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.