Influência do tratamento térmico nas propriedades tecnológicas da madeira de três espécies amazônicas

Abstract

The aim of this study was to evaluate the influence of heat treatment on physical, mechanical and biological properties of wood Trattinnickia rhoifolia (amescla), Erisma uncinatum (cedrinho) and Apuleia leiocarpa (garapeira). For that purpose, test tubes were made with dimensions 2 x 2 x 1 cm (thickness, width and length, respectively), being exposed to the heat treatment at various combinations of time and temperature (180 ° C x 1h, 3h x 180 ° C x 1hr 200 ° C, 200 ° C x 3h, control), aiming the characterization of mass loss, colorimetry, Rockwell hardness, rate of absorption in water and biological resistance against termite Nasutitermes sp. attack wood decay. Weight loss was found for the three species, but was more effective for cedrinho wood. In the colorimetric analysis, the three species have suffered superficial browning. The woods of cedrinho and garapeira were found with higher hardness of Rockwell, for wood amescla occured an increased, except in the most severe treatment. Water absorption of cedrinho and garapeira woods was significantly reduced, however, this index increased for the amescla wood. Was concluded that the heat treatment was not effective against termite attack.