Effect of nanotube waviness on the electrical conductivity of carbon nanotube-based composites

被引：169

作者：

Li, Chunyu ^{[1
]}

Thostenson, Erik T. ^{[1
]}

Chou, Tsu-Wei ^{[1
]}

机构：

[1] Univ Delaware, Dept Mech Engn, Ctr Composite Mat, Newark, DE 19716 USA

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2008年 / 68卷 / 06期

关键词：

carbon nanotubes; nanocomposites; electrical property; probabilistic method; modelling;

D O I：

10.1016/j.compscitech.2007.10.056

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

This paper reports the effect of nanotube waviness on the electrical conductivity of carbon nanotube-based composites using a percolation model. Wavy nanotubes are approximated by elongated polygons, and the current-carrying backbones of percolation clusters in the composite are identified by the direct electrifying algorithm. The tunneling resistance due to an insulating film of matrix material between crossing nanotubes is considered. Results of Monte Carlo simulations indicate that the electrical conductivity of composites with wavy nanotubes are lower than that of composites with straight nanotubes. The critical exponent of the power-law dependence of electrical conductivity on nanotube concentration decreases with increasing nanotube curl ratio. The conductivity exhibits an inverse power-law dependence on the curl ratio with a critical exponent in the range of 2.2-2.6. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1445 / 1452

页数：8

共 57 条

[1] Electrical conductivity and dielectric properties of multiwalled carbon nanotube and alumina composites [J].

Ahmad, Kaleem ;

Pan, Wei ;

Shi, Sui-Lin .

APPLIED PHYSICS LETTERS, 2006, 89 (13)

[2] Percolation and tunneling in composite materials [J].

Balberg, I ;

Azulay, D ;

Toker, D ;

Millo, O .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2004, 18 (15) :2091-2121

[3] Computational study of geometry-dependent resistivity scaling in single-walled carbon nanotube films [J].

Behnam, Ashkan ;

Ural, Ant .

PHYSICAL REVIEW B, 2007, 75 (12)

[4] Unusually high thermal conductivity of carbon nanotubes [J].

Berber, S ;

Kwon, YK ;

Tománek, D .

PHYSICAL REVIEW LETTERS, 2000, 84 (20) :4613-4616

[5] Modeling percolation in high-aspect-ratio fiber systems. II. The effect of waviness on the percolation onset [J].

Berhan, L. ;

Sastry, A. M. .

PHYSICAL REVIEW E, 2007, 75 (04)

[6] PLASTIC COMPOSITES FOR ELECTROMAGNETIC-INTERFERENCE SHIELDING APPLICATIONS [J].

BIGG, DM ;

STUTZ, DE .

POLYMER COMPOSITES, 1983, 4 (01) :40-46

[7] Very low conductivity threshold in bulk isotropic single-walled carbon nanotube-epoxy composites [J].

Bryning, MB ;

Islam, MF ;

Kikkawa, JM ;

Yodh, AG .

ADVANCED MATERIALS, 2005, 17 (09) :1186-+

[8] Contact resistance between carbon nanotubes [J].

Buldum, A ;

Lu, JP .

PHYSICAL REVIEW B, 2001, 63 (16)

[9] Percolation-dominated conductivity in a conjugated-polymer-carbon-nanotube composite [J].

Coleman, JN ;

Curran, S ;

Dalton, AB ;

Davey, AP ;

McCarthy, B ;

Blau, W ;

Barklie, RC .

PHYSICAL REVIEW B, 1998, 58 (12) :R7492-R7495

[10] Carbon nanotube-filled polymer of electrical conductivity in composites.: Numerical simulation three-dimensional entangled fibrous networks [J].

Dalmas, Florent ;

Dendievel, Rémy ;

Chazeau, Laurent ;

Cavaillé, Jean-Yves ;

Gauthier, Catherine .

ACTA MATERIALIA, 2006, 54 (11) :2923-2931

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