The applications of ionic liquids (ILs)/lamellar liquid crystals (LLCs) have great potential in nanotribology because they could be used where conventional oils could not work. To clarify the lubricating mechanism, herein, ILs/LLCs lubricants were prepared by addition of amphiphilic 1-alkyl-3-methylimidazolium hexafluorophosphate (C_nmimPF₆, n = 8, 12) into TritonX-100/n-C₁₀H₂₁OH/H₂O LLCs with different concentration. The influence of alkyl chain lengths of ILs on the microstructures and the tribological properties of LLCs were investigated. The phase structure parameters and the tribological properties of the LLCs in the presence of C_nmimPF₆ were analyzed via freeze-fracture transmission electron microscopy (FF-TEM), the small-angle X-ray scattering (SAXS) technique, oscillating reciprocating friction and wear tester. Compared with the LLCs without C_nmimPF₆, 4.5 wt% C_nmimPF₆ /LLCs can reduce the friction and wear of sliding pairs. The better lubricating property and antiwear capability of the C_nmimPF₆/LLCs may be attributed to the increasing of the interlayer thickness d and the decreasing of the bilayer thickness d₀ in microstructures. This work provides a better understanding of the relationship between the microstructures and friction wear performances of ILs/LLCs.

离子液体（ILs）/层状液晶（LLCs）的应用在纳米摩擦学中具有巨大的潜力，因为它们可用于常规油无法工作的地方。为了阐明润滑机理，在这里，ILs / LLCs润滑剂是通过向TritonX-100 / nC ₁₀ H ₂₁ OH / H中添加两亲性的1-烷基-3-甲基咪唑六氟磷酸盐（C _n mimPF ₆，n = 8，12 ）来制备的₂ O LLCs，具有不同的浓度。研究了ILs的烷基链长度对LLCs的微观结构和摩擦学性能的影响。C _n mimPF ₆存在下LLC的相结构参数和摩擦学特性通过冷冻断裂透射电子显微镜（FF-TEM），小角X射线散射（SAXS）技术，振荡往复摩擦和磨损测试仪进行了分析。与不具有C _n mimPF _6的LLCs相比，4.5 wt％C _n mimPF ₆ / LLCs可以减少滑动副的摩擦和磨损。C _n mimPF ₆ / LLCs更好的润滑性能和抗磨性能可能归因于中间层厚度d的增加和双层厚度d ₀的减小在微结构中。这项工作可以更好地理解ILs / LLCs的微观结构与摩擦磨损性能之间的关系。