含少层石墨烯锂基润滑脂摩擦学与流变学性能研究  

Study on Friction and Rheological Properties of Lithium-based Lubricating Grease with Few-Layer Graphene

作　　者：王霞[1] 李占君[1] WANG Xia;LI Zhanjun(College of Mechanical Engineering,Anyang Institute of Technology,Anyang Henan 455000,China)

机构地区：[1]安阳工学院机械工程学院,河南安阳455000

出　　处：《润滑与密封》2024年第10期135-140,共6页Lubrication Engineering

基　　金：安阳工学院博士启动基金项目(BSJ2022023)。

摘　　要：为了研究少层石墨烯对锂基润滑脂摩擦学与流变学性能的影响,通过机械搅拌、超声分散及三辊研磨的方式制备不同质量分数的少层石墨烯改性锂基润滑脂,利用MR-10型四球试验机和DHR-2旋转式流变仪分别考察其摩擦学性能和流变学性能。结果表明:少层石墨烯的加入可以有效提高锂基润滑脂的减摩抗磨性能,当少层石墨烯的质量分数为0.1%时效果最佳;少层石墨烯的加入,显著增加了润滑脂流动点对应的应变值和破坏润滑脂皂纤维所需的能量,以及皂纤维结构破坏后恢复所需要的时间。对试验数据进行回归分析,建立基于Herschel-Bulkley模型的不同质量分数少层石墨烯改性锂基润滑脂的流动方程。In order to study the effect of graphene on the tribological and rheology properties of lithium based greases,lithium-based greases modified with different mass fraction of few-layer graphene were prepared by mechanical stirring,ultrasonic dispersion and three-roll grinding,and their tribological and rheological properties were investigated using an MR-10 four-ball tester and a DHR-2 rotational rheometer,respectively.The results show that the addition of few-layer graphene can effectively improve the anti-wear and friction reducing properties of lithium-based greases,and the best effect is achieved when the mass fraction of few-layer graphene is 0.1%.The addition of few-layer graphene significantly increases the strain value corresponding to the flow point of the lubricating grease,the energy required to break the lubricating grease soap fibers,and the time needed for soap fiber structure recovery after damage.By regression analysis of the experimental data,the flow equations of lithium-based grease with different mass fraction of few-layer graphene were established based on the Herschel-Bulkley model.

关 键 词：少层石墨烯 锂基润滑脂 摩擦学性能 流变性能 纳米材料 

分 类 号：TH117.2[机械工程—机械设计及理论]