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Self-Healing Silicones for Outdoor High Voltage Insulation: Mechanism, Applications and Measurements

Author

Listed:
  • Fadi Z. Kamand

    (Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar)

  • Basharat Mehmood

    (Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada)

  • Refat Ghunem

    (NRC Metrology Research Center, National Research Council Canada, Ottawa, ON K1A 0R6, Canada)

  • Mohammad K. Hassan

    (Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar)

  • Ayman El-Hag

    (Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada)

  • Leena Al-Sulaiti

    (Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar)

  • Ahmed Abdala

    (Chemical Engineering Program, Texas A&M University at Qatar, Doha P.O. Box 23874, Qatar)

Abstract

This paper discusses the state of the art in the application of self-healing silicone-based materials for outdoor high-voltage insulation. Both the dynamic behavior of the dimethyl side groups of silicone rubber and the diffusion of a bulk siloxane to maintain low surface energy are respectively reported as intrinsic mechanisms responsible for the self-healing of silicone rubber. Localization, temporality, mobility, and the type of synthesis are the aspects defining the efficiency of the self-healing ability of silicone rubber. In addition, the deterioration of the self-healing ability with filler loaded into silicone rubber insulation housing composites is discussed. Taking the self-healing property into consideration among the other properties of silicone rubber insulators, such as tracking and erosion resistance, can be a useful design practice at the material development stage. Hydrophobicity retention, recovery, and transfer measurements are discussed as useful indicators of the self-healing ability of silicone rubber. Nevertheless, there remains a need to standardize them as design tests at the material development stage. The paper is intended to shed the light on the hydrophobicity recovery, a key material design parameter in the development of silicone rubber outdoor insulating composites, similar to the tracking and erosion resistance.

Suggested Citation

  • Fadi Z. Kamand & Basharat Mehmood & Refat Ghunem & Mohammad K. Hassan & Ayman El-Hag & Leena Al-Sulaiti & Ahmed Abdala, 2022. "Self-Healing Silicones for Outdoor High Voltage Insulation: Mechanism, Applications and Measurements," Energies, MDPI, vol. 15(5), pages 1-17, February.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1677-:d:757186
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