Influência Da Adição De Nanopartículas De Al2o3 E Cuo Nas Propriedades Físicas De Painéis Particulados De Madeira

Abstract

O uso de nanopartículas tem ganhado espaço no mercado, principalmente pela capacidade de atribuir novos comportamentos e novas propriedades a diferentes produtos. Assim, o uso de nanopartículas em painéis particulados revela a possibilidade de aprimoramento do desempenho desses, com novas alternativas para suas aplicações. Com isso, este trabalho avaliou a adição de 0,5% de nanopartículas de Al2O3 e CuO em painéis MDP produzidos com ureia-formaldeído e prensados a 150 ºC, verificando a interferência do material adicionado e analisando suas propriedades físicas. Os ensaios físicos analisados foram, inchamento, absorção, densidade e teor de umidade. Os resultados obtidos foram comparados com as normas NBR 14810-2:2018, EN 312:2003 e ANSI 208-1:2009, bem como com trabalhos da literatura, mostrando que a adição das nanopartículas proporciona um pequeno aumento da densidade dos painéis, sem interferência no teor de umidade, indicando também que o desempenho em contato com a água sofre influência da interação adesivo-madeira.

Desempenho físico-mecânico e análise de transferência de calor em painéis OSB com nanopartículas de ZnO

“…A similar phenomenon occurred in the MDP panels studied by Silva, Lima, Campos and Favarim (2021a) with the addition of nanoparticles of copper and aluminum oxides, attributed to the refractory effect. This effect does not allow uniform curing of the resin, since part of the thermal energy does not access the interior of the panel and is retained at the edges, compromising the attainment of the correct curing temperature for the applied time.…”

“…In the forestry sector, the addition of nanoparticles has been studied in wood (Salla;Pandey;Srinivas, 2012;Filpo;Palermo;Rachiele;Nicoletta, 2013), MDF panels (Silva;Ferreira;Silva;Silva;Campos, 2019a), and particleboard panels (Silva;Chahud;Campos, 2019b;Silva;Favarim, 2021a). The addition of nanoparticles to wood panels results in improved mechanical properties, greater dimensional stability, enhanced thermal process efficiency, and an easy and cost-effective implementation (Roumeli;Papadopoulou;Pavlidou;Vourlias;Bikiaris;Paraskevopoulos;Chrissafis, 2012;Silva;Favarim, 2021a). However, very little has been studied about the incorporation of nanoparticles into OSB panels.…”

Influence of the addition of Al2O3 nanoparticles and the duration of pressing on the physical properties of OSB panels

“…3015 Although this type of panel is already prominent in the market, developing a more sustainable and rational material that meets the needs of the industrial segment and guarantees the same durability and characteristics presented by competing materials is essential (Lima et al 2018). Nanoscale materials are a new technological trend that may reveal new behaviors and properties, making nanoparticles a promising material with ease of deployment in this sector (Silva et al 2021). According to Lima et al (2022), the properties and characteristics of the material used on a nanometric scale are defined by the modification caused in the arrangement of atoms and molecules by reducing their size, improving the physical and chemical properties of the material.…”

ZnO nanoparticle as an improvement for particleboard: analysis of physical-mechanical properties and transference of temperature during press

“…Nanomaterials have many surface atoms, which causes an increase in interaction with the environment, where the type and number control of these atoms allow changes in the final properties of nanomaterials, mainly for carrying out reactions (CHOI, 1998;SACUI et al, 2014;SILVA et al 2021;).…”