Title :
Effects of nano filler on treeing phenomena of silicone rubber nanocomposites
Author :
Du, B.X. ; Ma, Z.L. ; Gao, Y. ; Han, T. ; Xia, Y.S.
Author_Institution :
Sch. of Electr. & Autom. Eng., Tianjin Univ., Tianjin, China
Abstract :
Polymer nanocomposite has recently drawn considerable attention because nanocomposites or nanostructured polymers have the potential of improving the electrical, mechanical, and thermal properties as compared to the neat polymers [1]. In this paper, the polymer nanocomposite was made by the mixed addition of SiO2 nanoparticle with the radio of 20 nm into room temperature vulcanized (RTV) silicone rubber (SiR), with the filler content from 0 to 5 wt% respectively. The typical needle-plate electrode was employed to investigate the relationship between electrical tree propagation characteristics and the content of nano filler with the ac voltage of 50 Hz. Both the structures and growth characteristics of electrical tree in SiR were observed by using a digital camera and a microscope system. Obtained results show that the distribution of tree structures is different between base SiR and its nanocomposites specimens. The growth speed varies a lot with the content of nano fillers, and there is an obvious improvement in tree initiation time as the increase of filler content. The possible reasons for the improvement in electrical tree growth and initiation time with the addition of nano fillers are discussed.
Keywords :
electrodes; nanocomposites; polymer insulators; silicon compounds; silicone rubber insulators; SiO2; digital camera; electrical properties; electrical tree growth; electrical tree propagation; frequency 50 Hz; mechanical properties; microscope system; nano fillers; nanocomposites specimens; nanofiller effects; nanoparticle; nanostructured polymers; needle-plate electrode; polymer nanocomposite; rubber nanocomposites; size 20 nm; temperature 293 K to 298 K; thermal properties; tree structures distribution; treeing phenomena; vulcanized silicone rubber; Electric breakdown; Electrodes; Nanocomposites; Needles; Polymers; Rubber; Vegetation; electrical tree; growth characteristics; initiation time; nanocomposites; silicone rubber;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2011 Annual Report Conference on
Conference_Location :
Cancun
Print_ISBN :
978-1-4577-0985-2
DOI :
10.1109/CEIDP.2011.6232774