Abstract This work reports thermal stability, traction and tribofilm formation properties of three fatty acid-derived ionic liquids (FAILs) and evaluates the influence of the chemical structure of the anion on the properties indicated above. The results indicated that thermal stability of the FAILs is related with the chemical structure of the anion (longer alkyl chain length increases thermal stability and the presence of double bond decreases it). At high temperatures and low speeds, the [N8,8,8,1][C6:0] led to the lowest traction values and the [N8,8,8,1][C18:1] had the highest ones. All FAILs reacted with the steel surfaces creating a tribofilm, that increased with time.

中文翻译：

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三种脂肪酸衍生离子液体的热稳定性、牵引力和摩擦膜形成

摘要 这项工作报告了三种脂肪酸衍生的离子液体 (FAIL) 的热稳定性、牵引力和摩擦膜形成特性，并评估了阴离子的化学结构对上述特性的影响。结果表明，FAILs的热稳定性与阴离子的化学结构有关（较长的烷基链长度增加热稳定性，双键的存在降低热稳定性）。在高温和低速下，[N8,8,8,1][C6:0] 的牵引力值最低，而 [N8,8,8,1][C18:1] 的牵引力值最高。所有失败都与钢表面发生反应，形成摩擦膜，随着时间的推移而增加。