Anti-wear additive, preparation method and application of anti-wear additive in engine lubricating oil

The invention belongs to the technical field of lubricating oil, and particularly relates to an anti-wear additive, a preparation method and application of the anti-wear additive in engine lubricating oil, the anti-wear additive is of a core-shell structure and comprises a liquid nano metal core and a dialkyl dithiophosphate shell which is adsorbed and coated outside the liquid metal core; wherein the liquid nano metal core is a gallium-based liquid nano metal liquid drop. The prepared anti-wear additive has excellent antifriction performance and anti-wear performance and high bearing capacity, the average friction coefficient is smaller than 0.05, and the corresponding abrasion loss is reduced by more than 90%. 本发明属于润滑油技术领域，具体涉及一种抗磨损助剂、制备方法及其在发动机润滑油的应用，抗磨损助剂为核壳结构，包括液态纳米金属核和吸附并包覆在液态金属核外的二烷基二硫代磷酸酯壳体；其中，液态纳米金属核为镓基液态纳米金属液滴。本发明制备的抗磨损助剂具有优异的减摩性能和抗磨损性能，具有高的承载能力，平均摩擦系数小于0.05，相应的磨损量损失降低超过90％。