-8511
• Thévenon Marie-France, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Butaud Jean-Claude, Arts et Metiers Institute of Technology (FRA)
• Pignolet Luc, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Gartili Adélaïde, Université de Montpellier (FRA)
• Denaud Louis, Arts et Metiers Institute of Technology (FRA)
• Collet Robert, Arts et Metiers Institute of Technology (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/603303/)

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