Particleboards with peanut husks and castor oil polyurethane adhesive

GATANI, MARIANA; GRANERO, VICTORIA; FIORELLI, JULIANO; SAVASTANO JUNIOR, HOLMER

NONCONVENTIONAL BUILDING MATERIALS BASED ON AGRO-INDUSTRIAL WASTES

Universidad de San Pablo

Lugar: San Carlos; Año: 2015; p. 279 - 298

Peanut husks are an abundant waste into the agricultural field, which can be used as raw material for new products. This article analyzes the physical and mechanical properties of low and medium density panels (0.6 g/cm3 and 0.75 g/cm3) made of peanut husks and two different types of resin: urea formaldehyde and castor oil polyurethane. Brazilian standard NBR 14810:2006 was used to determine and evaluate density, water absorption and swelling, modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond (IB). A satisfactory behavior was observed in medium density panels prepared with castor oil adhesive, reaching density values of 0.71 g/cm3, water absorption percentages of 50.66% at 2 h and 95.11% at 24 h, swelling percentages of 14.67% at 2 h and 21.79% at 24 h, MOR and MOE values of 7.61 MPa, and 1069.5 MPa respectively and IB values of 3.5 MPa. Moreover, analysis of the components by SEM (Scanning Electron Microscopy) showed that low density panels has low compaction, which is likely the cause of the least resistance of these panels.