Carbon nanotube agglomeration effect on piezoresistivity of polymer nanocomposites

被引：123

作者：

Gong, S. ^{[1
]}

Zhu, Z. H. ^{[1
]}

Meguid, S. A. ^{[2
]}

机构：

[1] York Univ, Dept Earth & Space Sci & Engn, Toronto, ON M3J 1P3, Canada

[2] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

来源：

POLYMER | 2014年 / 55卷 / 21期

关键词：

Carbon nanotube agglomeration; Piezoresistivity; Polymer-matrix composites; FIBER COMPOSITES; STRAIN; MATRIX; EPOXY; DISPERSIONS; PERCOLATION; SENSORS; MODEL;

D O I：

10.1016/j.polymer.2014.08.054

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Carbon nanotube (CNT) agglomeration exists inevitably in all CNT-polymer composites. This paper quantified the effect of CNT agglomeration on the piezoresistivity of CNT-polymer composites. A new multiscale model of 3-dimensional deformable CNT percolating networks has been developed, where the CNT agglomerates were modeled as second phases embedded randomly in the polymer matrix. The newly developed model agrees quantitatively with experimental data. The study found that the CNT agglomeration is responsible for the reduced electrical conductivity and nonlinearity of piezoresistivity with respect to the zero strain. Its effect can be quantified by the newly developed model. Parametric analyses were conducted to show the effects of morphology and electrical properties of CNTs, the Poisson's ratio of CNT-polymer composites and the extent, internal density and size of CNT agglomeration on the electrical conductivity and piezoresistivity. The current work provides a useful analysis tool for designing smart sensing and multifunctional polymer composites. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：5488 / 5499

页数：12

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