High performance lubricating oil based on graphene and magnetic rare earth nanocomposite additives

Abstract

The invention relates to the technical field of lubricating oil, in particular to a high-performance lubricating oil based on graphene and magnetic rare earth nano-composite additives. The present invention utilizes the synergistic lubrication of the composite additives of nano-graphene and NdFeB to overcome the deficiency of each single additive in the use of lubricating oil, and has the following advantages compared with various existing lubricating oil products: first, its comprehensive performance is better At the same time, it has good intelligent repair characteristics, which can repair the worn out engine; in addition, it also has great advantages in environmental protection.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a high-performance lubricating oil based on graphene and magnetic rare earth nano-composite additives. Background technique [0002] In recent years, nano-additives have become a scientific hotspot in the field of lubricating oil additives, and excellent lubricating oil additives based on nano-rare earth compounds, nano-graphite flakes, molybdenum disulfide, etc. have been produced, which has pushed lubricating oil technology to a new development space. However, these above-mentioned nano lubricating oil additives often have various limitations or defects. [0003] For example, nano-graphite flakes have high wear-reducing properties, but poor wear-resisting properties, and are difficult to disperse, and are prone to agglomeration and segregation in the actual use of the engine, making the lubricating oil additives based on nano-graphite flakes Effectiveness is greatly l...

AI Technical Summary

Problems solved by technology

However, there are often various limitations or defects in the above-mentioned nano lubricating oil additives

[0003] For example, nano-graphite flakes have high wear-reducing properties, but poor wear-resisting properties, and are difficult to disperse, and are prone to agglomeration and segregation in the actual use of the engine, making the lubricating oil additives based on nano-graphite flakes Effectiveness is greatly limited and can even have negative effects

Although the use of graphene instead of nano-graphite can theoretically obtain a better lubricating effect per unit mass of additives, it cannot overcome the shortage of extreme pressure properties, and the long-term stability of graphene additives dispersed in base oils is rarely reported, especially In the actual use of high-power or high-heat (such as with Turbo) engines, they tend to gradually stack as the service temperature changes

[0004] Another example is that nano-rare earth compounds have good anti-wear and compression properties, but their own thermal conductivity is low, and the adsorption on the surface of the friction pair reduces the thermal conductivity of the interface. The loss of lubricating oil and side reactions are increased under working conditions, so that the oil film resistance under boundary lubrication conditions will not increase but decrease

[0005] Therefore, although the concept of lubricating oil additives based on high-tech nanomaterials is common, successful product cases are rare

It can be seen that the traditional empirical addition of a single / simple nano-additive has been difficult to meet the increasing expectations of various industries for high-performance lubricants

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