Bent-shape effects of multi-walled carbon nanotube on the electrical conductivity and rheological properties of polycarbonate/multi-walled carbon nanotube nanocomposites

Mi Sun Han, Yun Kyun Lee, Chang Hun Yun, Heon Sang Lee, Cheol Jin Lee, Woo Nyon Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this study, polycarbonate (PC)/multi-walled carbon nanotube (MWCNT) nancomposites have been prepared by pretreating MWCNT solutions with ultrasonication. We demonstrate that the electrical conductivity and rheological properties of PC/MWCNT nanocomposites strongly depend on the mesoscopic shape factor (lsp/d), which is represented by the ratio between the static bending persistence length (lsp) and outer diameter (d) of the MWCNT. The electrical conductivity of PC/MWCNT nanocomposites increases linearly with increasing (lsp/d)2 and the percolation threshold of PC/MWCNT nanocomposites decreases linearly with increasing (l sp/d)2 of MWCNTs. The storage modulus of PC/MWCNT nanocomposites increases linearly with increasing (lsp/d)2 of MWCNTs at all frequency ranges.

Original languageEnglish
Pages (from-to)1629-1634
Number of pages6
JournalSynthetic Metals
Volume161
Issue number15-16
DOIs
Publication statusPublished - 2011 Aug

Keywords

  • Carbon nanotubes
  • Electrical conductivity
  • Percolation threshold
  • Polymer composites
  • Rheology

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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