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Fabrication Process of Silicone-based Dielectric Elastomer Actuators
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Surface Structural Changes in Silicone Rubber Due to Electrical Tracking.

Harpreet Kaur1, Kavin Bhuvan1,2, Rajkumar Padmawar2

  • 1Department of Chemistry, University of Victoria, Victoria, British Columbia, Canada.

Applied Spectroscopy
|March 19, 2024
PubMed
Summary
This summary is machine-generated.

Degradation of silicone composite insulators under electrical stress was studied. Spectroscopic analysis revealed changes in functional groups and surface properties, offering insights into material failure mechanisms for power grids.

Keywords:
2D-COSATR FT-IRSilicone rubberattenuated total reflection Fourier transform infrared spectroscopyelectrical insulatorstrackingtwo-dimensional correlation spectroscopy

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Polymer Chemistry

Background:

  • Silicone composite insulators are vital for power transmission and distribution.
  • These insulators degrade under operational electrical and environmental stresses.
  • Understanding degradation mechanisms is key to preventing electrical grid failures.

Purpose of the Study:

  • To investigate the degradation mechanism of silicone rubber in composite insulators.
  • To correlate material structural changes with electrical tracking.
  • To provide insights into potential failures in electrical power systems.

Main Methods:

  • Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) was employed.
  • Two-dimensional correlation spectroscopy (2D-COS) analyzed spectral changes.
  • Contact angle measurements assessed surface properties.

Main Results:

  • ATR-FTIR showed decreased absorbance in Si-O-Si, methyl, Al-O, and hydroxyl groups with tracking cycles.
  • 2D-COS identified the degradation sequence: Al-O/OH, then Si-O-Si backbone, followed by methyl side chains.
  • Contact angle increased with tracking cycles, indicating increased surface roughness.

Conclusions:

  • Electrical tracking alters the chemical structure of silicone composite insulators.
  • The degradation process affects both inorganic fillers and organic polymer components.
  • Surface changes, including roughness, are linked to electrical tracking and material degradation.