A Study on Microstructure, Friction and Rheology of Four Lithium Greases Formulated with Four Different Base Oils

被引：32

作者：

Zhang, Enhui ^{[1
,2
]}

Li, Weimin ^{[1
,2
]}

Zhao, Gaiqing ^{[1
,2
]}

Wang, Zhe ^{[1
,2
]}

Wang, Xiaobo ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Qingdao Ctr Resource Chem & New Mat, Qingdao 266100, Peoples R China

来源：

TRIBOLOGY LETTERS | 2021年 / 69卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Base oil; Lithium grease; Friction; Rheology; Noise property; FREQUENCY MAGNETIC-FIELD; LUBRICATING GREASE; FILM THICKNESS; THICKENER; GEL;

D O I：

10.1007/s11249-021-01469-z

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Four lithium greases were prepared with paraffinic oil, naphthenic oil, poly-alpha-olefin (PAO) and polyol ester (PE), respectively. Their physiochemical, tribological and rheological properties were investigated. It was found that naphthenic oil-based grease exhibited the best colloidal stability. SEM analysis revealed that lithium fibers in PE-based grease showed a relatively flat network compared to the three-dimensional entangled structure of the other three greases. Tribological performance of greases differed from their corresponding base oils, which might be attributed to the different microstructure of lithium soap fibers. Three-dimensional entangled structure was more suitable for friction-reducing than flat network structure. Moreover, noise test revealed that naphthenic oil-based grease was suitable for low-noise bearing lubrication. This study provided fundamental guidance for the selection of base oil which is beneficial for the development of high-performance grease products.

引用

页数：9