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New insight to the tribology-structure interrelationship of lubricating grease by a rheological method

机译：流变方法研究润滑脂的摩擦学-结构相互关系

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摘要

By controlling the heat-treatment process, three types of lithium greases with different thickener fiber morphologies were synthesized via the saponification reaction. With increasing the cooling rate, the dimension of the thickener fiber decreased. The relationship between microstructure and tribological performance of the lubricating greases was investigated via a rheological method. The results indicated that the fiber dimension determined the level of physical entanglement and the evolution of fiber network in the friction process, further influencing the final lubricity. The grease with the large fiber dimension displayed good tribological performance under low frequency and high load conditions due to its large-scale strongly crosslinked structure. In addition, the grease with the small fiber dimension yielded a low level of fiber physical entanglements and displayed low structure strength and fast response in the rheological test. It could obviously improve the tribological performance under high frequency conditions. Through tuning the microstructure of the thickener fiber according to the lubricating conditions, the tribological performance could be obviously improved.
机译：通过控制热处理过程，通过皂化反应合成了三种增稠剂纤维形态不同的锂基润滑脂。随着冷却速率的增加，增稠剂纤维的尺寸减小。通过流变学方法研究了润滑脂的微观结构与摩擦学性能之间的关系。结果表明，纤维尺寸决定了物理缠结的程度和摩擦过程中纤维网络的演化，进一步影响了最终的润滑性。纤维尺寸大的润滑脂由于其大规模的强交联结构，在低频和高负荷条件下显示出良好的摩擦学性能。此外，纤维尺寸小的润滑脂产生的纤维物理缠结程度低，在流变测试中显示出较低的结构强度和快速响应。可以明显改善高频条件下的摩擦学性能。通过根据润滑条件调整增稠剂纤维的微观结构，可以显着提高摩擦性能。

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