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

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    energies-15-01677.pdf (4.412Mb)
    Date
    2022
    Author
    Kamand, Fadi Z.
    Mehmood, Basharat
    Ghunem, Refat
    Hassan, Mohammad K.
    El-Hag, Ayman
    Al-Sulaiti, Leena
    Abdala, Ahmed
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    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.
    DOI/handle
    http://dx.doi.org/10.3390/en15051677
    http://hdl.handle.net/10576/39402
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