Produção de compósito plástico-madeira a partir de resíduos da indústria madeireira capixaba
Nenhuma Miniatura disponível
Data
2025-02-12
Autores
Miranda Júnior, Gilson Mendonça de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
This study investigated the production of wood-plastic composites (WPCs) using Eucalyptus sp. residues (ER) from the Capixaba wood industry and poly(vinyl alcohol) (PVA), aiming to evaluate chemical, structural, physical, and mechanical properties, as well as to optimize sustainable formulations. The composites were produced with different proportions of residue (70%, 60%, and 40%) and PVA (30%, 40%, and 60%), along with two particle sizes (35 and 60 mesh). The results indicated that increasing the ER content enhanced the crystallinity and thermal stability of the composites, while PVA improved the adhesion between components. Composites with higher ER content preserved the structural and thermal characteristics of lignin and cellulose, whereas those with higher PVA content exhibited lower thermal stability. The 60% ER and 40% PVA ratio showed the best balance, combining thermal stability, adhesion, and homogeneity. In the physical analyses, composites with higher PVA content showed greater dimensional stability, despite presenting lower apparent density values. The mechanical results highlighted the composites with 60% ER and 40% PVA (T2 and T5) as the most resistant in tensile, compression, flexural, and impact tests. Particle size significantly influenced adhesion and material uniformity, with the 35 mesh size yielding better results compared to the 60 mesh. These findings demonstrate that WPCs are promising for sustainable applications, adding value to waste materials and contributing to the reduction of environmental impacts
Descrição
Palavras-chave
Resíduos , Eucalyptus sp. , Polivinil acetato (PVA) , Compósitos plástico madeira , Indústria madeireira - Espírito Santo (Estado) , Eucalipto - Espírito Santo (Estado) , Materiais , Compostos poliméricos , Resíduos vegetais , Residue , Polyvinyl acetate (PVA) , Wood-plastic composites (WPCs)