Surface insulation performance of epoxy resin/silica nanocomposite material

Yan, W., Phung, B. T., Han, Z. J., & Ostrikov, K. (2011) Surface insulation performance of epoxy resin/silica nanocomposite material. In 2011 Electrical Insulation Conference (EIC), IEEE, Annapolis, MD, pp. 235-239.

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Composite polymer insulators provide many advantages over the traditional porcelain insulators and they are increasingly being used at both transmission and distribution levels. In the present paper, an epoxy resin/silica nanocomposite dielectric material (NDM) structure is proposed and fabricated. Hydrophobic fumed silica is incorporated in epoxy resin matrix and acetone is adopted as media agent to effectively achieve homogenous dispersion of the nano-scale silica filler. The acetone also acts as diluents to reduce viscosity before the curing phase of epoxy resin and enables bubbles to escape from being trapped. Through partial discharge (PD) and surface aging tests, it is illustrated that the inception of surface discharge of the proposed NDM is relatively higher than that of the non-filled counterpart, and a better PD resistivity was observed in the negative half cycle regarding to applied AC voltage. Results of surface aging test indicate that surface discharge activity is retarded over the test conducting time. By contrast, surface discharge developed to the opposite way on the non-filled sample. Therefore, the proposed NDM could provide better safety reliability and lower maintenance cost to industrial application compared with nonfilled conventional epoxy resin.

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ID Code: 73684
Item Type: Conference Paper
Refereed: Yes
Keywords: dielectric, nanocoposite, partial diacharge, surface aging
DOI: 10.1109/EIC.2011.5996153
ISBN: 9781457702785
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 10 Jul 2014 04:29
Last Modified: 11 Jul 2014 04:23

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