Technological characterization of particleboards constituted with pistachio shell (Pistacia vera) and Pinus oocarpa wood

Abstract

The objective of this work was to produce and characterize particleboards manufactured with pine wood and pistachio shell. Three mix proportions of 25, 50 and 75% were used, and for the control, panels manufactured with 100% pistachio shell were adopted. The panels were produced with a nominal density of 0.75 g cm -3 . The properties analyzed were: apparent density, water absorption, thickness swelling, modulus of rupture, modulus of elasticity and perpendicular traction. The chemical characterization of the particles showed that the extractives content of pistachio was higher than the content obtained for pine wood. There was no significant difference for physical properties and all values obtained for IE 24 h, of panels composed of a mixture of particles (T1, T2 and T3) were contemplated by the Brazilian standard. Significant differences were found for mechanical properties, as well as a decrease in strength. The MOR of the panels made up of 25% pistachio and 75% pine wood showed a satisfactory value, as the standard requires a minimum value of 11.00 MPa and the panels reached an average value of 11.38 MPa. For perpendicular traction, the T1 and T2 treatment panels met the standard requirement, reaching values above 0.35 Mpa.

By-Products of the Timber Industries as Raw-Material for the Production of MDP (Medium Density Particleboard)

“…In other studies, this variation in density in relation to the panel nominal density was also found and was attributed the loss of inputs (adhesive, paraffin and particles) during the panel manual production, as well the volume increase of the panels after hot pressing and packaging (BRITO et al, 2021;BAZZETTO et al, 2019;GUIMARÃES JÚNIOR et al, 2016). There was a difference in the thickness of the panels caused by a return in relation to the nominal thickness of the limiting bars.…”

Utilization of nanotalc modified adhesives in plywood panels

“…who reported an average of 6,18 % andBrito et al (2021) who obtained an average of 6,34 %. The higher value is considered ideal, because the lignin contributes to the adhesion mechanisms and may contribute to the bonding process of the panels.Regarding the ash,Santos et al (2022) have found a content of 1,20 % close to the present study.…”