Lubricants are an essential component in high-performance mechanical equipment, but traditional lubricants are becoming inadequate for meeting the increasing demands for anti-friction and anti-wear properties and they discharge harmful chemicals to the environment. The purpose of the present study was to explore the use of sepiolite as a novel oil additive to extend the performance of lubricants. Sepiolite nanofibers were first treated by acid followed by a dry air flow, aimed at increasing the pore volume and decreasing the particle size. Then the nanofibers were further modified by an organosilane coupling agent to reduce the surface free energy and to improve the dispersion stability in lubricant. A significant improvement in the performance of the lubricant was achieved by using the modified sepiolite nanofibers as an additive. When the amount of modified sepiolite nanofibers added was 1.5 wt.%, the best performance was demonstrated by the lubricant, showing a viscosity increase at 40°C and 100°C, and an increase in resistance to oxidation. Moreover, the acid value and pour point decreased, and the copper sheet corrosion level dropped to its lowest value.

中文翻译：

---

作为新型润滑剂添加剂的表面改性海泡石纳米纤维

润滑油是高性能机械设备的重要组成部分，但传统润滑油已无法满足日益增长的抗摩擦和抗磨性能需求，并且会向环境排放有害化学物质。本研究的目的是探索使用海泡石作为一种新型油添加剂来扩展润滑剂的性能。海泡石纳米纤维首先用酸处理，然后用干燥的空气流处理，目的是增加孔体积并减小粒径。然后通过有机硅烷偶联剂进一步改性纳米纤维以降低表面自由能并提高在润滑剂中的分散稳定性。通过使用改性海泡石纳米纤维作为添加剂，实现了润滑剂性能的显着改进。当改性海泡石纳米纤维的添加量为 1.5 wt.% 时，润滑剂表现出最佳性能，在 40°C 和 100°C 下粘度增加，抗氧化性增加。此外，酸值和倾点下降，铜板腐蚀程度降至最低值。