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Graded Composites of Polyamide/Carbon Nanotubes Prepared by Laser Sintering

  • G. V. Salmoria
  • R. A. Paggi
  • V. E. Beal
Article

Abstract

In this study, the mechanical and electrical properties of graded composition material (GM) were investigated in order to evaluate the effects of the addition of multi-walled carbon nanotubes (MWCNTs) to a polyamide 12 (PA12) matrix in different proportions. A graded component of PA12/MWCNTs was designed and manufactured by selective laser sintering (SLS) and variations in the morphology as well as in the mechanical and electrical properties were observed. The effect of different proportions of MWCNTs in the PA12 was investigated by microscopy, flexural test and resistivity measurements. The addition of 0.5 and 1.0 wt% of MWCNTs promoted an increase in the composite strength and flexural modulus. A significant reduction in the resistivity was verified with the addition of 3.0% of MWCNTs in the polyamide matrix. The mechanical and electrical behavior presented by the PA12/MWCNT composites suggests that the percolation concentration is around 3 wt%, when an effective inter-nanotube contact seems to be reached, improving the electrical conductivity but reducing the mechanical strength. A GM component with an MWCNT concentration gradient along the vertical axis was designed and manufactured by SLS. A gradual controlled variation in the composition of GM component leads to variations in the microstructure as well as in the mechanical and electrical properties.

Keywords

Graded Composites Polyamide/carbon nanotubes Laser sintering 

Notes

Acknowledgements

The authors would like to thank AEB (Agência Espacial Brasileira), CNPq and FAPESC, for financial support through the PRONEX program.

References

  1. 1.
    Potschke, P., Goad, M.A., Alig, I., Dudkin, S., Lellinger, D.: Rheological and dielectrical characterization of melt mixed polycarbonate-multiwalled carbon nanotube composites. Polymer 45, 8863–8870 (2004)CrossRefGoogle Scholar
  2. 2.
    Yu, A., Hu, H., Bekyarova, E., Itkis, M., Gao, J., Zhao, B., Haddon, C.: Incorporation of highly dispersed single-walled carbon nanotubes in a polyimide matrix. Compos. Sci. Technol. 66, 1190–1197 (2006)CrossRefGoogle Scholar
  3. 3.
    Haggenmueller, R., Du, F., Fischer, J.E., Winey, K.I.: Interfacial in situ polymerization of single wall carbon nanotube/nylon 6,6 nanocomposites. Polymer 47, 2381 (2006)CrossRefGoogle Scholar
  4. 4.
    Kim, H.S., Park, H., Yoon, J.S., Jin, H.J.: Nylon 610/functionalized multiwalled carbon nanotubes composites by in situ interfacial polymerization. Mater. Lett. 61, 2251–2254 (2007)CrossRefGoogle Scholar
  5. 5.
    Zeng, H., Gao, C., Wang, Y., Watts, P.C.P., Kong, H., Cui, X., Yan, D.: In situ polymerization approach to multiwalled carbon nanotubes-reinforced nylon 1010 composites: mechanical properties and crystallization behavior. Polymer 47, 113–122 (2006)CrossRefGoogle Scholar
  6. 6.
    Kang, M., Myung, S.J., Jin, H.J.: Nylon 610 and carbon nanotube composite by in situ interfacial polymerization. Polymer 47, 3961–3966 (2006)CrossRefGoogle Scholar
  7. 7.
    Chen, C.M., Peng, Y.W., Yu, H.W., Chen, C.F.: Thin Solid Films 498, 202–205 (2006)CrossRefGoogle Scholar
  8. 8.
    Shishkovsky, I.: Synthesis of functional gradient parts via RP methods. Rapid Prototyp J 7(n0), 4 (2001)Google Scholar
  9. 9.
    Salmoria, G.V., Leite, J.L., Paggi, R.A.: The microstructural characterization of PA6/PA12 blend specimens fabricated by selective laser sintering. Polym. Test. 28(7), 746–751 (2009)CrossRefGoogle Scholar
  10. 10.
    Salmoria, G.V., Leite, J.L., Vieira, L.F., Roesler, C.R.M.: Mechanical properties of PA6/PA12 blend specimens prepared by selective laser sintering. Polym. Test. 31(3), 411–416 (2012)CrossRefGoogle Scholar
  11. 11.
    Salmoria, G.V., Fancello, E.A., Roesler, C.R.M., Dabbas, F.: Functional graded scaffold of HDPE/HA prepared by selective laser sintering: microstructure and mechanical properties. Int. J. Adv. Manuf. Technol. 65, 1529–1534 (2013)CrossRefGoogle Scholar
  12. 12.
    Salmoria, G.V., Ahrens, C.H., Klauss, P., Paggi, R.A., Lago, A.: Rapid manufacturing of polyethylene parts with controlled pore size gradients using selective laser sintering. Mater. Res. 10(2), 211–214 (2007)CrossRefGoogle Scholar
  13. 13.
    Leite, J.L., Salmoria, G.V., Paggi, R.A., Ahrens, C.H., Pouzada, A.S.: A study on morphological properties of laser sintered functionally graded blends of amorphous thermoplastics. Int. J. Mater. Prod. Technol. 39, 205–221 (2010)CrossRefGoogle Scholar
  14. 14.
    Leite, J.L., Salmoria, G.V., Paggi, R.A., Ahrens, C.H., Pouzada, A.S.: Morphology and mechanical properties of functionally graded PA12/HDPE parts by selective laser sintering. Int. J. Adv. Manuf. Tech. 59, 583–591 (2012)CrossRefGoogle Scholar
  15. 15.
    Bai, J., Goodridge, R.D., Hague, R.J.M., Song, M.: Improving the mechanical properties of laser-sintered polyamide 12 through incorporation of carbon nanotubes. Polym. Eng. Sci. 53, 1937–1946 (2013)CrossRefGoogle Scholar
  16. 16.
    Bai, J., Goodridge, R.D., Hague, R.J.M., Song, M., Okamoto, M.: Influence of carbon nanotubes on the rheology and dynamic mechanical properties of polyamide-12 for laser sintering. Polym. Test. 36, 95–100 (2014)CrossRefGoogle Scholar
  17. 17.
    Bai, J., Goodridge, R.D., Hague, R.J.M., Song, M., Murakami, H.: Nanostructural characterization of carbon nanotubes in laser-sintered polyamide 12 by 3D-TEM. J. Mater. Res. 29(17), 1817–1823 (2014)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.CIMJECT, Dep. Engenharia Mecânica; Universidade Federal de Santa CatarinaFlorianópolisBrazil
  2. 2.FIEB-CIMATECSalvadorBrazil

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