Artigo Acesso aberto Produção Nacional Revisado por pares

Glass fiber hybrid composites molded by RTM using a dispersion of carbon nanotubes/clay in epoxy

2013; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 16; Issue: 5 Linguagem: Inglês

10.1590/s1516-14392013005000104

ISSN

1980-5373

Autores

Tarcísio Sanson Sene, Laís V. da Silva, Sandro Campos Amico, Daniela Becker, Alejandro Manzano Ramírez, Luiz Antônio Ferreira Coelho,

Tópico(s)

Carbon Nanotubes in Composites

Resumo

Nanocomposites based on epoxy and a mixture of clays and multi-walled carbon nanotubes (MWCNT) were produced by casting, and also molded by RTM using glass fibers as reinforcement, yielding a hybrid multi-scale micro/nanocomposite material. Two types of montmorillonite clays were used, natural (MMT-Na) and organophilic (MMT-30B). Higher viscosity was obtained for the mixture with MMT-30B and it was observed that this clay did not perform as well as the MMT-Na in helping the dispersion of the carbon nanotubes (CNT). The glass transition temperature (Tg) of the nanocomposites increased in up to 6 °C with the addition of MWCNT and up to 10 °C with the addition of MMT-30B, differently from the MMT-Na which did not alter the Tg of the material. By transmission electron microscopy, it was verified that more homogeneous dispersions and more intercalated structures were obtained with the MMT-30B than with the MMT-Na. Finally, the low clay content used and, especially, the very low MWCNT content, did not significantly alter the studied flexural properties.

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