Fluorinated SnO2/ER as an antistatic coating for enhancing the surface insulating strength of epoxy insulators

Abstract

The surface coating of epoxy resin has been widely used in the composite materials with micron scale fillers, but the related research on the composite coating filled with nanoparticles is still rare. SnO 2 is a common antistatic additive in composite materials, and it is also a semiconductor material, capable of uniform voltage. In this paper, nano-SnO 2 powder was considered as the filler of coating materials. By analyzing the microscopic test results, the flashover voltage, surface charge dissipation, and surface conductivity of the coating sample, the effects of coating treatment and nano-SnO 2 fluorination on the surface insulation properties of epoxy insulators were studied. It is found that the flashover voltage and surface charge dissipation rate of the coating sample can be improved by both coating treatment and fluorination treatment, thus improving the surface insulation performance of epoxy insulators. The modification process and test results have guiding significance for improving the surface insulation performance of epoxy insulators.

Enhanced surface insulation for SiO2/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

“…Many reports [26,33,38,39] show that the trap energy level has an important effect on charge migration. It is known that the trap can capture charge, and the trapped charges will break through the barrier of the trap and escape only when obtains enough energy.…”

“…As shown in figure 8, we compare the increase of flashover voltage with the existing works on flashover voltage improvement in recent years. Studies [14,33,36,37] and [29,[38][39][40][41] refer to the doping of chemically modified and plasmamodified fillers, respectively. Research of [25,[42][43][44][45][46] chose direct surface modification by coating or plasma treatment.…”

Enhanced direct‐current breakdown strength of Al2O3/epoxy resin composites through plasma fluoridation of fillers interface

“…Doping with nano-fillers (such as SnO 2 , [8] TiO 2 , [9] Al 2 O 3 , [10][11][12] ZnO, [13] etc.) with only a small amount reinforced the DC breakdown strength of the polymer matrices to a certain extent, [14][15][16] which benefited from the interface forces of the fillers-matrices.…”