Behaviour of Water Droplets Under the Influence of a Uniform Electric Field in Nanocomposite Samples of Epoxy Resin/TiO2

Α. Bairaktari, M. Danikas, X. Zhao, Y. Cheng, Y. Zhang

Abstract


In this paper nanocomposite samples of epoxy resin and TiO2 nanoparticles were investigated with water droplets on their surface. A uniform electric field was applied and the behaviour of the water droplets was observed. Parameters that were studied were the water conductivity, the droplet volume, the number of droplets and the droplet positioning with respect to (w.r.t.) the electrodes. All above mentioned parameters influence the flashover voltage of the samples. It is to be noted that – at least in some cases – the water droplet positioning w.r.t. the electrodes was more important in determining the flashover voltage than the droplet volume.


Keywords


flashover voltage; surface discharges; nanocomposites; uniform electric field; water droplet; water conductivity

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References


D. Kind, H. Kaerner, “High-voltage insulation technology”, Eds. Vieweg & Sohn, Braunschweig, Germany, 1985

M. G. Danikas, A. D. Karlis, “Some observations on the dielectric breakdown and the importance of cavities in insulating materials used for cables and electrical machines”, Advances in Electrical and Computer Engineering, Vol. 11, No. 2, pp. 123-126, 2011

J. K. Nelson, “Dielectric polymer nanocomposites”, Eds. Springer, Heidelberg, Germany, 2010

K. Y. Lau, M. A. M. Piah, “Polymer nanocomposites in high voltage electrical insulation perspective: a review”, Malaysian Polymer Journal, Vol. 6, No. 1, pp. 58-69, 2011

R. Sarathi, R. K. Sahu, P. Rajeshkumar, “Understanding the thermal, mechanical and electrical properties of epoxy nanocomposites”, Materials Science and Engineering: A, Vol. 445-446, pp. 567-578, 2007

Y. Okazaki, M. Kozako, M. Hikita, T. Tanaka, “Effects of addition of nano-scale alumina and silica fillers on thermal conductivity and dielectric strength of epoxy/alumina microcomposites”, 10th IEEE International Conference on Solid Dielectrics (ICSD), Potsdam, Germany, pp. 1-4, 2010

J. K. Nelson, “The promise of dielectric nanocomposites”, IEEE International Symposium on Electrical Insulation, Toronto, pp. 452-457, 2006

Z. Han, J. W. Wood, H. Herman, C. Zhang, G. C. Stevens, “Thermal properties of composites filled with different fillers”, ISEI 2008, IEEE International Symposium on Electrical Insulation, Vancouver, pp. 497-501, 2008

S. Alapati, M. Joy Thomas, “Electrical treeing in polymer nanocomposites”, 15th National Power Systems Conference (NPSC), IIT Bomaby, pp. 351-355, 2008

M. G. Danikas, T. Tanaka, “Nanocomposites-a review of electrical treeing and breakdown”, IEEE Electrical Insulation Magazine, Vol. 25, No. 4, pp. 19-25, 2009

T. Tanaka, S. Kuge, M. Kozako, T. Imai, T. Ozaki, T. Shimizu, “Nano effects on PD endurance of epoxy nanocomposites”, International Conference on Electrical Engineering, Korea, Art. No. ME1-01, pp. 1-4, 2006

M. G. Danikas, “Surface Phenomena on resin-type insulators under different electrical and non-electrical stresses in the early stage of ageing”, Facta Universitatis, Vol. 13, No. 3, pp. 335-352, 2000

Y. Khan, “Degradation of hydrophobic properties of composite insulators in simulated arid desert environment”, International Journal of Engineering & Technology, Vol. 10, No. 1, pp. 86-90, 2010

R. Sarathi, M. G. Danikas, “Understanding discharge activity due to water droplet in epoxy nanocomposites using acoustic emission technique”, Journal of Electrical Engineering, Vol. 59, No. 6, pp. 294-301, 2008

Y. Cheng, X. Zhao, M. G. Danikas, D. D. Christantoni, P. Zairis, “A study of the behaviour of water droplets under the influence of uniform electric field in epoxy resin samples”, Journal of Electrical Engineering, Vol. 63, No. 3, pp. 196-200, 2012

M. Kozako, R. Kido, T. Imai, T. Ozaki, T. Shimizu, T. Tanaka, “Surface roughness change of epoxy/TiO2 nanocomposites due to partial discharges”, Proceedings of 2005 International Symposium on Electrical Insulating Materials, Kitakyushu, Japan, Vol. 3, pp. 661-664, 2005

P. Maity, S. Basu, V. Parameswaran, N. Gupta, “Degradation of polymer dielectrics with nanometric metal-oxide fillers due to surface discharges”, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 15, No. 1, pp. 52-62, 2008

M. Kozako, S. Kuge, T. Imai, T. Ozaki, T. Shimizu, T. Tanaka, “Surface erosion due to partial discharges on several kinds of epoxy nanocomposites”, Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Nashville, USA, pp. 162-165, 2005




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