Thermal Modification of Sugarcane Waste and Bamboo Particles for the Manufacture of Particleboards

Abstract

The thermal modification of particles of the paticleboards constituted of agroforest and industrial waste can improves the dimensional stability (thickness variation) and reduces the use of chemicals that can raise the costs of the process or be hazardous to humans and the environment. This study evaluated the effect of the thermal modification on the physical-mechanical properties and density profile of particleboards manufactured from sugarcane bagasse and bamboo (Dendrocalamus asper) (Schult f.) Backer ex Heyne). A mixture of 75% bamboo particles and 25% sugarcane bagasse was subjected to 220 °C temperature for 201 min. Urea-formaldehyde (UF)-based adhesive with three solids contents (10, 12 and 14%) based on the dry mass of the particles was used for the aggregation of the materials. Both temperature and increases in the adhesive content improved their dimensional stability, however, the thermal treatment reduced the mechanical properties. The particleboards composed of treated particles did not meet the minimum specifications established by the Brazilian norm utilized. The densitometric profiles were negatively influenced by the thermal modification and improved by the increase in adhesive content.

Potencial de utilização de resíduos da cultura de soja tratados com água e hidróxido de sódio para produção de painéis aglomerados

“…Pesquisadores vêm mostrando a viabilidade do emprego de resíduos agroindustriais, associados ou não a madeira, que possuem uso potencial, tais como: palha de milho, resíduo de sorgo, resíduos de coco de babaçu, espiga de milho, casca de arroz, bambu e bagaço de cana de açúcar, dentre outros (Silva et al, 2015;Guimarães Júnior et al, 2016, Machado et al, Research, Society and Development, v. 11, n. 2, e29511225762, 2022 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v11i2.25762 3 2017, Scatolino et al, 2017;César et al, 2017, Bazzetto et al, 2019, Brito & Bortoletto júnior, 2019.…”

Wettability and decay of particleboards manufactured with thermally treated sugarcane residue and bamboo (Dendrocalamus asper) particles

“…The heat treatment process was similar to described by Brito and Bortoletto Júnior (2019). The particles were dried in an oven (≈ 3% moisture) and placed into containers made of wire mesh with dimensions of 13 cm x 18 cm x 58 cm (height x width x length), which were previously lined with aluminum foil (Figure 1).…”

“…Some researchers have already worked with thermally modified particles from alternative materials such as sugarcane bagasse and bamboo, and noticed the color change after heat treatment; for example; Zhang et al 2013, Zhang et al 2017, Lee et al (2018, Brito andBortoletto Júnior (2019), andBrito et al (2020a).…”

“…Wood or other lignocellulosic materials (sugarcane bagasse and bamboo) can be used for producing particleboards when they are transformed into particles. However, few experiments have been carried out with particleboards made from thermally modified sugarcane bagasse and bamboo particles; rare examples are those mentioned by Brito and Bortoletto Júnior (2019) and Ribeiro et al (2020), mainly in relation to technological properties, biological resistance and wettability. Thus, this study had the objective to evaluate the effect of thermal modification on the chemical composition of the particles, wettability and biological resistance of particleboards made from sugarcane bagasse and bamboo (Dendrocalamus asper).…”

Technological Properties of Medium Density Particleboards Produced with Peanut (Arachis Hypogaea) and Pinus Oocarpa Hulls

“…This statement is consistent with the behaviour of the panels observed in the present research. The dimensional stability of particleboards can be improved by increasing the adhesive content or applying some type of treatment to the particles, such as heat treatment (Brito & Bortoletto Júnior, 2019). The use of paraffin emulsion is also mentioned, which tends to give greater dimensional stability to the panels.…”