Liquid metal (LM) can be well distributed in polyimide (PI) coatings by ultrasonic shear into 1–2 μm diameter. The LM incorporated PI (PI-LM) coatings show remarkably enhanced tribological properties when the coating slide against GCr15 steel ball at room temperature, while the mechanical properties are slightly reduced. When the filling amount is 8%, the wear is just 10% of pure PI and the friction coefficient can be reduced by 31.6%. During friction process, the LM microspheres are squeezed to the frictional interface and form a transfer film together with PI debris, achieving lower wear and friction coefficient. These results show that PI-LM coatings have high potential as advanced self-lubricating materials.

液态金属（LM）可以通过超声剪切成1–2μm直径而很好地分布在聚酰亚胺（PI）涂层中。当该涂层在室温下与GCr15钢球滑动时，掺有LM的PI（PI-LM）涂层显示出显着增强的摩擦学性能，而机械性能略有降低。当填充量为8％时，磨损仅为纯PI的10％，摩擦系数可以降低31.6％。在摩擦过程中，LM微球被挤压到摩擦界面，并与PI碎屑一起形成转移膜，从而降低了磨损和摩擦系数。这些结果表明，PI-LM涂层作为先进的自润滑材料具有很高的潜力。