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

Abstract

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 surface of the carbon quantum dot can be used as an antioxidant for slowing down oxidative cracking of an oil product, and meanwhile, the carbon quantum dot loaded nickel hydroxide composite material prepared after ultrasonic exfoliation can effectively improve the lubricating property of the oil product when being used as a lubricating oil additive due to the friction synergistic effect of carbon sphere particles and a layered material. The preparation method of the material is simple to operate, wide in raw material source, safe, pollution-free and easy for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a nickel hydroxide composite material lubricating additive loaded with carbon quantum dots and a preparation method thereof. Background technique [0002] Nickel hydroxide belongs to a two-dimensional layered structure. Since the layered structure material is easy to slip between layers and has a certain strength in the layer, it can become a potential lubricating material. At present, it has been studied that adding nickel hydroxide as an additive to the base oil can form a friction film on the friction surface to improve the lubricating performance. However, the layered structure material is easy to accumulate between layers during the friction process, so that it will hinder the friction between the friction pairs, and the dispersion in the base oil is poor, so the dispersion of the layered structure material in the oil is improved. Performance and tribological pr...

AI Technical Summary

Problems solved by technology

However, carbon quantum dots and their hybrid nanomaterials have a certain polarity, and most reports apply them to certain polar lubricants, without the universality of carbon quantum dots in various base oils. To explore, by combining the respective advantages of carbon quantum dots and layered materials, the use of synergistic effects to prepare new composite materials for the field of tribology also has great research value

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