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Properties of graphite/epoxy composites: the in-plane conductivity, tensile strength and Shore hardness

Department of Mechanical Engineering, Universitas Bung Hatta, 25143 Padang, West Sumatera, Indonesia

Graphite/epoxy composites have the potential to be used as conductive polymer composites (CPCs). Nevertheles, graphite/epoxy composites have a low in-plane conductivity, so a large amount of conductive filler is needed to increase the in-plane conductivity. However, other composite properties can be affected if the conductive filler content is too high. The casting method was used to produce graphite/epoxy composites in this study. Graphite was added to an epoxy resin at various weight percentage (wt%), curing times, and curing temperatures. The result show that a graphite/epoxy composite with 80 wt% of graphite at curing temperature of 130 ℃ and a curing time of 120 minutes produce the highest in-plane conductivity and shore hardness of 28 S/cm and 94.88 SHD, respectively. In contrast, the highest tensile strength of the graphite/epoxy composite (18.5 N/mm2) was obtained with 65 wt% of conductive filler material, the lowest amount considered in this study. This is due to the reduced ability of epoxy resins to bind to higher amounts of conductive fillers (e.g., 80 wt%).
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Keywords conductive polymer composites; in-plane conductivity; tensile strength; Shore hardness

Citation: Hendra Suherman, Yovial Mahyoedin, Edi Septe, Roni Rizade. Properties of graphite/epoxy composites: the in-plane conductivity, tensile strength and Shore hardness. AIMS Materials Science, 2019, 6(2): 165-173. doi: 10.3934/matersci.2019.2.165


  • 1. Ma PC, Liu MY, Zhang H, et al. (2009) Enhanced electrical conductivity of nanocomposites containing hybrid fillers of carbon nanotubes and carbon black. ACS Appl Mater Inter 1: 1090–1096.    
  • 2. Suherman H, Sulung AB, Sahari J (2013) Effect of the compression molding parameters on the in-plane and through-plane conductivity of carbon nanotubes/graphite/epoxy nanocomposites as bipolar plate material for a polymer electrolyte membrane fuel cell. Ceram Int 39: 1277–1284.    
  • 3. Bairan A, Selamat MZ, Sahadan SN, et al. (2016) Effect of carbon nanotubes loading in multifiller polymer composite as bipolar plate for PEM fuel cell. Procedia Chem 19: 91–97.    
  • 4. Mathur RB, Dhakate SR, Gupta DK, et al. (2008) Effect of different carbon fillers on the properties of graphite composite bipolar plate. J Mater Process Technol 203: 184–192.    
  • 5. Li Y, Jing T, Xu G, et al. (2018) 3-D magnetic graphene oxide-magnetite poly(vinyl alcohol) nanocomposite substrates for immobilizing enzyme. Polymer 149: 13–22.    
  • 6. Zhang Y, Rhee KY, Park SJ (2017) Nanodiamond nanocluster-decorated graphene oxide/epoxy nanocomposites with enhanced mechanical behavior and thermal stability. Compos Part B-Eng 114: 111–120.    
  • 7. Zhao ZY, Misra RDK, Bai PK, et al. (2018) Novel process of coating Al on graphene involving organic aluminum accompanying microstructure evolution. Mater Lett 232: 202–205.    
  • 8. Zhang Y, Qian L, Zhao W, et al. (2018) Highly efficient Fe-N-C nanoparticles modified porous graphene composites for oxygen reduction reaction. J Electrochem Soc 165: H510–H516.    
  • 9. Wang Z, Wei R, Gu J, et al. (2018) Ultralight, highly compressible and fire-retardant graphene aerogel with self-adjustable electromagnetic wave absorption. Carbon 139: 1126–1135.    
  • 10. Zhang Y, Choi JR, Park SJ (2018) Interlayer polymerization in amine-terminated macromolecular chain-grafted expanded graphite for fabricating highly thermal conductive and physically strong thermoset composites for thermal management applications. Compos Part A-Appl S 109: 498–506.    
  • 11. Zhang Y, Rhee KY, Hui D, et al. (2018) A critical review of nanodiamond based nanocomposites: Synthesis, properties and applications. Compos Part B-Eng 143: 19–27.    
  • 12. Hui C, Hong-Bo L, Li Y, et al. (2010) Study on the preperation properties of novolac epoxy/graphite composite bipolar plate for PEMFC. Int J Hydrogen Energ 35: 3105–3109.    
  • 13. Jing X, Zhao W, Lan L (2000) The effect of particle size on the electric conducting percolation threshold in polymer/conducting particle composites. J Mater Sci Lett 19: 377–379.    
  • 14. Chunhui S, Mu P, Runzhang Y (2008) The effect of particle size gradation of conductive fillers on the conductivity and the flexural strength of composite bipolar plate. Int J Hydrogen Energ 33: 1035–1039.    
  • 15. Dhakate SR, Mathur RB, Kakati BK, et al. (2007) Properties of graphite composite bipolar plate prepared by compression molding technique for PEM fuel cell. Int J Hydrogen Energ 32: 4537–4543.    
  • 16. Dweiri R, Sahari J (2007) Electricalproperties of carbon-based polypropylene composites for bipolar plates in polymer electrolyte membrane fuel cell (PEMFC). J Power Sources 171: 424–432.    
  • 17. Hu N, Masuda Z, Yamamoto G, et al. (2008) Effect of fabrication process on electrical properties of polymer/multi-wall carbon nanotube nanocomposite. Compos Part A-Appl S 39: 893–903.    
  • 18. Suherman H, Sulong AB, Sahari J (2010) Effect of filler loading concentration, curing temperature and molding pressure on the electrical conductivity of CNTs/graphite/epoxy nanocomposites at high loading of conductive fillers. IJMME 5: 74–79.
  • 19. Suherman H, Sahari J, Sulong AB (2013) Electrical conductivity and hardness property of CNTs/epoxy nanocomposites. Adv Mater Res 701: 197–201.    
  • 20. Du L, Jana SC (2007) Highly conductive epoxy/graphite composites for bipolar plates in proton exchange membrane fuel cells. J Power Sources 172: 734–741.    
  • 21. Suherman H, Sahari J, Sulong AB (2014) Properties of epoxy/carbon black/graphite composites for bipolar plate in polymer electrolyte membrane fuel cell. Adv Mater Res 911: 8–12.    
  • 22. Zakaria MY, Sulong AB, Sahari J, et al. (2015) Effect of the addition of milled carbon fiber as a secondary filler on the electrical conductivity of graphite/epoxy composites for electrical conductive material. Compos Part B-Eng 83: 75–80.    


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