Superlubricating materials can greatly reduce the energy consumed and economic losses by unnecessary friction. However, a long pre-running-in period is indispensable for achieving superlubricity; this leads to severe wear on the surface of friction pairs and has become one of the important factors in the wear of superlubricating materials. In this study, a polyethylene glycol-tannic acid complex green liquid lubricant (PEG10000-TA) was designed to achieve macroscale superlubricity with an ultrashort running-in period of 9 s under a contact pressure of up to 410 MPa, and the wear rate was only 1.19 × 10⁻⁸ mm³·N⁻¹·m⁻¹. This is the shortest running-in time required to achieve superlubricity in Si₃N₄/glass (SiO₂). The results show that the strong hydrogen bonds between PEG and TA molecules can significantly reduce the time required for the tribochemical reaction, allowing the lubricating material to reach the state of superlubrication rapidly. Furthermore, the strong hydrogen bond can share a large load while fixing free water molecules in the contact zone to reduce shear interaction. These findings will help advance the use of liquid superlubricity technology in industrial and biomedical.

超级润滑材料可以大大减少不必要的摩擦所消耗的能量和经济损失。然而，为了获得超润滑性，长时间的预磨合是必不可少的；这导致摩擦副表面严重磨损，已成为超润滑材料磨损的重要因素之一。本研究设计了一种聚乙二醇-单宁酸复合绿色液体润滑剂 (PEG10000-TA)，可在高达 410 MPa 的接触压力下以 9 s 的超短磨合期实现宏观超润滑，磨损率为只有 1.19 × 10 ⁻⁸ mm ³ ·N ⁻¹ ·m ⁻¹。_{这是在 Si 3} N中实现超润滑所需的最短磨合时间₄ /玻璃（SiO ₂）。结果表明，PEG和TA分子之间的强氢键可以显着减少摩擦化学反应所需的时间，使润滑材料迅速达到超润滑状态。此外，强氢键可以分担较大的载荷，同时在接触区固定游离水分子以减少剪切相互作用。这些发现将有助于推进液体超润滑技术在工业和生物医学中的应用。