Aging evaluation of silicone rubber nanocomposites

Discussed in the paper is the aging evaluation of silicone rubber nanocomposites for overhead insulation applications. In the work, various micro-nano composites are prepared for study with microflller, nanoflller, and the combination of microflller and nanoflller with a commercial surfactant to improve the dispersion of the nanoflller. The effect of the surfactant in the composites on the surface hydrophobicity is analyzed by contact angle measurements. Salt-fog chamber, inclined plane, and infrared laser ablation tests are conducted to evaluate the erosion resistance of the filled composites. The results in all three tests show that the combination of microflller and nanoflller with surfactant results in composites with improved erosion resistance to dry band arcing. In addition, a good correlation between the three tests is shown.

[1]  L. T. Zhuravlev.  The surface chemistry of amorphous silica. Zhuravlev model , 2000 .

[2]  M.J. Thomas,et al.  Polymer composite/nanocomposite processing and its effect on the electrical properties , 2006, 2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.

[3]  C. K. Dwivedi,et al.  Liquid-Contaminant: Inclined Plane Tracking and Erosion of Insulating Materials , 2010, 2010 3rd International Conference on Emerging Trends in Engineering and Technology.

[4]  M. Gauthier,et al.  Nanofilled silicone dielectrics prepared with surfactant for outdoor insulation applications , 2008, IEEE Transactions on Dielectrics and Electrical Insulation.

[5]  J. Davenport.  Editor , 1960 .

[6]  E. Papirer.  Adsorption on Silica Surfaces , 2000 .

[7]  Luke P. Lee,et al.  Effects on wettability by surfactant accumulation/depletion in bulk polydimethylsiloxane (PDMS) , 2006 .

[8]  Y. Ohki,et al.  Improving Epoxy-based Insulating Materials with Nano-fillers toward Practical Application , 2008, Conference Record of the 2008 IEEE International Symposium on Electrical Insulation.

[9]  M. Gauthier,et al.  Erosion resistance and mechanical properties of silicone nanocomposite insulation , 2009, IEEE Transactions on Dielectrics and Electrical Insulation.