Processing and properties of electrically conductive nanocomposites based on polyamide-12 filled with exfoliated graphite nanoplatelets prepared by selective laser sintering

  • Shaun Eshraghi
  • Mehdi Karevan
  • Kyriaki Kalaitzidou
  • Suman Das
Article

Abstract

Electrically conductive polymer nanocomposites were prepared through selective laser sintering (SLS) of polyamide-12 (PA) powder coated with graphite nanoplatelets (GNP) using sonication. The SLS process parameters were optimized in order to maximize the tensile modulus at 3 and 5 wt% GNP. The highest tensile modulus (2.1 GPa) was achieved at 3 wt%. A slight decrease in flexural modulus and strength was observed at 3 and 5 wt% GNP compared with the neat polymer. Morphological observation of the graphitecoated PA powder showed fairly homogeneous dispersion. The SLS processed parts were nearly fully dense and the highest density (99.5%) was found at 3 wt% GNP. The bulk electrical conductivity of the SLS-processed nanocomposites was found to be 3.8×10−11 and 6.4×10−8 S/cm for 3 and 5 wt% GNP respectively.

Keywords

Selective laser sintering Nanocomposite Exfoliated graphite Polyamide-12 Nylon-12 Electrical conductivity 

Nomenclature

GNP

Graphite Nanoplatelets

PA

Polyamide

PNC

Polymer Nanocomposite

SLS

Selective Laser Sintering

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References

  1. 1.
    Bhattacharya, S. N., Kamal, M. R., and Gupta, R. K., “Polymeric nanocomposites: Theory and practice,” Hanser Verlag, 2008.Google Scholar
  2. 2.
    Kawasumi, M., Hasegawa, N., Kato, M., Usuki, A., and Okada, A., “Preparation and mechanical properties of polypropylene-clay hybrids,” Macromolecules, Vol. 30, No. 20, pp. 6333–6338, 1997.CrossRefGoogle Scholar
  3. 3.
    Kato, M., Usuki, A., and Okada, A., “Synthesis of polypropylene oligomer-clay intercalation compounds,” Journal of Applied Polymer Science, Vol. 66, No. 9, pp. 1781–1785, 1997.CrossRefGoogle Scholar
  4. 4.
    Yasmin, A., Abot, J. L., and Daniel, I. M., “Processing of clay/epoxy nanocomposites by shear mixing,” Scripta Materialia, Vol. 49, No. 1, pp. 81–86, 2003.CrossRefGoogle Scholar
  5. 5.
    Vaia, R. A., Jandt, K. D., Kramer, E. J., and Giannelis, E. P., “Microstructural evolution of melt intercalated polymer-organically modified layered silicates nanocomposites,” Chemistry of Materials, Vol. 8, No. 11, pp. 2628–2635, 1996.CrossRefGoogle Scholar
  6. 6.
    Deshmane, C., Yuan, Q., and Misra, R., “On the fracture characteristics of impact tested high density polyethylene-calcium carbonate nanocomposites,” Materials Science and Engineering: A, Vol. 452, pp. 592–601, 2007.CrossRefGoogle Scholar
  7. 7.
    Kalaitzidou, K., Fukushima, H., and Drzal, L. T., “Mechanical properties and morphological characterization of exfoliated graphitepolypropylene nanocomposites,” Composites Part A: Applied Science and Manufacturing, Vol. 38, No. 7, pp. 1675–1682, 2007.CrossRefGoogle Scholar
  8. 8.
    Cembrola, R. J., “The relationship of carbon-black dispersion to electrical-resistivity and vulcanizate physical-properties,” Polymer Engineering & Science, Vol. 22, No. 10, pp. 601–609, 1982.CrossRefGoogle Scholar
  9. 9.
    Agari, Y., Ueda, A., and Nagai, S., “Thermal-conductivities of composites in several types of dispersion-systems,” Journal of Applied Polymer Science, Vol. 42, No. 6, pp. 1665–1669, 1991.CrossRefGoogle Scholar
  10. 10.
