Abstract To understand the electroosmosis effect of lubricants at friction interfaces, the tribological characteristics of aqueous lubricants and SiO2 nanolubricants containing an electroosmotic promoter, 3-[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate (CHAPS), and an electroosmotic suppressant, cetyltrimethylammonium bromide (CTAB), were examined using a four-ball tribometer. The results show that CHAPS lubricants produce reductions in the friction coefficient and wear scar diameter, whereas CTAB lubricants exhibit the opposite behavior. The variation in tribological performance under a steel/ceramic contact is more significant than that under a steel/steel contact. A worn surface analysis indicates that a SiO2-based tribofilm is formed with CHAPS nanolubricants, whereas the tribofilm is hardly observed with CTAB nanolubricants. This is attributed to the capillary electroosmosis effect induced by the self-excited electric field formed at friction interfaces, which affects the penetrability of lubricants.

中文翻译：

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电渗添加剂对钢/钢和钢/陶瓷摩擦界面处润滑剂毛细管渗透的影响

摘要 为了了解润滑剂在摩擦界面的电渗效应、水性润滑剂和含有电渗促进剂、3-[(3-胆酰胺丙基)-二甲基氨基]-1-丙磺酸盐 (CHAPS) 和电渗抑制剂的 SiO2 纳米润滑剂的摩擦学特性，使用四球摩擦计检测十六烷基三甲基溴化铵 (CTAB)。结果表明，CHAPS 润滑剂会降低摩擦系数和磨痕直径，而 CTAB 润滑剂则表现出相反的行为。钢/陶瓷接触下摩擦学性能的变化比钢/钢接触下的变化更显着。磨损表面分析表明，使用 CHAPS 纳米润滑剂形成基于 SiO2 的摩擦膜，而使用 CTAB 纳米润滑剂几乎观察不到摩擦膜。