Spherical nano-MoS₂ (S-MoS₂) has excellent lubricating properties and potential application value in engine oil additives. Engine soot can enter the engine oil, so the tribological interaction between S-MoS₂ and diesel combustion soot (DCS) should be investigated. In this study, DCS was used to simulate engine soot. The interaction was investigated in dioctyl sebacate (DOS), and the interaction mechanism was full characterized. Results showed that S-MoS₂ and DCS had obvious antagonism effects on lubrication. The 0.5% S-MoS₂ exhibited good lubricating properties in DOS, which could reduce friction by ∼22% and wear by ∼54%. However, after 0.5% S-MoS₂ was added to the 0.5% DCS contaminated DOS, the lubrication performance was not improved and was even worse than that without S-MoS₂. When S-MoS₂ was added for DOS lubrication, a tribofilm containing MoS₂ formed on the friction surface, but simultaneously adding 0.5% DCS resulted in the disappearance of the MoS₂ tribofilm. Moreover, under the action of friction heat, DCS and S-MoS₂ could form hard Mo_xC_y, thereby increasing abrasive wear. Finally, a preliminary deantagonism method was provided. After 2.0% zinc isooctyl dithiophosphate was added to the above antagonistic system, the friction coefficient did not show visible changes, but the wear recovered to a level close to that when only S-MoS₂ was added. The antiantagonism method is not very satisfactory and some more efficient methods need to be further explored.

球形纳米MoS ₂ (S-MoS ₂ )具有优异的润滑性能，在发动机油添加剂中具有潜在的应用价值。发动机烟炱可以进入发动机油，因此应研究S-MoS ₂和柴油燃烧烟炱（DCS）之间的摩擦相互作用。在本研究中，DCS 用于模拟发动机烟灰。在癸二酸二辛酯（DOS）中研究了相互作用，并充分表征了相互作用机制。结果表明，S-MoS ₂和DCS对润滑有明显的拮抗作用。 0.5% S-MoS ₂在DOS下表现出良好的润滑性能，可减少~22%的摩擦和~54%的磨损。然而，在0.5%DCS污染的DOS中添加0.5%S-MoS ₂后，润滑性能并没有改善，甚至比未添加S-MoS ₂的情况更差。当添加S-MoS ₂进行DOS润滑时，摩擦表面形成了含有MoS ₂的摩擦膜，但同时添加0.5％DCS导致MoS ₂摩擦膜消失。此外，在摩擦热的作用下，DCS和S-MoS ₂会形成硬质Mo _x C _y ，从而增加磨料磨损。最后提出了初步的去拮抗方法。在上述拮抗体系中添加2.0%异辛基二硫代磷酸锌后，摩擦系数没有出现明显的变化，但磨损量恢复到接近仅添加S- _MoS2时的水平。抗拮抗方法还不是很令人满意，需要进一步探索一些更有效的方法。