Processing and properties of electrically conductive nanocomposites based on polyamide-12 filled with exfoliated graphite nanoplatelets prepared by selective laser sintering
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.
KeywordsSelective laser sintering Nanocomposite Exfoliated graphite Polyamide-12 Nylon-12 Electrical conductivity
Selective Laser Sintering
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- 1.Bhattacharya, S. N., Kamal, M. R., and Gupta, R. K., “Polymeric nanocomposites: Theory and practice,” Hanser Verlag, 2008.Google Scholar
- 10.Deckard, C. R., “Selective laser sintering,” Ph.D. Thesis, Austin, University of Texas at Austin, 1988.Google Scholar
- 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.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