Environment-friendly oil for power capacitor as well as preparation method and application of environment-friendly oil

Abstract

The invention relates to the technical field of power capacitors, and particularly discloses environment-friendly oil for a power capacitor and a preparation method and application of the environment-friendly oil. The environment-friendly oil for the power capacitor comprises dioctyl adipate, benzyl toluene, diphenylethane, an organic silicon modifier and an antioxidant, and balance of dielectric property, gassing property, kinematic viscosity and stability is comprehensively realized through compounding of the components. Meanwhile, the scheme takes dioctyl adipate with high biodegradation rate as a main component, does not contain polycyclic aromatic hydrocarbon and halogen elements, has excellent environment-friendly characteristic, and meets the environment-friendly use requirement of power equipment. Besides, the invention further provides a preparation method of the environment-friendly oil for the power capacitor, the method adopts a combined process of vacuum degassing, ultrasonic dispersion, high-shear dispersion and slow cooling, the dissolved gas amount of the environment-friendly oil is remarkably reduced, the gassing performance is further optimized, and the service life of the environment-friendly oil is prolonged. The problem that the dielectric property, gassing property, kinematic viscosity and stability of existing environment-friendly oil are difficult to balance is solved.