Stable dispersion of nanodiamonds in oil and their tribological properties as lubricant additives
Stable dispersion of nanodiamonds in oil and their tribological properties as lubricant additives
复制标题
DOI：
10.1016/j.apsusc.2016.12.109
复制
发表时间：
2017-09
影响因子：
6.7
通讯作者：
Gyoung-Ja Lee;Jin-Ju Park;Min-Ku Lee;C. Rhee
中科院分区：
文献类型：
--
作者：
Gyoung-Ja Lee;Jin-Ju Park;Min-Ku Lee;C. Rhee
纳米金刚石（ND）是一种创新的添加剂，可满足机械、热、摩擦学和介电性能的要求。在这项研究中，与油酸（OA）的表面改性开发的解聚和延长分散的ND在油中，和ND作为润滑油添加剂对钢基体的摩擦学性能的影响进行了研究。OA使ND表面呈疏水性，并将平均粒径从268.6纳米降低到20.1纳米。与未处理的ND相比，OA处理的ND甚至在超过10天后在油中表现出非常稳定的分散体。从分析的摩擦系数，磨损量，和磨损表面使用球盘磨损试验，它的结论是，0.05重量%的OA处理的ND在油润滑剂中添加提供了优异的摩擦和抗磨性能，摩擦系数降低了23%。
Nanodiamonds (NDs) are innovative additives when a combination of mechanical, thermal, tribological, and dielectric properties are required. In this study, a surface modification with oleic acid (OA) is developed for the deaggregation and prolonged dispersion of NDs in oil, and the effect of the NDs as lubricant additives on the tribological properties of a steel substrate is investigated. The OA renders the ND surface hydrophobic and decreases the average particle size from 268.6 to 20.1 nm. The OA-treated NDs exhibit very stable dispersion in oil even after more than 10 days, compared with the untreated NDs. From the analyses of the friction coefficient, wear loss, and worn surfaces using a ball-on-disk wear test, it is concluded that a 0.05 wt% addition of OA-treated NDs in oil lubricant provides excellent friction and anti-wear properties with the friction coefficient being reduced by 23%.