Efeito do Tratamento Térmico com Óleo de Soja na Madeira de Pinus
Effect of Thermal Treatment With Soybean Oil on Wood Pinus
Zablonsky, Karine Mafra; Bonduelle, Ghislaine Miranda; Trianoski, Rosilani
Resumo
Este trabalho teve como objetivo avaliar a influência do tratamento térmico em óleo de soja sobre algumas propriedades físicas da madeira de Pinus sp., sendo avaliadas a variação dimensional, massa específica, empenamento e rachaduras em amostras com espessuras de 5 mm e 20 mm. As amostras foram submetidas ao tratamento térmico à temperatura de 80 °C e 160 °C com tempo de 20 e 40 minutos, com e sem imersão posterior em óleo frio. Foram realizadas comparações com amostras testemunhas a 12% de umidade. Os resultados demonstraram que os fatores de maior efeito do tratamento térmico com óleo de soja sobre as propriedades foram: maior temperatura de tratamento térmico (160 °C); menor espessura inicial (5 mm); maior tempo de tratamento (40 minutos) e imersão em óleo frio após o tratamento térmico. Os efeitos do tratamento térmico associado à imersão em óleo frio resultaram em menores contrações e empenamentos e no aumento dos valores da massa específica.
Palavras-chave
Abstract
This study aimed to evaluate the influence of heat treatment on soybean oil with some physical properties of Pinus sp wood, being evaluated the dimensional variation, density, warping and cracking in samples with 5 mm and 20 mm thicknesses. The samples were submitted to heat treatment at a temperature of 80 °C to 160 °C, for 20 and 40 minutes, with and without subsequent immersion in cold oil. Comparisons were made with control samples, to 12% moisture content. The results demonstrated that the factors of greater effect of the thermal treatment with soybean oil on the properties were: high-temperature heat treatment (160 °C); lower initial thickness (5 mm); longer treatment (40 minutes) and immersion in cold oil after the heat treatment. The effects of the heat treatment associated with immersion in cold oil resulted in lower shrinkage and warp and in the increase in density values.
Keywords
References
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