EFFECT OF THE HEAT TREATMENT ON PHYSICAL AND CHEMICAL PROPERTIES OF Pinus caribaea WOOD

• Autor(a) principal: Poubel, Dallyene da Silva
• Data de Publicação: 2016
• Outros Autores: Garcia, Rosilei Aparecida, Santos, Wanessa Aparecida dos, Oliveira, Gisely de Lima, Abreu, Heber dos Santos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Cerne (Online)
• Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/917
• topic: Dimensional stability; compression wood; thermal modification.

This study evaluated the effect of the heat treatment on physical properties (density, equilibrium moisture content, mass loss, volumetric and linear swelling and shrinkage) and chemical composition of normal (opposite side) and compression wood of Pinus caribaea Morelet. Samples of 25 x 25 x 50 mm were heat-treated under two different temperatures: 200 and 220 oC. The results indicated a reduction in equilibrium moisture content and swelling and shrinkage following heat treatment, independent of wood type. The compression wood showed higher longitudinal swelling than normal one, however, after heat treatment, the improvements were similar between both wood types. Samples heat-treated at 200 and 220 oC had mass losses of 9.94 and 21.03 %, respectively. The heat treatment promoted a relative increase in lignin content and a decrease in holocellulose and α-cellulose contents, indicating the occurrence of thermal degradation of these components.