Efecto de la presión de prensado y la adición de lignina kraft en la producción de tableros aglomerados autoenlazados a partir de gynerium sagittatum pretratada con vapor

Giovanna Diossa, Jorge A. Velásquez, Germán C. Quintana, Viviana Gómez

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Gynerium sagittatum is a grass that has great ecological adaptability, which makes it an ideal lignocellulosic source for the manufacture of fiberboards. The effects of pressing pressure and the addition of kraft lignin on the physicomechanical properties of high density fiberboards of Gynerium sagittatum are evaluated. The raw material is pretreated in a steam explosion reactor at severity 4,1. The pressing temperature is set at 217°C. The pressing pressure is varied between 2 and 15 MPa. The most appropriate pressing pressure to obtain a good quality boards is 2 MPa. The values of properties at optimal conditions are: modulus of elasticity 6000 MPa, modulus of rupture 47 MPa, internal bond 1,50 MPa 24 h water absorption 25% and 24 h thickness swelling 15%. Based on these operating conditions, the inclusion of lignin between 0 and 30% is evaluated. The addition of lignin does not significantly affect the mechanical performance of the fiberboards but improve its dimensional stability. The obtained values for 24 h water absorption and 24 h thickness swelling are 19% and 8,5% respectively, at a 20% of lignin addition.

Título traducido de la contribuciónEffects of pressing pressure and kraft lignin addition in the production of binderless fiberboard from steam exploded gynerium sagittatum
Idioma originalEspañol
Páginas (desde-hasta)525-538
Número de páginas14
PublicaciónMaderas: Ciencia y Tecnologia
Volumen19
N.º4
DOI
EstadoPublicada - 2017

Nota bibliográfica

Publisher Copyright:
© 2017

Palabras clave

  • Forest products
  • high density fiberboard
  • natural adhesives
  • natural fibers
  • physico-mechanical properties

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