Relation of transverse air permeability with physical properties in different compositions of sugarcane bagasse particleboards

Abstract

Studies concerning the production of particleboards with sugarcane bagasse as an alternative fibrous material have been carried out as an attempt to provide a sustainable and viable destination for this residue. This work aimed to evaluate the influence of several processing variables related to the microstructure of sugarcane bagasse particleboards (mat type, adhesive type and adhesive content) on their permeability and water sorption properties. Air permeability data was collected by the rotameter method. Superficial air permeability (kg), Darcian constant (k 1 ) and non-Darcian constant (k 2 ) were measured. kg was related to sorption behavior of the particleboards. 1-layer particleboards presented significantly higher kg values than the 3-layer particleboards. In general, adhesive type, position and content did not influence kg of particleboards. However, these processing variables influenced interactions between fluid and material and tortuosity of the porous media. Particleboards produced with urea-formaldehyde with high kg presented higher water absorption and thickness swelling after 24 hours. Such relations were not observed in particleboards produced with melamine-urea-formaldehyde.

Effect of anatomical and chemical structure in the permeability of "Amapá" wood

“…Therefore, the samples were placed on a device, where at one end of the sample a flow meter was connected and, on the other end, suction was applied (BUFALINO et al, 2013;SILVA et al, 2008). The data of air flow, time (minutes) for flow to remain constant and its respective pressure were recorded.…”

Influence of Resin Content and Density on Thickness Swelling of Three-layered Hybrid Particleboard Composed of Sawdust and Acacia mangium

“…Many studies (Hashim et al 1997;Ellis and O'Dell 1999;Uysal 2005) have been carried out to dimensionally stabilize wood to prevent any of the problems associated with shrinkage and swelling; however, their success has been limited. Modifications of wood particles have been studied extensively to increase the water resistance in particleboard production (Bufalino et al 2013;Ngueho Yemele et al 2013). Besides wood particles, researchers also have focused on the development of binders that can help to reduce the hydrophobic nature of the particles.…”

Desenvolvimento e caracterização de painel de partículas homogêneas de bagaço de cana-de-açúcar com reforço têxtil para aplicação em embalagens de transporte de alimentos

“…Em virtude da sua abundância e baixo custo, o bagaço de cana-de-açúcar tem sido considerado por alguns autores, como Bufalino (2013), o substituto mais promissor para a produção de materiais compósitos do tipo painéis particulados (materiais de uso alternativo à madeira), em razão da sua anatomia e características químicas. Segundo informação do setor de vendas da indústria Baldin, localizada em Pirassununga, SP, o valor de mercado do bagaço no ano de 2018 estava em torno de R$ 100,00/t, enquanto o cavaco de madeira custava, em média, R$ 140,00/t.…”

“…Estudos sobre a produção de painéis obtidos a partir de partículas de bagaço de canade-açúcar têm sido realizados na tentativa de promover um destino sustentável e agregar valor a este tipo de subproduto da agroindústria. Estes painéis são produzidos a partir de partículas de bagaço de cana-de-açúcar que são misturadas a uma resina sintética e prensadas a quente por tempo suficiente para que a cura da resina se efetue (BELINI et al 2012;BUFALINO et al, 2013;FIORELLI et al, 2013;MENDES et al, 2010).…”

“…As fibras vegetais são compatíveis com este tipo de resina termorrígida. Elas têm natureza rica em hidroxilas e seus grupos hidroxilas podem reagir com o grupo isocionato do poliuretano (BUFALINO, 2013).…”