Particleboards manufactured from Tectona grandis wood waste with homogeneous and three-layer heterogeneous compositions for commercial purposes

Abstract

Tectona grandis wood presents decent dimensional stability as well as highly suitable physical and mechanical properties. These characteristics have encouraged the intense usage of this species, which also includes the reuse of wood processing waste for panel production. Using teak wood waste, this study aims to manufacture and evaluate heat-pressed particleboards at 5 MPa and 100 °C, by being glued with castor oil-based polyurethane resin at proportions of 10% for the homogeneous boards and 12% for the heterogeneous solutions. Single-layer (homogeneous) boards were compared with three-layer particleboard specimens (heterogeneous) having the finer particles in the outer layers. The basic density, moisture content, modulus of rupture and modulus of elasticity in the static bending and perpendicular tensile, water absorption, and thickness swelling after 24 h were evaluated to support this comparative study. All the manufactured particleboards met the standardized requirements of performance, thus being very feasible for usage as non-structural boards. When the two different compositions were analyzed, a considerably better performance of the three-layered particleboards was identified when compared to the homogeneous panels.

Evaluation and production of high-strength wood composite panels with polyethylene terephthalate (PET)

“…Therefore, the closer the pressure temperature is to the melting temperature of the PET (230 °C) better this interaction will be (Chen et al 2006;Rahman et al 2013). The high values found for the CV is explained by the fact that the standard establishes a total of 10 specimens for each test, so its value ends up being too high for certain tests as found by Bispo et al (2022) and De Souza et al (2022b).…”

“…For the regulation of the moisture content, the material was taken to the greenhouse at 103 ± 2 ºC until it reached a moisture content below 3 %. (De Souza et al 2022b). The waste of polyethylene terephthalate (PET) in the form of "flakes", was donated by the company GLOBAL PET SA, São Carlos, Brazil.…”

Produção e avaliação de painéis de partículas com resíduo de Pinus oocarpa aglutinadas com dois tipos de resinas

“…Na busca por alternativas cada vez mais sustentáveis, a utilização desse adesivo para a confecção de painéis aglomerados se tornou objeto de pesquisa de inúmeros autores (NOGUEIRA; LAHR; GIACON, 2018;FIORELLI;BUENO;CABRAL, 2019;NASSER et al, 2020;YANO, 2020;De SOUZA et al, 2022a;De SOUZA et al, 2022b;RODRIGUES et al, 2023). Buzo et al (2019) produziram painéis com partículas de pinus, bagaço de cana-de-açúcar e dois tipos de adesivo: ureia-formaldeído (UF) e poliuretano derivado do óleo de mamona (PUR), ambos na proporção de 10%.…”

“…Da Silva et al (2021) estudaram como forma comparativa a aplicação de três resinas diferentes para painéis, duas PUR provinda de origens diferentes e uma resina UF com duas espécies de madeira sendo a primeira uma mistura de Pinus elliot com Pinus Taeda enquanto a outra foi obtida apenas com uma única espécie com tora de Eucalyptus urograndis produzindo painéis de media e alta densidade com 15% de resina, prensados com 3,5 Mpa a uma temperatura de 2003), com algumas adaptações (De SOUZA et al, 2022a;De SOUZA et al, 2022b;BISPO et al, 2022). Em relação aos adesivos utilizados, a resina poliuretano à base de mamona (PUR) foi adquirida do fabricante Imperveg.…”

Painéis aglomerados com resíduo de Pinus caribaea var. caribaea com adesivo bicomponente sustentável

“…Ambos os painéis foram produzidos com os mesmos parâmetros: a densidade inicial foi adotada com 0,550 g/cm³, com dimensões de 350x350x12 mm, obtendo-se assim um valor de massa total de 810 g para cada tratamento. O adesivo foi dosado em função da massa seca, calculada em cerca de 10% para os painéis homogêneos, conforme recomenda a literatura (IWAKIRI 2005;SOUZA et al, 2022aSOUZA et al, , 2022b.…”