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Rheological and Wettability Properties of Engine Oil with a Submicron Spherical Carbon Particle Lubricant Mixture
International Journal of Automotive Technology ( IF 1.6 ) Pub Date : 2020-11-12 , DOI: 10.1007/s12239-020-0139-z
Abdullah Awad Alazemi , Feras Ghazi Alzubi , Abdulsalam Alhazza , Arthur Dysart , Vilas Ganpat Pol

This study examined the physical and chemical properties of engine oil with a submicron-sized carbon particle lubricant mixture. Spherical carbon particles were added to engine oil to lower the friction and wear losses. In the current study, morphological and chemical analyses of these carbon particles were performed using field emission scanning electron microscopy and energy dispersive spectroscopy. The results clearly demonstrated that these spherical particles consist of a pure carbon element. In addition, the size distribution and dispersion stability of the carbon particles in the engine oil were investigated. The results revealed that the carbon particles have a diameter in the range of 200 to 700 nm, and they maintain their suspension in the engine oil for about 240 hours without using surfactants. Rheological studies were conducted to explore the effect of carbon particles on the rheological properties of the baseline oil at different temperatures and shear rates. The viscosity measurements, at temperature ranging from 5 to 60 °C, for the baseline oil and the oil-carbon particle lubricant mixture were almost identical (less than 4 % difference). Furthermore, a wettability analysis was performed to examine the effect of carbon particles on the wetting behavior of the baseline oil on a steel substrate.



中文翻译:

亚微米球形碳颗粒润滑剂混合物的机油流​​变学和润湿性

这项研究检查了亚微米尺寸碳颗粒润滑剂混合物的发动机油的物理和化学性质。将球形碳颗粒添加到发动机油中,以降低摩擦和磨损损失。在当前的研究中,使用场发射扫描电子显微镜和能量色散光谱法对这些碳颗粒进行了形态和化学分析。结果清楚地表明,这些球形颗粒由纯碳元素组成。另外,研究了机油中碳颗粒的尺寸分布和分散稳定性。结果表明,碳颗粒的直径在200至700nm范围内,并且它们在不使用表面活性剂的情况下在发动机油中保持悬浮约240小时。进行了流变学研究,以探讨碳颗粒在不同温度和剪切速率下对基准油流变性质的影响。在5至60°C的温度范围内,基准油和油-碳颗粒润滑剂混合物的粘度测量值几乎相同(相差小于4%)。此外,进行了润湿性分析,以检查碳颗粒对钢基材上基准油的润湿行为的影响。

更新日期:2020-11-12
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