ESTUDO DO EFEITO DA ADIÇÃO DE DIFERENTES TEORES DE ARGILAS MONTMORILONITA E MICA MUSCOVITA NO COMPORTAMENTO PROTETIVO DE TINTAS EM PÓ BASE EPÓXI NA APLICADAS SOBRE AÇO AISI 1008
STUDY OF THE EFFECT OF THE ADDITION OF DIFFERENT LEVELS OF MONTMORILLONITE AND MICA MUSCOVITE CLAYS ON THE PROTECTIVE BEHAVIOR OF EPOXY BASE POWDER PAINTS APPLIED ON AISI 1008 STEEL
Patrícia da Costa Ferreira, Lilian Vanessa Rossa Beltrami, Diego Piazza, Sandra Raquel Kunst, Ademir Jozé Zattera
Resumo
O presente trabalho apresenta a elaboração de nanocompósitos poliméricos de tinta em pó, à base de resina epoxídica e diferentes teores de argilas montmorilonita e mica muscovita. Os nanocompósitos foram obtidos no estado fundido em extrusora duplarrosca co-rotante e foram analisados por ensaios de aderência, perfilometria, ângulo de contato, espectroscopia de impedância eletroquímica e névoa salina. Os resultados indicam que a rugosidade superficial aumentou com o aumento das concentrações de argilas. Em geral a grande maioria das amostras com argilas apresentaram melhora nas propriedades protetivas, quando comparadas com as amostras sem adição de argila.
Palavras-chave
Abstract
The present work presents the elaboration of polymer nanocomposites of powder paint, based on epoxy resin and different levels of montmorillonite and muscovite mica clays. The nanocomposites were obtained in the molten state in a co-rotating double-screw extruder. The nanocomposites properties were analyzed by adhesion, profilometry, contact angle, electrochemical impedance spectroscopy and salt fog tests. The results indicate that the surface roughness increased with increasing concentrations of clays. In general, the majority of samples with clays showed improvement in the protective properties when compared to the samples without addition of clay.
Keywords
Referências
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