Effects of mild hygrothermal treatment on the physical and vibrational properties of spruce wood - Archive ouverte HAL Access content directly
Journal Articles Composite Structures Year : 2020

Effects of mild hygrothermal treatment on the physical and vibrational properties of spruce wood

Sandrine Bardet
Iris Brémaud
Joseph Gril

Abstract

Spruce wood specimens were treated under mild temperatures 130°C and 150°C and different relative humidity from 0% to 25%. EMC reduced significantly for all the treatments. Weight loss (WL) increased insignificantly while the colour parameter, L*, decreased dramatically. Tanδ reduced significantly while the E/d has increased. After reconditioning, the partially reversibility has been achieved for EMC, tanδ and E/d. But, still an irreversible changes remains, which suggested being due to the chemical changes in wood polymers. While reversible changes has been resulted from the annealing of amorphous polymers. Since, the mild hygrothermal treatment applied to the specimens coincided with no significant WL, there was no obvious damage in wood structure while the irreversible changes present an improvement in vibrational properties by decrease in damping (tanδ), which could be due to the intermediate relative humidity of the treatment.
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Dates and versions

hal-03052748 , version 1 (10-12-2020)

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Elham Karami, Sandrine Bardet, Miyuki Matsuo, Iris Brémaud, Milan Gaff, et al.. Effects of mild hygrothermal treatment on the physical and vibrational properties of spruce wood. Composite Structures, 2020, 253, pp.112736. ⟨10.1016/j.compstruct.2020.112736⟩. ⟨hal-03052748⟩
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