Heat transfer and physical-mechanical properties analysis of particleboard produced with ZnO nanoparticles addition

Abstract

The use of particleboards (PB) has increased quickly as an alternative engineered wood product mainly due to its having a better ratio of resistance to weight and more elimination of wood defects, such as the presence of knots. Although the panel industry has been constantly growing, innovations are still necessary to improve the final product. The use of metallic oxide nanoparticles on the wood-based panels has the potential to increase the heat transfer process and improve the physico-mechanical properties. The aim of this work was to evaluate the influence of the addition of zinc oxide (ZnO) nanoparticles in PB, correlating the physical and mechanical properties of the panel with the heat transfer process at 180 °C. The results were compared with the Brazilian standard ABNT NBR 14810-2 (2013) and the European standard EN 312 (2010), as well with works found in literature. The results showed a homogenous heat distribution during the pressing, which improved physical properties, decreasing the 24h swelling from 22.2% to 14.9% and the 24 h absorption from 30.29% to 21.0%. Besides that, MOR values was increased from 11.3 MPa to 14.5 MPa and the MOE from 1880 MPa to 2510 MPa.

Análise do efeito da incorporação de nanopartículas de ZnO nas propriedades físicas e mecânicas de painéis MDF

“…Estudo realizado por Silva, L. et al (2019) revela ainda que a adição de nanopartículas nos painéis pode auxiliar na transferência de calor durante o processo de prensagem, o que melhora a cura do adesivo devido ao aumento da velocidade de transferência de calor, verificado com o uso de termopares inseridos no colchão de partículas durante a prensagem, melhorando consequentemente, as propriedades físico-mecânicas do painel.…”

“…Ressalta-se ainda que o ZnO foi escolhido para a presente pesquisa devido a sua capacidade de produção por método menos agressivo (sol-gel-proteico), além de sua alta condutividade térmica, se comparada aos demais óxidos, o que pode trazer benefícios durante o processo de prensagem dos painéis particulados (SILVA, L. et al, 2019).…”

Highly dispersed manganese dioxide nanoparticles anchored on diatomite surface by sol–gel method and its performance on soybean meal‐based adhesive

“…11,12 Meanwhile, nanoparticles have been found as a promising material to optimize adhesive performance, due to their surface effect, small dimension effect, and high particle aspect ratio. 1,13 In recent years, metallic oxide nanoparticles have been used in the wood-based panels industry, for example, aluminum oxide 14 and zinc oxide 15 nanoparticles were used to improve the physic-mechanical properties as well as the heat transfer of the panels. Regarding the physic-mechanical properties of panels, new probabilities have arisen with the use of metal nanoparticles.…”

Effect of Iron Oxide Nanoparticles on the Physical Properties of Medium Density Fiberboard

“…These results are explained by the lower compression of the board due to the faster treatment of the adhesive using a higher percentage of ZnO nanoparticles. The best treatment for nanocomposite panel was with melamine-formaldehyde resin and 0.5% nanoparticles [30]. Alabduljabbar, H et al (2020) explored the effect of Al 2 O 3 nanoparticles on the physical and mechanical properties of nano-MDF.…”