Carbon quantum dot-loaded nano material lubricating additive and preparation method thereof

The invention discloses a carbon quantum dot-loaded nano material lubricating additive and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing antioxidant carbon quantum dots by utilizing one-step hydrothermal synthesis; 2, nickel hydroxide powder is prepared through a chemical precipitation method; and 3, ultrasonically stripping nickel hydroxide in an NMP (N-Methyl Pyrrolidone) solvent by using the carbon quantum dots as an auxiliary stripping agent to form the nickel hydroxide composite material loaded with the carbon quantum dots. According to the method, the carbon quantum dots are creatively used as a stripping aid, the layered nickel hydroxide material is ultrasonically stripped in the NMP solvent by controlling the temperature, and the stripping efficiency of the layered nickel hydroxide is improved, so that the dispersion performance of the layered nickel hydroxide in an oil product is greatly improved. A diphenylamine functional group grafted on the