Caracterização da madeira de paricá (Schyzolobium amazonicum Huber ex. Ducke) e propriedades de chapas de partículas aglomeradas com diferentes proporções de fibras de coco (Cocos nucifera L.)

• Autor(a) principal: Colli, Andréia
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3178
• topic: Paricá; Madeira aglomerada; Propriedades; Fibras de coco; Schyzolobium amazonicum; Cocos nucifera; Paricá wood; Particleboards; Properties; Coconut fibers; Schyzolobium amazonicum; Cocos nucifera; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS

This research had as objective to determinate the saturation moisture content, specific mass and dimensional stability of the paricá wood (Schyzolobium amazonicum Huber. former Ducke) at tree ages of 5, 7, 9 and 11 years, as affected by radial and longitudinal positions in the trunk as well as wood pH and buffering capacity Was also determined the properties of particleboards manufactured with particles of paricá wood and increasing proportions of coconut fibers (Coconuts nucifera L.). Boards were fabricated with 6 or 8% of urea-formaldehyde adhesive. It was observed that the paricá is a low density wood (280 Kg/m3). As the age increased was observed reduction in the saturation moisture contend, increase in the specific mass, retraction and swelling. In the radial direction wood close of the bark presents larger density while the wood close to the pith had larger retraction, swelling and volumetric variation. At higher positions in the trees it was observed smaller density, retraction and swelling in the radial direction and larger retraction and swelling in the tangential direction. The pH of the wood was of 4,88 and of the fibers of coconut 5,7, both with low capacity lid. Particleboard mean density was iqual to 360Kg/m3. The addition of coconut fibers didn't influence boards physical properties. However it increased its mechanical properties. The addition of 8% of adhesive improved all board properties.