Thermal stability of fullerene nano-modified vegetable insulating oil

摘要

Vegetable insulating oil as a new environment-friendly and excellent electrical properties liquid insulating medium has been used widely in transformers. In order to study the stability of vegetable oil modified by C60 nanoparticles in transformers under normal operation, the thermal aging experiments of modified vegetable insulating oil were conducted. The variation characteristics of dielectric properties and acid value influenced by different aging times were obtained. TGA and DTG of modified oil and the blank sample in different atmosphere were analyzed. Experimental results indicated that the thermal stability of vegetable insulating oil has been improved in general because of the addition of C60 nanoparticles. But the use of nanoparticles modified needs a degassing process to avoid adsorbing oxygen by hollow structure of C60 nanoparticles.