This invention relates to an insulating oil and an oil-paper
insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of
electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are
silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the
oil phase through
silane modification. Adding
silane-modified nanoparticles to the insulating oil effectively reduces the
water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall
electrical performance and service life of the oil-paper
insulation system are significantly improved.