Low-temperature-resistant graphene lubricating oil and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil and discloses low-temperature-resistant graphene lubricating oil and a preparation method thereof. The lubricating oil comprises, by weight, 70-80 parts of base oil, 10-15 parts of modified graphene, 3-6 parts of sepiolite powder, 1-3 parts of di-n-butyl phosphite anti-wear agent, 1-2 parts of polymethacrylate pour point depressant, 0.5-1 part of siloxane defoamer and 0.5-1 part of aromatic amine antioxidant. According to the preparation method, firstly, the modified graphene, the sepiolite powder and the base oil are added into astirrer to be stirred and dispersed, then the di-n-butyl phosphite anti-wear agent, the polymethacrylate pour point depressant, the siloxane defoamer and the aromatic amine antioxidant are added, themixture continues to be stirred and dispersed, and the lubricating oil is obtained. According to the lubricating oil, the graphene can be dispersed at a high degree, and the lubricating oil has goodlubricating performance and low-temperature flowing performance.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a low-temperature resistant graphene lubricating oil and a preparation method thereof. Background technique [0002] Lubricating oil is generally composed of base oil and additives. The main component is base oil. The quality of base oil determines the properties of lubricating oil, while additives mainly improve the properties of lubricating oil and make up for the lack of performance. The main functions of lubricating oil are: 1. Lubricating oil can reduce mechanical friction. Adding lubricating oil to the friction surface can reduce resistance, reduce energy consumption, reduce damage, and reduce friction; 2. Lubricating oil can absorb heat generated by friction and has the function of cooling Cooling effect; 3. Lubricating oil spreads on the surface of mechanical parts to form a protective film to prevent the erosion of moisture in the air and prevent oxidation and ru...

AI Technical Summary

Problems solved by technology

However, the existing problem is that graphene is prone to agglomeration due to its flake structure, and ordinary dispersants cannot effectively disperse graphite; The effect of coagulant on improving the low-temperature fluidity of lubricating oil is not significant, and the low-temperature resistance performance of lubricating oil needs to be further improved

[0003] Chinese Patent Publication No. CN106479652 discloses a preparation method of degradable lubricating oil for vehicles. Emulsifier, extreme pressure machine, antioxidant, anti-corrosion rust agent, flake graphite and water, but the thicker flake graphite has not been stripped and dispersed, so the lubricating performance of lubricating oil is less improved; China Patent Publication No. CN106010755 discloses a joint lubricating oil for injection molding machines, which is prepared from the following raw materials in parts by weight: mineral base oil, nonylphenol polyoxyethylene ether, hexachlorocyclopentadiene, ethanedithiol, propolis extraction It is prepared from chemical substances, seaweed extract, graphene, modified zircon powder, methyl carbamate, and benzimidazole, among which the dispersed thinner graphene flakes are obtained by ultrasonic method, but graphene flakes are easy to Secondary agglomeration occurs, causing the lubricating performance of lubricating oil to decline; Chinese Patent Publication No. CN105733777 discloses a special lubricating oil for cryogenic pumps, which is prepared from base oil, composite additives, pour point depressant, thickener, and cold-resistant agent. The pour point depressant improves the low-temperature fluidity of lubricating oil by preventing some wax crystals from forming a three-dimensional cross-linked network structure, but the pour point depressant can only prevent part of the wax crystals from forming a three-dimensional cross-linked network structure. Performance cannot be significantly improved