Abstract

GRANERO, V. et al. Incidence of particle size distribution in peanut husks bonded panels. Quebracho (Santiago del Estero) [online]. 2013, vol.21, n.2, pp.67-80. ISSN 1851-3026.

The purpose of this stage was to determine the influence of particle size and shape of peanut husks on the properties of panels made with urea resin. Panels were made with milled husks (r: 200 Kg/m³) and unmilled husks (r: 81 Kg/m³) and two combinations thereof. The results showed that the panels made with milled husks improved physical and mechanical properties with respect to the panels that incorporated unmilled particles. The density values in panels with milled particles were 628.67 Kg / m³; water absorption 65.3% and 79.75% at 2 and 24 hours respectively, and swelling of 9.9% and 14.35% measured at 2 and 24 hours respectively. Regarding the characterization of mechanical properties of bending, the values recorded in samples prepared with fine particles of peanut husks resulted in MOR: 3.58 MPa, LOP 2.26 MPa and MOE 627 MPa. With respect to toughness, the highest value was observed in particle boards made from unmilled peanut husks: 1.58MPa. The characterized properties are still below the properties of commercial wood panels. Adjustments to the process of preparing the peanut husks plates will be incorporated in future experiences.

Keywords : Lignocellulosic waste; Peanut husks; Particle size; Lingo cellulosic panels.

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