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

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.