Research on the Tribological Properties of Layered Kaolin Lubricant Additives

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-06-12 DOI:10.4271/04-17-01-0005

Yuqin Zhu, Li Zhang, Jian Chang, Xinming Wang, Wei Chai, Shaoze Song

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引用次数: 0

Abstract

Lubricant additives are the main means to improve the performance of lubricants. In this article, green and inexpensive layered kaolin were selected as lubricant additives, and the effects of the type of modifier, concentration, particle size of kaolin additives, and working temperatures on the tribological performance of lubricants were investigated. The results showed that the Span80 modifier can effectively improve the dispersibility and friction reduction effects of kaolin oil samples. Compared with kaolin oil samples without the modifier, the modified kaolin oil can reduce the friction coefficient by 40.9% and the wear spot diameter of the steel balls by 43.8%. The layered kaolin additive can significantly reduce the friction coefficient and wear of steel balls in lubrication, and the friction coefficient showed a trend of decreasing and then increasing with increasing kaolin additive concentration and particle size. The optimal added concentration and particle size of kaolin are 5 wt% and 2 μm, respectively, which can reduce the friction coefficient by 41.9% and 65.63% and the wear spot diameter by 12.31% and 50.72%, respectively, compared with the base oil. At five temperatures, compared with the base oil, the kaolin oil samples all showed better friction reduction and anti-wear properties. The micro and nano size of the kaolin additive, the layered structure, and the chemically reactive film generated on the surface are the main reasons for its good lubrication performance.

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层状高岭土润滑添加剂的摩擦学性能研究

润滑油添加剂是提高润滑油性能的主要手段。选用绿色廉价的层状高岭土作为润滑油添加剂，考察了改性剂种类、高岭土添加剂浓度、粒径、工作温度等因素对润滑油摩擦学性能的影响。结果表明，Span80改性剂能有效改善高岭土油样的分散性和减摩效果。与未添加改性剂的高岭土油相比，改性后的高岭土油摩擦系数降低了40.9%，钢球磨损斑直径降低了43.8%。分层高岭土添加剂能显著降低钢球在润滑过程中的摩擦系数和磨损，且摩擦系数随高岭土添加剂浓度和粒度的增加呈先减小后增大的趋势。与基础油相比，高岭土的最佳添加浓度和粒径分别为5 wt%和2 μm，可使摩擦系数分别降低41.9%和65.63%，磨损斑直径分别降低12.31%和50.72%。在5种温度下，与基础油相比，高岭土油样品均表现出更好的减摩和抗磨性能。高岭土添加剂的微纳米尺寸、层状结构以及表面生成的化学反应膜是其具有良好润滑性能的主要原因。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.