Variation and Correlation of Heat-Treated Wood’s Crystalline Structure and Impact Toughness

Hong Yun, Dengyun Tu, Kaifu Li, Jun Huang, Lifang Ou

Abstract


This study aimed to investigate the changes in the fiber characteristics, relative crystallinity, and impact toughness of heat-treated Eucalyptus urophylla × E. camaldulensis. Samples were treated in a superheated steam kiln at 160, 180, 200, and 220 °C for 3 h. The crystallinity, length-width ratio of fibers, and impact toughness of the heat-treated and untreated wood were determined. The cellulose crystalline regions experienced no obvious change. However, the length-width ratio and the relative crystallinity of the fibers increased as the temperature increased. Results indicated a clear inverse trend in the impact toughness and relative crystallinity. Finally, the results could provide a new method for non-destructive testing of wood.

Keywords


Heat treatment; E. urophylla x E. camaldulensis; XRD; Length-to-width ratio; Aspect ratio; Impact toughness

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