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Authors
Abstract(s)
Atualmente, a utilização dos materiais compósitos tem crescido significativamente devido à sua ótima razão resistência/peso, gerando a necessidade de se produzir materiais mais sustentáveis nesse campo. Este estudo teve como objetivo a fabricação e caracterização de um material compósito sustentável, utilizando fibras de coco e resina Greenpoxy. Foram analisadas as propriedades mecânicas sob tração e flexão, além da influência do tratamento químico superficial de mercerização nas fibras e da fração volumétrica de fibras sobre as propriedades finais do compósito. A caracterização das fibras de coco revelou que o tratamento das fibras ocasionou em uma pequena redução das propriedades mecânicas da fibra. Para a resina, os
ensaios refletiram resultados satisfatórios e coerentes. Já para os compósitos, fabricados contendo 3% e 6% de fração volumétrica com fibras tratadas e não tratadas, os ensaios indicam que, para baixos níveis de fração volumétrica, o tratamento de mercerização não teve efeito significativo, mas para níveis mais altos, indicou propriedades mecânicas superiores, indicando que o tratamento gerou melhoria na adesão entre fibra e a matriz. Em conclusão, o tratamento de mercerização nas fibras de coco melhorou significativamente a aderência entre as interfaces fibra-matriz, especialmente em frações volumétricas mais altas, comprovando sua eficácia na melhoria das propriedades finais do compósito reforçado com fibras naturais.
The use of composite materials has grown significantly in recent times due to their excellent strength-to-weight ratio, creating a need for more sustainable materials in this field. The goal of this study is to manufacture and characterize a sustainable composite material using coir fibers and Greenpoxy resin. The mechanical properties under tensile and flexural loads were analyzed, along with the influence of mercerization surface treatment on the fibers and the effect of fiber volume fraction on the final composite properties. The characterization of coir fibers revealed that fiber treatment caused a slight reduction on fibers’ mechanical properties. For the resin, the tests reflected satisfactory and consistent results. For the composites, fabricated with 3% and 6% volume fractions of treated and untreated fibers, the tests indicated that at low volume fractions the mercerization treatment had no significant effect, but at higher levels, it indicated superior mechanical properties, suggesting that the treatment improved the adhesion between the fiber and the matrix. In conclusion, the mercerization treatment on coir fibers significantly improved the adhesion between the fiber-matrix interfaces, especially at higher volume fractions, proving its effectiveness in enhancing the final properties of the natural fiber-reinforced composite.
The use of composite materials has grown significantly in recent times due to their excellent strength-to-weight ratio, creating a need for more sustainable materials in this field. The goal of this study is to manufacture and characterize a sustainable composite material using coir fibers and Greenpoxy resin. The mechanical properties under tensile and flexural loads were analyzed, along with the influence of mercerization surface treatment on the fibers and the effect of fiber volume fraction on the final composite properties. The characterization of coir fibers revealed that fiber treatment caused a slight reduction on fibers’ mechanical properties. For the resin, the tests reflected satisfactory and consistent results. For the composites, fabricated with 3% and 6% volume fractions of treated and untreated fibers, the tests indicated that at low volume fractions the mercerization treatment had no significant effect, but at higher levels, it indicated superior mechanical properties, suggesting that the treatment improved the adhesion between the fiber and the matrix. In conclusion, the mercerization treatment on coir fibers significantly improved the adhesion between the fiber-matrix interfaces, especially at higher volume fractions, proving its effectiveness in enhancing the final properties of the natural fiber-reinforced composite.
Description
Mestrado de dupla diplomação com o Centro Federal de Educação Tecnológica de Minas Gerais – CEFET
Keywords
Mercerização Fibras de coco Greenpoxy Compósito sustentável