Nadia A. Ali, Alaa M. Abd-Elnaiem*, Seenaa I. Hussein, Asmaa Sh. Khalil, Hatem R. Alamri and Hasan S. Assaedi Pages 1 - 9 ( 9 )
Objective: In this work, graphene (Gr) or/and Cu particles are used to improve the thermal and mechanical properties of epoxy resin.
Methods: Various contents of Gr powder (0.1, 0.3, and 0.5 wt%), Cu powder (10, 30, and 50 wt%) were loaded to epoxy to form Gr/epoxy and Cu/epoxy composites, respectively. In addition, hybrids epoxy/Cu/Gr samples were prepared with a selection of lowest (0.1 and 10) and highest (0.5 and 50) ratios of Gr, and Cu, respectively.
Results: The thermal conductivity increases with the increasing weight ratio of Gr and Cu as compared to the pure epoxy. The Thermogravimetric analysis (TGA) of epoxy composites and hybrid composites reveals an improvement in the thermal stability. In addition, the mechanical properties such as hardness shore D and the wear resistance are enhanced for both the epoxy composites and hybrids composites. However, the Ep+0.5wt%Gr+50wt%Cu hybrid composite has the maximum hardness 84, thermal conductivity of 3.84 W/m.K, it shows the lowest wear resistance 2.7×10-6 mm3/Nm at loading 10 N.
Conclusion: The hybrid composite containing 0.5wt%Gr and 50wt%Cu shows the maximum hardness and thermal conductivity, as well as the lowest wear resistance when compared to other composites. The physical properties of the hybrid composite can be controlled by the host blend, and hence the morphology, and interfacial characteristics.
Epoxy, graphene, Cu, thermal conductivity, hardness, wear rate
Department of Physics, College of Science, University of Baghdad, Physics Department, Faculty of Science, Assiut University, Assiut 71516, Department of Physics, College of Science, University of Baghdad, Department of Physics, College of Science, University of Baghdad, Department of Physics, Al Jumum University College, Umm Al-Qura University, P.O. Box 715, Makkah 21955, Department of Physics, Al Jumum University College, Umm Al-Qura University, P.O. Box 715, Makkah 21955