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07 - COMPÓSITOS POLIÉSTER–MADEIRA: SÍNTESE, CARACTERIZAÇÃO MULTIESCALAR E AVALIAÇÃO DE DESEMPENHO

Doi: 10.47094/978-65-284-0452-0/132-143

PALAVRAS CHAVE: Compósitos poliéster–madeira. Sustentabilidade. Propriedades mecânicas e térmicas.

KEYWORDS: Polyester-wood composites. Sustainability. Mechanical and thermal properties.

ABSTRACT:
The search for sustainable solutions in Northeast Brazil, a region marked by environmental vulnerabilities and intense furniture manufacturing activity, has stimulated the reuse of lignocellulosic waste in the production of new materials. This study presents the synthesis and multiscale characterization of orthophthalic and terephthalic polyester resin composites containing 20% by mass of wood waste from local carpentry workshops, evaluating three distinct particle sizes. The mechanical properties indicated reductions in tensile and flexural strengths compared to the pure matrices, confirming the role of the waste as filler and not as structural reinforcement. The formulation with fine particles showed better performance, associated with greater homogeneity and interfacial adhesion. Density remained stable, and water absorption increased with particle size, reflecting the hydrophilic nature of wood. Thermal properties revealed lower conductivity and higher thermal resistance, suggesting potential for insulation applications in low-cost buildings. SEM analysis showed better wetting in the terephthalic formulations and a greater presence of voids in the orthophthalic ones. After 12 months of environmental exposure, all samples showed a mass loss of less than 2%, demonstrating stability. The polyester-wood composites proved to be a viable and environmentally relevant alternative for the Northeastern context.

Autores

  • Cleiton Rubens Formiga Barbosa

  • Cleiton Rubens Formiga Barbosa Júnior

  • Luan Carvalho Santana de Oliveira

  • Luiz Guilherme Meira de Souza

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