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Highly electrically conductive polymer composite with a novel fiber-based segregated structure

  • Polymers & biopolymers
  • Published:
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Abstract

Electrically conductive polymer composites (CPCs) have been applied extensively in many fields such as electronics, wearable sensors and antistatic agent. It is still challenging to develop CPCs with a low percolation threshold and high electrical conductivity. Here, highly electrically conductive polystyrene (PS) composite with a fiber-based segregated structure is prepared by carbon nanotubes (CNTs) decoration onto the electrospun PS fibers, followed by hot press at a proper temperature. In the electrically conductive PS composite, the CNTs are segregated at the interface among the fiber-shaped matrix, and the one-dimensional fiber possessing the merit of a large aspect ratio, which facilitates the formation of conductive network. The percolation threshold is calculated to be 0.084 vol%, and the electrical conductivity of the CPC reaches 83.3 S/m when the concentration of the CNTs is 1.5 vol%. If the hot press temperature is much higher than the glass transition temperature of PS, the fiber-based segregated structure would be destroyed, increasing the percolation threshold while decreasing the conductivity of the composite. The fiber-based segregated structure provides a new and versatile route for the rational design and preparation of CPCs with a low percolation threshold and high conductivity.

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Acknowledgements

This work was financially supported by Natural Science Foundation of China (Nos. 51873178, 51503179), the Jiangsu Province Postdoctoral Science Foundation (No. 1601024A), the Priority Academic Program Development of Jiangsu Higher Education Institutions, and Innovation Program for Graduate Students in Universities of Jiangsu Province (No. KYCX18_2364).

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Correspondence to Jiefeng Gao.

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Wang, L., Wang, H., Li, B. et al. Highly electrically conductive polymer composite with a novel fiber-based segregated structure. J Mater Sci 55, 11727–11738 (2020). https://doi.org/10.1007/s10853-020-04797-y

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