532 / 2022-03-28 19:38:36

Effect of Ultraviolet Irradiation Modification on Surface Flashover Voltage of Epoxy Resin

surface modification, surface flashover, epoxy resin, UV radiation

Purpose/Aim

The vacuum surface flashover phenomenon of solid insulating media has always been a fundamental problem in the field of high voltage insulation. Therefore, study of the vacuum flashover mechanism of solid insulating media, proposing the theory and method of improving surface flashover performance of vacuum insulation of solid insulating media is of great significance for the safe operation of power equipment.

Experimental/Modeling methods

In this research, a Ultraviolet irradiation surface modification technique is proposed, which carries out ultraviolet irradiation of epoxy resin samples for different lengths of ultraviolet irradiation in an aerobic environment. After that, the surface morphology of the samples after different irradiation duration was observed by scanning electron microscope, the chemical structure of the samples was tested by infrared spectroscopy tester and water contact Angle tester, and the vacuum flashover voltage of the samples after different irradiation duration was measured.

Results/discussion

Experimental results show that Ultraviolet irradiation in the aerobic environment can change the surface morphology of epoxy resin samples, and generate oxygen-containing groups on the surface of the sample.  As the irradiation time increases, the flashover voltage increases first and then decreases, the flashover voltage can be increased by more than 20%.

Conclusions

The results show that UV irradiation for a specific duration under aerobic conditions can effectively increase the surface flashover voltage of epoxy resin by affect the physical morphology and chemical structure on the surface of the epoxy resin.