Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes

Jing Li; Peng Cheng Ma; Wing Sze Chow; Chi Kai To; Ben Zhong Tang; Jang Kyo Kim

doi:10.1002/adfm.200700065

Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes

Jing Li
, Peng Cheng Ma
, Wing Sze Chow
, Chi Kai To
, Ben Zhong Tang
, Jang Kyo Kim

Mechanical & Nuclear Engineering

The Hong Kong University of Science and Technology

Research output: Contribution to journal › Article › peer-review

1091 Scopus citations

Abstract

Critical factors that determine the percolation threshold of carbon nanotube (CNT)-reinforced polymer nanocomposites are studied. An improved analytical model is developed based on an interparticle distance concept. Two dispersion parameters are introduced in the model to correctly reflect the different dispersion states of CNTs in the matrix-entangled bundles and well-dispersed individual CNTs. CNT-epoxy nanocomposites with different dispersion states are fabricated from the same constituent materials by employing different processing conditions. The corresponding percolation thresholds of the nanocomposites vary over a wide range, from 0.1 to greater than 1.0 wt %, and these variations are explained in terms of dispersion parameters and aspect ratios of CNTs. Important factors that control the percolation threshold of nanocomposites are identified based on the comparison between modeling data and experimental results.

Original language	British English
Pages (from-to)	3207-3215
Number of pages	9
Journal	Advanced Functional Materials
Volume	17
Issue number	16
DOIs	https://doi.org/10.1002/adfm.200700065
State	Published - 5 Nov 2007

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title = "Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes",

abstract = "Critical factors that determine the percolation threshold of carbon nanotube (CNT)-reinforced polymer nanocomposites are studied. An improved analytical model is developed based on an interparticle distance concept. Two dispersion parameters are introduced in the model to correctly reflect the different dispersion states of CNTs in the matrix-entangled bundles and well-dispersed individual CNTs. CNT-epoxy nanocomposites with different dispersion states are fabricated from the same constituent materials by employing different processing conditions. The corresponding percolation thresholds of the nanocomposites vary over a wide range, from 0.1 to greater than 1.0 wt \%, and these variations are explained in terms of dispersion parameters and aspect ratios of CNTs. Important factors that control the percolation threshold of nanocomposites are identified based on the comparison between modeling data and experimental results.",

author = "Jing Li and Ma, \{Peng Cheng\} and Chow, \{Wing Sze\} and To, \{Chi Kai\} and Tang, \{Ben Zhong\} and Kim, \{Jang Kyo\}",

note = "Funding Information: Acknowledgements. This work has been developed with the support of the Spanish Government under the projects SESAMO TIN2007-62894 and HI2008-0190 and the program FPU AP2006-02324, partially funded by the EU Commission through the projects COMPAS, NESSOS and ANIKETOS, and co-financed by FEDER. The authors would also like to thank all the people that participated in COMPRO application, and Amit K. Chopra and Richard Bertnsson Svensson for their useful comments on the paper. Funding Information: This work has been developed with the support of the Spanish Government under the projects SESAMO TIN2007-62894 and HI2008-0190 and the program FPU AP2006-02324, partially funded by the EU Commission through the projects COMPAS, NESSOS and ANIKETOS, and co-financed by FEDER. The authors would also like to thank all the people that participated in COMPRO application, and Amit K. Chopra and Richard Bertnsson Svensson for their useful comments on the paper.",

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N2 - Critical factors that determine the percolation threshold of carbon nanotube (CNT)-reinforced polymer nanocomposites are studied. An improved analytical model is developed based on an interparticle distance concept. Two dispersion parameters are introduced in the model to correctly reflect the different dispersion states of CNTs in the matrix-entangled bundles and well-dispersed individual CNTs. CNT-epoxy nanocomposites with different dispersion states are fabricated from the same constituent materials by employing different processing conditions. The corresponding percolation thresholds of the nanocomposites vary over a wide range, from 0.1 to greater than 1.0 wt %, and these variations are explained in terms of dispersion parameters and aspect ratios of CNTs. Important factors that control the percolation threshold of nanocomposites are identified based on the comparison between modeling data and experimental results.

AB - Critical factors that determine the percolation threshold of carbon nanotube (CNT)-reinforced polymer nanocomposites are studied. An improved analytical model is developed based on an interparticle distance concept. Two dispersion parameters are introduced in the model to correctly reflect the different dispersion states of CNTs in the matrix-entangled bundles and well-dispersed individual CNTs. CNT-epoxy nanocomposites with different dispersion states are fabricated from the same constituent materials by employing different processing conditions. The corresponding percolation thresholds of the nanocomposites vary over a wide range, from 0.1 to greater than 1.0 wt %, and these variations are explained in terms of dispersion parameters and aspect ratios of CNTs. Important factors that control the percolation threshold of nanocomposites are identified based on the comparison between modeling data and experimental results.

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Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes

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