Thermal Conductivity Enhancement of Graphene Epoxy Nanocomposite

Abstract:

Graphene was introduced in the epoxy matrix for the enhancement of thermal conductivity properties. Dispersion is a crucial step in nanocomposite processing. Therefore, it is important to tackle the issues and homogenously dispersed the graphene in the epoxy matrix. In this paper, we varied the stirring speed in order to understand its effects on enhancing the thermal conductivity values of the composites. Results show that the thermal conductivity increases up to 17.5% with the 1.5% weight loading of graphene that was stirred at 1500 rpm stirring speed. The experiment results are then compared to theoretical calculation by Maxwell model. Study implied that Maxwell model can predict the thermal conductivity of composites because it applies only for small volume fraction of filler. As the filler loading used in this study only up to 1.5 wt. %, Maxwell model was suitable to be used.

• Periodical: Key Engineering Materials (Volume 701)
• Pages: 13-17
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.701.13
• Online since: July 2016
• Authors: Amal Izzati Ismadi, Ku Zarina Ku Ahmad, Norazrina Norazrina, Kin Yuen Leong, Raja Nor Izawati Raja Othman*
• Keywords: Epoxy, Graphene, Nanocomposite, Stirring Speed, Thermal Conductivity

References

[1] H. Karamitaheri, N. Neophytou, M. Pourfath, and H. Kosina, Study of thermal properties ofgraphene-based structures using the force constant method, J. Comput. Electron., vol. 11, no. 1, p.14–21, (2012).

DOI: 10.1007/s10825-011-0380-9

[2] T. Zhou, X. Wang, P. Cheng, T. Wang, D. Xiong, and X. Wang, Improving the thermal conductivity of epoxy resin by the addition of a mixture of graphite nanoplatelets and silicon carbide microparticles, Express Polym. Lett., vol. 7, no. 7, p.585–594, (2013).

DOI: 10.3144/expresspolymlett.2013.56

[3] Y. J. Wan, L. C. Tang, D. Yan, L. Zhao, Y. B. Li, L. Bin Wu, J. X. Jiang, and G. Q. Lai, Improved dispersion and interface in the graphene/epoxy composites via a facile surfactant-assisted process, Compos. Sci. Technol., vol. 82, p.60–68, (2013).

DOI: 10.1016/j.compscitech.2013.04.009

[4] M. Martin-Gallego, R. Verdejo, M. Khayet, J. de Zarate, M. Essalhi, and M. Lopez-Manchado, Thermal conductivity of carbon nanotubes and graphene in epoxy nanofluids and nanocomposites, Nanoscale Res. Lett., vol. 6, no. 1, p.610, (2011).

DOI: 10.1186/1556-276x-6-610

[5] F. Wang, L. T. Drzal, Y. Qin, and Z. Huang, Mechanical properties and thermal conductivity of graphene nanoplatelet/epoxy composites, J. Mater. Sci., vol. 50, no. 3, p.1082–1093, (2014).

DOI: 10.1007/s10853-014-8665-6

[6] Y. -X. Fu, Z. -X. He, D. -C. Mo, and S. -S. Lu, Thermal conductivity enhancement of epoxy adhesive using graphene sheets as additives, Int. J. Therm. Sci., vol. 86, p.276–283, (2014).

DOI: 10.1016/j.ijthermalsci.2014.07.011

[7] M. a. Raza, a. V. K. Westwood, and C. Stirling, Effect of processing technique on the transport and mechanical properties of graphite nanoplatelet/rubbery epoxy composites for thermal interface applications, Mater. Chem. Phys., vol. 132, no. 1, p.63–73, (2012).

DOI: 10.1016/j.matchemphys.2011.10.052

[8] M. R. Zakaria, H. M. Akil, M. H. A. Kudus, and S. S. M. Saleh, Enhancement of tensile and thermal properties of epoxy nanocomposites through chemical hybridization of carbon nanotubes and alumina, Compos. Part A Appl. Sci. Manuf., vol. 66, p.109–116, (2014).

DOI: 10.1016/j.compositesa.2014.07.008