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Carbon Letters

, Volume 29, Issue 1, pp 57–63 | Cite as

Effects of multi-walled carbon nanotube and flow types on the electrical conductivity of polycarbonate/carbon nanotube nanocomposites

  • Kwan Han Yoon
  • Young Sil LeeEmail author
Original Article
  • 2 Downloads

Abstract

Effects of multi-walled carbon nanotube (MWCNT) type and flow type (shear and elongational flow) on the electrical conductivity of polycarbonate (PC)/MWCNT nanocomposites were investigated. Two different MWCNTs produced a huge difference in electrical conductivity in an injection molded PC/MWCNT nanocomposite. It was observed that MWCNTs having a higher aspect ratio provide much lower electrical conductivity in injection molded PC/MWCNT nanocomposites while the conductivities of compression molded samples from two different MWCNTs were the same. We found that this is due to a difference in the deformability of the two MWCNTs. Nanocomposite samples prepared at a higher extensional rate and shear rate showed lower electrical conductivity. This is attributed to flow induced orientation of the MWCNTs. The experimental results were discussed in relation to variation in the tube–tube contact due to the change of the MWCNT orientation.

Keywords

Multi-walled carbon nanotube Shear flow Elongational flow Electrical conductivity Polycarbonate Nanocomposite Percolation 

Notes

Acknowledgements

This paper was supported by Kumoh National Institute of Technology.

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Copyright information

© Korean Carbon Society 2019

Authors and Affiliations

  1. 1.Department of Chemical EngineeringKumoh National Institute of TechnologyGumiRepublic of Korea
  2. 2.Industry-Academic Cooperation FoundationKumoh National Institute of TechnologyGumiRepublic of Korea

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