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Effect of carbon nanotube on space charge suppression in PP/EPDM/CNT nanocomposites

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Abstract

Space charge accumulation may lead to unexpected insulation breakdown. This paper reports a remarkable suppression on space charge transport in polypropylene (PP) doped with CNTs and reveals the possible mechanism of space charge suppression properties in PP/EPDM/CNT ternary nanocomposites. The space charge distribution and trap level were obtained from pulse electro-acoustic method and isothermal depolarization current waveforms respectively. Space charge injection and accumulation are suppressed to a large extent under 40 kV/mm with a very low addition of CNT (0.005 wt%), and the DC conductivity remains 10−15 S/cm as low as traditional cross-linked polyethylene (XLPE) insulation materials. The DC breakdown strength of the nanocomposites improves about 100% compared with that of traditional XLPE. By utilizing the high operating temperature of PP, mechanical flexibility of EPDM, and the space charge suppression of CNT nanoparticles, these recyclable nanocomposites are promising for replacing traditional XLPE as a new generation of insulated cable materials in the application of HVDC cables.

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Acknowledgments

This work was partially supported by National Natural Science Foundation (no. 51877142).

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Authors and Affiliations

  1. College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China

    Pei Yang & Xiancheng Ren

  2. School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Meng He

  3. School of Electrical Engineering and Information, Sichuan University, Chengdu, 610065, China

    Kai Zhou

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  1. Pei Yang
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Correspondence to Xiancheng Ren or Kai Zhou.

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Yang, P., He, M., Ren, X. et al. Effect of carbon nanotube on space charge suppression in PP/EPDM/CNT nanocomposites. J Polym Res 27, 132 (2020). https://doi.org/10.1007/s10965-020-02107-3

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