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Effect of inhomogeneous size and shape of graphite particles on the in-plane electrical conductivity of PP/G/CB composites

  • Radwan Dweiri
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 7

Abstract

In-plane electrical conductivity higher than 100 S cm−1 for composite bipolar plates is required in fuel cells. The effect of the conductive filler size and shape, as one important factor, on the conductivity of polypropylene/graphite/carbon black (PP/G/CB) composites is investigated in this study. The “as-received” G particles were sieved to different sizes; melt compounded with PP and CB, then compression moulded to plates for conductivity measurements. G particles have different size distributions and their morphology appear with irregular shapes. The intermediate G size and relatively narrow distribution (40–150 μm) shows the highest conductivity at 80 wt.% filler loading of about 88.6 S cm−1. The presence of small G particles between larger ones and the particle's point-to-point and surface-to-surface contacts are found to be important factors in determining the conductivity values. The flexural properties are still below the target and need to be improved.

Keywords: Composites; Graphite; Particle size; Flexural strength; Electrical conductivity
* Correspondence address Dr. Radwan Dweiri Department of Materials Engineering Faculty of Engineering Al-Balqa' Applied University Al-Salt 19117 Jordan Tel.: (+962 79) 7611244 Fax: (+962 5) 3491111 E-mail:

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Received: 2011-6-17
Accepted: 2011-12-7
Published Online: 2013-06-11
Published in Print: 2012-07-01

© 2012, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110699
Keywords for this article
Composites; Graphite; Particle size; Flexural strength; Electrical conductivity

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Diffusivities and atomic mobilities in Cu-rich fcc Al–Cu–Mn alloys
  5. Phase transformations in non-isothermally annealed as-cast and cold-rolled AlMnScZr alloys
  6. High-temperature deformation behavior and thermal properties of an Ni30Co17Fe53 alloy
  7. Microstructural and mechanical properties of dual-phase steels welded using GMAW with solid and flux-cored welding wires
  8. Microstructure – wear performance relationship of hypoeutectic 15% Cr-2% Mo white iron
  9. The enhancement of wear properties of squeeze-cast A356 composites reinforced with B4C particulates
  10. Phase diagram of the Al–Dy–Zr ternary system at 773 K
  11. Calorimetric investigations of liquid gold–antimony–tin alloys
  12. Combustion synthesis and characterization of bulk nanostructured Ni50Al17Fe33 alloy
  13. Effect of sand blasting on structural, thermal, and mechanical properties of Zr58.3Cu18.8Al14.6Ni8.3 bulk metallic glass
  14. Studies of dynamic mass transfer at the slag–metal interface – Interfacial velocity measurements
  15. Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method
  16. Adsorption of bovine serum albumin onto titanium dioxide nanotube arrays
  17. CNT-based displacement sensor
  18. Non-covalent assembly of hybrid nanostructures of gold and palladium nanoparticles with carbon nanotubes
  19. Effect of solid content on performance of conductive silver paste for crystalline silicon solar cells
  20. Effect of inhomogeneous size and shape of graphite particles on the in-plane electrical conductivity of PP/G/CB composites
  21. The durability of fired brick incorporating textile factory waste ash and basaltic pumice
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  23. DGM News
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