2010
DOI: 10.1063/1.3309590
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Monte Carlo modeling of the fiber curliness effect on percolation of conductive composites

Abstract: A three-dimensional (3D) Monte Carlo model is developed to study the fiber curliness effect on the percolation threshold of a composite filled with electrically conductive curved fibers. These fibers are simulated as zigzag-shaped fibers that are randomly positioned in the composite, forming a 3D random network. The simulation results show that the fiber curliness can significantly affect the percolation threshold: the more curved the fibers, the higher the threshold. The results also reveal an exponential rel… Show more

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Cited by 30 publications
(16 citation statements)
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“…36,37 The effective aspect ratio of ller gradually increases with its stiffness, which reduces the percolation threshold of PNCs. 13,27,[38][39][40]44 Under the shear eld, it induces the destruction and build-up of the conductive network. CNTs in a shear gradient can pick up other CNTs and stick to each other, which is called the 'picking-up' mechanism.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…36,37 The effective aspect ratio of ller gradually increases with its stiffness, which reduces the percolation threshold of PNCs. 13,27,[38][39][40]44 Under the shear eld, it induces the destruction and build-up of the conductive network. CNTs in a shear gradient can pick up other CNTs and stick to each other, which is called the 'picking-up' mechanism.…”
Section: Discussionmentioning
confidence: 99%
“…25 The contribution of longer CNTs to the formation of conductive network is through linking the shorter CNTs. 26,27 By employing molecular dynamics simulation, nanorods are more effective in forming a percolating network at a lower volume fraction than nanoplates and nanospheres. 28 The anisotropy of the electrical property of aligned CNT/polymer composites is mainly affected by the average conductive pathway density of CNTs.…”
Section: Introductionmentioning
confidence: 99%
“…Fillers with high aspect ratios normally involve waviness [10][11][12][13]. For such cases, the results obtained based on ellipsoids should be modified to account for the waviness.…”
Section: Waviness Of Fillers With High Aspect Ratiosmentioning
confidence: 99%
“…[12][13][14][15][16][17][18][19][20][21][22][23][24] Due to their small cross section compared to their total length, CNT may curve to various degrees and affect the CNT connectivity within the network. 15 Waviness remains a difficult parameter to study experimentally because the presence of curved CNT drastically depends on the experimental conditions used for the CNT growth. 25 In contrast, the wavy nature of CNT has been computationally investigated at different occasions but rarely with an atomistic precision.…”
Section: Introductionmentioning
confidence: 99%
“…25 In contrast, the wavy nature of CNT has been computationally investigated at different occasions but rarely with an atomistic precision. [12][13][14][15][16][17][18] The more usual method to model waviness is by connecting a series of straight segments that form an object and by defining a wave angle between segments. Previous works have modelled flexible CNT made of up to 20 segments, but it appears that 10 segments would be enough to give an appropriate description of waviness.…”
Section: Introductionmentioning
confidence: 99%