Thermal modification and technological characteristics of wood of Eucalyptus cloeziana

• Autor(a) principal: Huller, Lenon Augusto Simon
• Data de Publicação: 2017
• Outros Autores: Haselein, Clóvis Roberto, Silveira, Amanda Grassmann da, Menezes, Walmir Marques de, Talgatti, Maiara, Souza, Joel Telles de, Santini, Elio José
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Florestal Brasileira (Online)
• Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1288
• topic: Estabilidade dimensional; Termorretificação; Qualidade da madeira; Dimensional stability; Thermal treatment; Wood quality

The genera Eucalyptus is widely used by Brazilian industries. Nonetheless some concerns still persist regarding some of its technological properties. Aiming the improvement of the wood properties the heat treatment is being largely employed in Brazil. The objective of this research was to study the effect of heat treatment on physical and mechanical properties of Eucalyptus cloeziana. We sampled 5 trees with 21 years from which we used the first two logs with length of 3 m each. Heat treatment of 160 and 210 °C were applied for 1 h. The evaluate physical properties were equilibrium moisture content, mass reduction, loss of density, total swelling coefficient (linear and volumetric) and coefficient of anisotropy. The determination of the mechanical strength came through the test of maximum resistance to impact. There was a reduction of the material mass after application of the temperatures. The other evaluated physical properties indicate that the heat treatment was effective in increasing dimensional stability of species, especially under the temperature of 210 °C. However, the resistance to impact was drastically affected by temperature increasing.