Abstract
This paper discusses the potential use of sugarcane bagasse in two different fiber lengths (5 mm and 8 mm) of the same density as a raw material for the production of particleboards, using castor oil-based two-component polyurethane adhesive. The quality of the product that can be manufactured industrially was evaluated based on density, thickness swell (TS), absorption (WA), modulus of elasticity (MOE), modulus of rupture (MOR) in static bending and internal bond (IB), according to the Brazilian NBR 14.810:2006 standard. The results revealed a significant difference between the particleboards made with 5-mm-long fibers and those made with 8-mm-long fibers. An analysis by scanning electron microscopy (SEM) indicates that the interparticle spaces are filled with castor oil-based two-component polyurethane adhesive, contributing to improve the physicomechanical properties of the particleboards. A durability assessment based on accelerated aging tests shows that waterproofed particleboards can be used in moist environments.
Highlights
A proposed alternative destination for agricultural wastes is to use them for the manufacture of particulate composites, or particleboards
This paper evaluates the feasibility of producing particleboards made of sugarcane bagasse particles with two different fiber lengths (5 mm and 8 mm) and a density of 1.0 g.cm–3, as well as the efficiency of these particleboards manufactured with castor oil polyurethane adhesive
The particleboards produced with 5 mm fibers (T1) showed higher water absorption than those prepared with 8 mm fibers (T2)
Summary
A proposed alternative destination for agricultural wastes is to use them for the manufacture of particulate composites, or particleboards These particleboards are usually manufactured from wood particles bound together with synthetic adhesives or other binders, which are pressed under heat until the adhesive has cured[1]. These particleboards can be made of any lignocellulosic material that gives them high strength and a predetermined specific weight, since the chemical composition of lignocellulosic materials is similar to that of wood, especially hardwoods which have lower lignin content and higher pentose hemicellulose content[2,3,4,5,6,7,8,9,10,20,21,23,24]. Brazil’s sugarcane production has expanded considerably, in the state of São Paulo. In 2010, São Paulo harvested a record crop of 360 MT of sugarcane, an 8.4% increase over the preceding crop
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