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Comparison of weathering behavior of heat-treated jack pine during different artificial weathering conditions

Kocaefe Duygu, Huang Xianai et Kocaefe Yasar S.. (2013). Comparison of weathering behavior of heat-treated jack pine during different artificial weathering conditions. Dans : 4th International Conference on Fluid Mechanics and Heat & Mass Transfer (FLUIDSHEAT'13) , June 25-27, 2013, Dubrovnik, Croatia.

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Résumé

Heat treatment improves the dimensional stability (reduced hygroscopicity and wettabilty) of wood and its resistance to fungi, and results in darker color. However, wood loses its color when exposed to weathering (sunlight, rain etc.). In this study, the surface degradation and color loss of het-treated wood taking place during weathering were investigated under different conditions. Jack pine (Pinus banksiana) samples, heat-treated at 210°C, were exposed to artificial weathering with and without water spray for different times. Before and after exposure, their color and wettability by water were determined. Structural changes and chemical modifications at exposed surfaces were also investigated using florescent microscopy, SEM, FTIR spectroscopy, and XPS. The results revealed that the photo-degradation of lignin play important roles in color change and wetting behavior of heat-treated wood surfaces during weathering. Heat-treated wood was degraded more during weathering if exposed to water spray.

Type de document:Matériel de conférence (Non spécifié)
Date:2013
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:heat-treated wood, weathering, water spray, SEM, FTIR, XPS
Déposé le:06 mai 2019 19:57
Dernière modification:06 mai 2019 19:57
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