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Mechanical and dynamic-mechanical properties of silanized graphene oxide/epoxy composites

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Abstract

Epoxy resins are widely used thermosets due to their excellent mechanical properties, but their highly cross-linked network hinders their impact absorption ability and limited fracture toughness. Aiming to improve those characteristics, graphene oxide has emerged as a potential nanofiller for epoxy, and additional gain can be achieved with its functionalization. This study focuses on the influence of the GO treatment with 3-aminopropyltriethoxysilane (APTES) on the viscosity, curing behavior, cross-link density and mechanical and dynamic-mechanical properties of GO/epoxy nanocomposites. At only 0.10 wt% of GO, cross-link density and heat of reaction were reduced, and the glass transition temperature increased by 7 °C in comparison to the neat resin. Additionally, the plane-strain fracture toughness increased for 0.10 wt% GO and for all APTES treated GO, which represents an advantage in the large-scale use of epoxy composites.

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Acknowledgements

The authors would like to thank CAPES and CNPq for the financial support, and the Surface Analysis Laboratory (LAMAS - UFRGS) for the XPS analysis.

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Authors and Affiliations

  1. Postgraduate Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500, Porto Alegre, RS, 91501-970, Brazil

    Alessandra Lavoratti & Sandro Campos Amico

  2. Postgraduate Program in Engineering of Processes and Technologies (PGEPROTEC), Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas, 1130, Caxias do Sul, RS, 95070-560, Brazil

    Ademir José Zattera

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  1. Alessandra Lavoratti
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  2. Ademir José Zattera
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  3. Sandro Campos Amico
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Correspondence to Alessandra Lavoratti.

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Lavoratti, A., Zattera, A.J. & Amico, S.C. Mechanical and dynamic-mechanical properties of silanized graphene oxide/epoxy composites. J Polym Res 26, 140 (2019). https://doi.org/10.1007/s10965-019-1805-6

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