    Deckard, C. R., “Selective laser sintering,” Ph.D. Thesis, Austin, University of Texas at Austin, 1988.Google Scholar
  11. 11.
    Liu, F. H., Shen, Y. K., and Lee, J. L., “Selective laser sintering of a hydroxyapatite-silica scaffold on cultured MG63 osteoblasts in vitro,” Int. J. Precis. Eng. Manuf., Vol. 13, No. 3, pp. 439–444, 2012.CrossRefGoogle Scholar
  12. 12.
    Lee, P. H., Chang, E., Yu, S., Lee, S. W., Kim, I. W., Park, S., and Chung, H., “Modification and characteristics of biodegradable polymer suitable for selective laser sintering,” Int. J. Precis. Eng. Manuf., Vol. 14, No. 6, pp. 1079–1086, 2013.CrossRefGoogle Scholar
  13. 13.
    Athreya, S. R., Kalaitzidou, K., and Das, S., “Processing and characterization of a carbon black-filled electrically conductive nylon-12 nanocomposite produced by selective laser sintering,” Materials Science and Engineering: A, Vol. 527, No. 10–11, pp. 2637–2642, 2010.CrossRefGoogle Scholar
  14. 14.
    Athreya, S. R., Kalaitzidou, K., and Das, S., “Mechanical and microstructural properties of nylon-12/carbon black composites: Selective laser sintering versus melt compounding and injection molding,” Composites Science and Technology, Vol. 71, No. 4, pp. 506–510, 2011.CrossRefGoogle Scholar
  15. 15.
    Jiang, X. and Drzal, L. T., “Multifunctional high density polyethylene nanocomposites produced by incorporation of exfoliated graphite nanoplatelets 1: Morphology and mechanical properties,” Polymer Composites, Vol. 31, No. 6, pp. 1091–1098, 2010.Google Scholar
  16. 16.
    Drzal, L., Fukushima, H., and Do, I., “Exfoliated graphite nanoplatelets (xGnP) a carbon nanotube alternative for modifying the properties of polymers and composites,” XG Sciences, 2006.Google Scholar
  17. 17.
    Kalaitzidou, K., Fukushima, H., and Drzal, L. T., “Mechanical properties and morphological characterization of exfoliated graphitepolypropylene nanocomposites,” Composites Part A: Applied Science and Manufacturing, Vol. 38, No. 7, pp. 1675–1682, 2007.CrossRefGoogle Scholar
  18. 18.
    Athreya, S. R., Kalaitzidou, K., and Das, S., “Microstructure, thermomechanical properties, and electrical conductivity of carbon black — filled nylon — 12 nanocomposite prepared by selective laser sintering,” Polymer Engineering & Science, Vol. 52, No. 1, pp. 12–20, 2012.CrossRefGoogle Scholar
  19. 19.
    Chung, H. and Das, S., “Functionally graded nylon-11/silica nanocomposites produced by selective laser sintering,” Materials Science and Engineering: A, Vol. 487, No. 1, pp. 251–257, 2008.CrossRefGoogle Scholar
  20. 20.
    Chung, H. and Das, S., “Processing and properties of glass bead particulate-filled functionally graded nylon-11 composites produced by selective laser sintering,” Materials Science and Engineering: A, Vol. 437, No. 2, pp. 226–234, 2006.CrossRefGoogle Scholar
  21. 21.
    Kim, J. and Creasy, T., “Selective laser sintering characteristics of nylon 6/clay-reinforced nanocomposite,” Polymer Testing, Vol. 23, No. 6, pp. 629–636, 2004.CrossRefGoogle Scholar

Copyright information

© Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Shaun Eshraghi
    • 1
  • Mehdi Karevan
    • 1
  • Kyriaki Kalaitzidou
    • 1
    • 2
  • Suman Das
    • 1
    • 2
  1. 1.George W. Woodruff School of Mechanical EngineeringGeorgia Institute of TechnologyAtlantaUSA
  2. 2.School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaUSA

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