Effect of thermal treatment on the physical properties of GG100 clone Eucalyptus wood

Materia

article

Felipe Gomes Batista¹  Dayane Targino de Medeiro¹  Adriano Reis Prazeres Mascarenhas¹  Lourival Marin Mendes¹  Danilo Wisky Silva¹  Daniel Tavares de Farias²  Alexandre Santos Pimenta³  Francisco Rodolfo Junior⁴  Edgley Alves de Oliveira Paula⁵  Rafael Rodolfo de Melo⁵ 

[1] Universidade Federal de Lavras;Universidade Federal de Santa Maria;Universidade Federal do Rio Grande do Norte;Universidade Federal do Piauí;Universidade Federal do Semiárido

关键词: Dimensional stability;    Thermal rectification;    Wood moisture;   

DOI  :  10.1590/1517-7076-RMAT-2022-0106

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Thermal treatment can modify undesirable characteristics of some woods, dimensional instability, and excessive water adsorption. The present research work aimed to assess the effect of thermal treatment on the physical properties of clone GG100 Eucalyptus wood. Wood samples were obtained from 9 year-old trees. Samples were subjected to three types of thermal treatment (T1, T2, and T3). In T1, the wood was kept in a laboratory kiln at 100 °C for 180 min. In T2, hydrothermal treatment was performed in an autoclave at 120 °C for 120 min. In T3, the combined autoclave and laboratory kiln treatments were employed. The properties evaluated were apparent density (ρa); mass loss (ML); longitudinal (βl), radial (βr), tangential (βt), and volumetric shrinkage (βv); anisotropic factor; and equilibrium moisture content. The treatments caused a decrease of ρa and increase of ML. The Equilibrium Moisture Content (EMC) was lowest for T3, and had a negative correlation with ML, βt, and ∆v. The Pearson correlation analysis indicated the results of the thermal treatments were similar, but T1 presented the lowest variation of the physical properties compared to the other treatments, giving it the best predictability for practical uses.

【 授权许可】

CC BY