Polyurethane (PU) microcapsules containing [BMIm]PF₆ as a lubricant have been fabricated by interfacial polymerization. The stabilizing effect of 10 kinds of emulsifiers towards [BMIm]PF₆ ionic liquid have been delineated. A Pickering emulsion stabilized by lignin showed the best emulsification effect on highly viscous [BMIm]PF₆. The types and reactivities of monomers have an important influence on the formation of microcapsules. Three kinds of isocyanate (IPDI, MDI, TDI) were reacted with diamines or diols to prepare the PU microcapsules in this work. The optiaml [BMIm]PF₆@PU microcapsules were obtained when using IPDI and TETA as monomers, under conditions of 5,000 rpm emulsifying rate, 0.5 wt% concentration of lignin Pickering emulsion, and a 3:1 mass ratio of [BMIm]PF₆/IPDI. The synthesized microcapsules have a regular and compact spherical structure, smooth outer, and inner surfaces with a mean diameter of 43 ± 15 µm, and a thickness of 3.8 µm. The core content of [BMIm]PF₆@PU microcapsules was determined as >70%, and the initial decomposition temperature was 300 °C. The [BMIm]PF₆ ionic liquid shown excellent lubricating property, ultralow friction coefficient (decreased by 72.7%) and wear rate (decreased by 160 times) were obtained by embedding 30 wt% microcapsules into epoxy compared with pure epoxy.

含有[BMIm] PF ₆作为润滑剂的聚氨酯（PU）微囊已经通过界面聚合制备。描述了10种乳化剂对[BMIm] PF ₆离子液体的稳定作用。木质素稳定的Pickering乳液对高粘度[BMIm] PF ₆表现出最佳的乳化效果。单体的类型和反应性对微胶囊的形成具有重要影响。在这项工作中，将三种异氰酸酯（IPDI，MDI，TDI）与二胺或二醇反应以制备PU微胶囊。最佳[BMIm] PF ₆当使用IPDI和TETA作为单体时，在5,000 rpm的乳化速率，0.5 wt％的木质素Pickering乳液浓度和3：1质量比的[BMIm] PF ₆ / IPDI的条件下，获得@PU微胶囊。合成的微胶囊具有规则且致密的球形结构，光滑的外表面和内表面，平均直径为43±15 µm，厚度为3.8 µm。[BMIm] PF ₆ @PU微胶囊的核心含量确定为> 70％，初始分解温度为300°C。与纯环氧树脂相比，通过将30 wt％的微胶囊嵌入环氧树脂中，[BMIm] PF ₆离子液体显示出优异的润滑性，超低摩擦系数（降低72.7％）和磨损率（降低160倍）。