Journal of Materials Science

, Volume 50, Issue 3, pp 1082–1093 | Cite as

Mechanical properties and thermal conductivity of graphene nanoplatelet/epoxy composites

  • Fuzhong Wang
  • Lawrence T. Drzal
  • Yan Qin
  • Zhixiong Huang
Original Paper

Abstract

Nanocomposites of epoxy with 3 and 5 wt% graphene nanoplatelets (GnPs) were fabricated with GnP sizes of ~5 and <1 μm dispersed within an epoxy resin using a sonication process followed by three-roll milling. The morphology, mechanical, and thermal properties of the composites were investigated. Tensile and flexural properties measurements of these nanocomposites indicated higher modulus and strength with increasing concentration of small GnPs sizes (<1 μm, GnP-C750). The incorporation of larger GnPs sizes (~5 μm, GnP-5) significantly improved the tensile and flexural modulus but reduced the strength of the resulting composites. At 35 °C, the dynamic storage modulus of GnP-5/epoxy composites increased with increasing platelet concentration, and improved by 12 % at 3 wt% and 23 % at 5 wt%. The smaller GnP-C750 increased the storage modulus by 5 % at 3 wt% loading but only 2 % at 5 wt% loading. The glass transition temperatures of the composites increased with increasing platelet concentration regardless of the GnP particle size. A marked improvement in thermal conductivity was measured with the incorporation of the larger GnP size reaching 115 % at 5 wt% loading. The effects of different platelet sizes of the GnP reinforcement on the damage mechanisms of these nanocomposites were studied by scanning electron microscopy.

Keywords

Epoxy Storage Modulus Dynamic Mechanical Analysis Epoxy Matrix Epoxy Composite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The work was financially supported by the China Scholarship Council (CSC) and the Composite Materials and Structures Center (CMSC) at Michigan State University.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Fuzhong Wang
    • 1
    • 2
  • Lawrence T. Drzal
    • 2
  • Yan Qin
    • 1
  • Zhixiong Huang
    • 1
  1. 1.School of Material Science and EngineeringWuhan University of TechnologyWuhanChina
  2. 2.Chemical Engineering and Materials Science, Composite Materials and Structures CenterMichigan State UniversityEast LansingUSA

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