Abstract
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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