Modeling the electrical resistivity of polymer composites with segregated structures

Sung-Hoon Park (), Jinyoung Hwang, Gyeong-Su Park, Ji-Hwan Ha, Minsu Zhang, Dongearn Kim, Dong-Jin Yun, Sangeui Lee and Sang Hyun Lee ()
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Sung-Hoon Park: Soongsil University
Jinyoung Hwang: Korea Aerospace University
Gyeong-Su Park: Seoul National University
Ji-Hwan Ha: Soongsil University
Minsu Zhang: Korea University
Dongearn Kim: Korean Institute of Industrial Technology
Dong-Jin Yun: Samsung Electronics
Sangeui Lee: Inha University
Sang Hyun Lee: Korea University

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract Hybrid carbon nanotube composites with two different types of fillers have attracted considerable attention for various advantages. The incorporation of micro-scale secondary fillers creates an excluded volume that leads to the increase in the electrical conductivity. By contrast, nano-scale secondary fillers shows a conflicting behavior of the decreased electrical conductivity with micro-scale secondary fillers. Although several attempts have been made in theoretical modeling of secondary-filler composites, the knowledge about how the electrical conductivity depends on the dimension of secondary fillers was not fully understood. This work aims at comprehensive understanding of the size effect of secondary particulate fillers on the electrical conductivity, via the combination of Voronoi geometry induced from Swiss cheese models and the underlying percolation theory. This indicates a transition in the impact of the excluded volume, i.e., the adjustment of the electrical conductivity was measured in cooperation with loading of second fillers with different sizes.

Date: 2019
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DOI: 10.1038/s41467-019-10514-4

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