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

DOI: 10.1007/s12541-013-0264-y

Cite this article as:
Eshraghi, S., Karevan, M., Kalaitzidou, K. et al. Int. J. Precis. Eng. Manuf. (2013) 14: 1947. doi:10.1007/s12541-013-0264-y

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

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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