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 journalArticlepeer-review

    6 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

    Bibliographical note

    Funding Information:
    This research was partly supported by a grant (code BB3-101 ) from Carbon Dioxide Reduction & Sequestration Research Center, one of the 21st Century Frontier Programs funded by the Ministry of Education, Science and Technology of Korean government . This work was partly supported by the grant from the Industrial technology development program of the Ministry of Knowledge Economy (MKE) of Korea . The author (M.S. Han) was supported by the Korea University Grant .

    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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