Ultra fine silica particles, whose diameter is less than 0.2lm to nano (1-100nm), not only have the properties of ordinary silica, but also have some unique properties, such as surface effect, volume effect, small size effect, quantum size effect and macro quantum tunneling effect. These characteristics make it widely used in the fields of rubber, plastics, coatings, adhesives, biomedicine and catalysts. In addition, because ultra-fine silica can work under heavy load, low speed and high temperature, it is also a high-performance and environmental friendly lubricant additive with great development potential. However, the research on ultra-fine silica as a lubricant additive is still in the experimental stage.


Because the surface of ultra-fine silica has strong hydrophilicity, large specific surface area and high surface energy, it is easy to be added to the polymer matrix, thus affecting the mechanical, optical and electrical properties of the composite. Modifying the surface of ultra-fine silica can improve its shortcomings of easy agglomeration and poor dispersion, and make it obtain better dispersion and compatibility in organisms. According to the existing research, the modified white carbon black has excellent friction properties, which can significantly improve the friction resistance and extreme pressure wear resistance of the lubricant. After modification, it can make its surface functionalized, so as to improve the comprehensive properties of the material and better apply it to the progress of material quality.