Características da cor da madeira de pinus afetada por compressão térmica
DOI:
https://doi.org/10.5902/198050989291Palavras-chave:
heat treatment, thermal compressing, pine wood, wood colourResumo
http://dx.doi.org/10.5902/198050989291
O objetivo deste estudo foi determinar os efeitos das modificações térmicas e prensagem a quente sobre as características de cor de madeira de pinus como bio-recursos. As tábuas de madeira com dimensões de 250 mm de largura por 500 mm de comprimento por 18 mm de espessura foram comprimidas termicamente a uma temperatura de 120 ºC ou 150 ºC, a pressão de 5 ou 7 MPa durante 60 min em uma prensa quente. Os resultados obtidos neste estudo mostraram que as características de cor das amostras de madeira de pinus foram afetadas pela pressão e temperatura da prensa. A exsudação da resina aumentou significativamente as coordenadas cromáticas (a * - b * e 25,99 – 43,18) das amostras de madeira tratada. Compressão térmica causa escurecimento na cor da madeira, o que aumenta em condições de pressão e alta temperatura.
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