4.7 Article

Effect of nano-scale Cu particles on the electrical property of CNT/polymer nanocomposites

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106325

关键词

Electrical conductivity; Cu/CNT; Polymer composite; Percolation network model

资金

  1. National Natural Science Foundation of China [51701241]
  2. National Defense Pre-Research Foundation of China [61402100105]
  3. China Postdoctoral Science Foundation [2016M602423, 2018T110838]
  4. Natural Science Foundation of Hunan Province [2018JJ3647]

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The electrical conductivity of Cu/CNT/polymer composites was systematically studied through experiments and simulations, revealing that the inclusion of Cu particles on the surface of CNT significantly enhances the conductivity of the composite material. By analyzing the core mechanism, it was determined that the high conductivity and cladding rate of nano-scale Cu particles are the main factors contributing to the improved electrical properties of the composite.
The electrical conductivity of Cu/CNT/polymer composites are systematically studied by both experiments and simulation. Nano-scale Cu particles are compounded on the surface of CNT with various cladding rate. The conductivity of Cu/CNT/polymer composites are two orders of magnitude higher than that of CNT/polymer composite with the same CNT loadings. By considering Cu particles cladded on CNT surface in the developed percolation network model, Monte Carlo simulation results agree well with experiment data. On this basis, the core mechanism affecting the electrical properties of the composite is analyzed. Nano-scale Cu particles with high conductivity and cladding rate are the main reason for the high conductivity of Cu/CNT/polymer composites. In order to further improve the conductivity of CNT/polymer composites, CNT with large aspect ratio and high intrinsic conductivity can be selected and then coated with small size, high cladding rate and highly conductive metal particles. All of these experiment and simulation results benefit for the design of highly conductive CNT/polymer composite.

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