Ren Haohao, Zeng Huayi, Sun Chufeng, Yang Jianghong, Luo Xingping, Li Jia, Li Bin, Sheng Wenbo
Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, Gansu Province Research Center for Basic Sciences of Surface and Interface Chemistry, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730124, China.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Macromol Rapid Commun. 2025 Feb;46(4):e2400793. doi: 10.1002/marc.202400793. Epub 2024 Dec 23.
Water-based lubricants have the advantages of low cost, easy cleaning, and environmental friendliness, and are suitable for various lubrication applications. However, the limited tribological properties of pure water-based lubricants restrict their use. To improve these properties, water-based lubrication additives can be employed. Molybdenum disulfide (MoS) is widely used in tribology because of its stability, corrosion resistance, and wear resistance, but it has poor dispersion in water. To address this, MoS functionalized with poly(3-sulfopropyl methacrylate potassium salt) (MoS+PSPMA) is successfully prepared by grafting polymer brushes onto MoS using ultraviolet light. The results show that MoS+PSPMA exhibits significantly better dispersion stability in water compared to unmodified MoS. Additionally, MoS+PSPMA demonstrates superior tribological properties as a water-based lubrication additive. During reciprocating friction, MoS+PSPMA disperses effectively in water, forming a protective film on the wear surface that reduces friction. As an additive, MoS+PSPMA indicates good dispersion and a low friction coefficient in water, positioning it as a promising candidate for future water-based lubricants.
水基润滑剂具有成本低、易于清洁和环保等优点，适用于各种润滑应用。然而，纯水基润滑剂有限的摩擦学性能限制了它们的使用。为了改善这些性能，可以使用水基润滑添加剂。二硫化钼（MoS）因其稳定性、耐腐蚀性和耐磨性而在摩擦学中被广泛使用，但它在水中的分散性较差。为了解决这个问题，通过使用紫外线将聚合物刷接枝到MoS上，成功制备了用聚（3-磺丙基甲基丙烯酸酯钾盐）功能化的MoS（MoS+PSPMA）。结果表明，与未改性的MoS相比，MoS+PSPMA在水中表现出明显更好的分散稳定性。此外，MoS+PSPMA作为水基润滑添加剂表现出优异的摩擦学性能。在往复摩擦过程中，MoS+PSPMA在水中有效分散，在磨损表面形成保护膜，从而降低摩擦。作为添加剂，MoS+PSPMA在水中显示出良好的分散性和低摩擦系数，使其成为未来水基润滑剂的有前途的候选者。
