Effects of thermal aging and functionalized epoxy matrix with graphene nanoplates in fique fabric-reinforced composites
Efeitos do envelhecimento térmico e da matriz epóxi funcionalizada com nanoplacas de grafeno em compósitos reforçados com tecido fique
Michelle Souza Oliveira; Fernanda Santos da Luz; Andreza Menezes Lima; Foluke Salgado de Assis; Artur Camposo Pereira; Fábio de Oliveira Braga; Sérgio Neves Monteiro; André Ben-Hur da Silva Figueiredo
Abstract
Currently, the demand for high quality and reliable components and materials is increasing, so bending testing has become a vital test method, both in research and manufacturing and development process, to explain in detail about the material’s ability to withstand deformation under load. This research investigated flexural properties of polymeric composites reinforced with natural fiber, in particular the fique fabric, with addition of graphene nanoplates (GNP) (0.1%; 0.5% and 0.9%) and degradation at high temperature (0, 5 and 10 days), as it was never reported. Using design of experiments (DoE), ie, 3-full factorial design with two replications, aiming to analyze the effects of important parameters, which are exposure time and GNP addition percentage. The output response measurement was identified as deflection at fracture, modulus of rupture and elasticity values. Randomized experiments were conducted based on table generated via Minitab 19 software. Scanning electron microscopy analysis confirmed the main influences on flexural analysis responses.
Keywords
Resumo
Atualmente, a demanda por componentes e materiais de alta qualidade e confiabilidade está aumentando, de modo que os testes de flexão se tornaram um método de teste vital tanto na pesquisa quanto no processo de fabricação e desenvolvimento para explicar em detalhes sobre a capacidade do material de suportar deformação sob carga. Esta pesquisa investigou as propriedades de flexão de compósitos poliméricos de reforço de fibra natural, em especial o tecido de fique, com adição de nanoplacas de grafeno (NPG) (0,1%; 0,5% e 0,9%) e degradação em alta temperatura (0, 5 e 10 dias), uma vez que nunca foi relatado. Usando o planejamento de experimento fatorial (PEF), ou seja, fatorial completo com dois fatores e três níveis com duas repetições, objetivando a análise dos efeitos de parâmetros importantes que são o tempo de exposição e a porcentagem de adição de NPG. A medição da resposta de saída foi identificada como valores de deflexão, resistência à flexão e rigidez. Os experimentos randomizados foram conduzidos com base na tabela gerada via software Minitab 19. Análise de microscopia eletrônica de varredura ratificou as principais influencias nas respostas da análise de flexão.
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Referências
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Submetido em:
27/06/2022
Aceito em:
17/05/2023
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