Nano-SiC modified high-thermal-conductivity corn insulating oil and preparation method thereof

The invention relates to the technical field of high voltage and insulation, and particularly discloses nano-SiC modified high-thermal-conductivity corn insulating oil and a preparation method thereof. The method comprises the following steps: (1) heating nanometer sodium silicate and SiC nanoparticles and carrying out mixing and ball milling; (2) adding oleic acid into a mixture obtained after mixing and ball milling, continuing heating, carrying out mechanic stirring, and then performing ultrasonic treatment; (3) filtering the mixture having been subjected to ultrasonic oscillation in the step (2), performing washing with ethanol, and carrying out drying to obtain modified SiC nanoparticles; (4) mixing the modified SiC nanoparticles with sodium hydroxide, a coupling agent and water, and performing uniform ultrasonic oscillation to form a mixed solution; (5) carrying out vacuum filtration on the corn insulating oil at room temperature; and (6) adding the mixed solution obtained in the step (4) into the corn