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Effect of thermal modification temperature on the mechanical properties, dimensional stability, and biological durability of black spruce (Picea mariana)

Lekounougou S. Thierry et Kocaefe Duygu. (2014). Effect of thermal modification temperature on the mechanical properties, dimensional stability, and biological durability of black spruce (Picea mariana). Wood Material Science & Engineering, 9, (2), p. 59-66.

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URL officielle: https://doi.org/10.1080/17480272.2013.869256

Résumé

This study was aimed at evaluating the effect of thermal modification temperature on the mechanical properties, dimensional stability, and biological durability of Picea mariana. The boards were thermally modified at different temperatures 190, 200 and 210 °C. The results indicated that the thermal modification of wood caused a significant decrease in the modulus of rupture (MOR) after 190 °C, while the modulus of elasticity (MOE) seemed less affected with a slight increase up to 200 °C and slight decrease with further increase in temperature. The hardness of the thermally modified wood increased in the axial direction. This increase was also observed in tangential and axial directions but at a lesser extent. The final value was slightly higher in axial direction and lower in radial and tangential directions compared to those of the untreated wood. Dimensional stability improved with thermal modification in the three directions compared to the dimensional stability of unmodified wood. The fungal degradation results showed that the decay resistance of thermally modified wood against the wood-rotting fungi Trametes versicolor and Gloephyllum trabeum improved compared to that of the untreated wood. By contrast, the thermal modification of P. mariana had a limited effect on the degradation caused by the fungus Poria placenta.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:9
Numéro:2
Pages:p. 59-66
Version évaluée par les pairs:Oui
Date:2014
Sujets:Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:Biological resistance, dimensional stability, mechanical properties, Picea mariana, thermally modified wood, wood-rotting fungi, P. placenta, T. versicolor, G. trabeum
Déposé le:01 mai 2019 18:25
Dernière modification:01 mai 2019 18:25
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