DOI: 10.1063/1.1622772. Electrical properties of single-wall carbon nanotube and epoxy composites

Electrical properties of single-wall carbon nanotube and epoxy composites

10.1063/1.1622772

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The homogeneous composites of single-wall carbon nanotube (SWNT) and Stycast 1266 epoxy were made with the nanotube concentrations of 0.01–0.21 wt % by using a high frequency sonication method. Direct current conductivities of various mass fractions show typical percolation behavior and the percolation threshold pc is found to be 0.074 wt % and the conductivity exponent t is estimated as 1.3±0.2. The anomalously small pc is attributed to the large aspect ratio of the nanotubes. Dielectric measurement was performed at temperatures 220–300 K with the frequency range of 20 Hz–1 MHz. There appeared different dielectric aspects according to the mass fractions p≪pc, p∼pc, or p&gt;pc. The dielectric relaxation of epoxy dominates at low concentrations (p≪pc), while at high concentrations (p&gt;pc) we found a scaling property in the frequency dependence of loss tangent. The scaled loss tangent spectra show a Debye type relaxation. Near the percolation threshold (p∼pc), the composites show peaks in the frequency dependence of the imaginary part of their electric moduli. Log–log plots of ac conductivity versus frequency for the midrange (p∼pc) composites exhibit the scaling and universal behavior regardless of temperature and mass fraction of SWNT.

Bibliography

Kim, B., Lee, J., & Yu, I. (2003). Electrical properties of single-wall carbon nanotube and epoxy composites. Journal of Applied Physics, 94(10), 6724â6728.

Authors 3

Bumsuk Kim (first)
Jongjin Lee (additional)
Insuk Yu (additional)

References 20 Referenced 156

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Dates

Type	When
Created	21 years, 9 months ago (Nov. 7, 2003, 9:21 a.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 6:23 p.m.)
Indexed	5 months, 1 week ago (March 30, 2025, 3:32 a.m.)
Issued	21 years, 9 months ago (Nov. 15, 2003)
Published	21 years, 9 months ago (Nov. 15, 2003)
Published Print	21 years, 9 months ago (Nov. 15, 2003)

Funders 0

None

BibTeX

@article{Kim_2003, title={Electrical properties of single-wall carbon nanotube and epoxy composites}, volume={94}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1622772}, DOI={10.1063/1.1622772}, number={10}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Kim, Bumsuk and Lee, Jongjin and Yu, Insuk}, year={2003}, month=nov, pages={6724–6728} }

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