Sun Xinghui, Zhao Min, Han Bai, Kang Hongjun, Fan Zhimin, Liu Yuyan, Umar Ahmad, Guo Zhanhu
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
HIT-LIHON United Research and Development Center, Harbin, 150001, P. R. China.
J Nanosci Nanotechnol. 2018 May 1;18(5):3427-3432. doi: 10.1166/jnn.2018.14694.
In this work, partially exfoliated multi-walled carbon nanotubes (Px-CNTs) were prepared by oxidizing multi-walled carbon nanotubes (MWCNTs) and applied into water-based lubricant as a kind of new additives, resulting in an outstanding anti-friction effect. The Px-CNTs have the structures of both MWCNTs and graphene oxide nanoribbons (GONRs). The special structure could prevent aggregation in water-based lubricant and reduce friction effectively. At the same time, Px-CNTs generate both sliding and rolling friction like MWCNTs and GONRs simultaneously. The friction force of Px-CNTs tended to go up after declining with increasing its loading, suggesting the existence of optimum additive amount of additions. Compared with water, water with 0.5 wt% Px-CNTs further reduced the friction force up to 66.4%. Compared with CNTs-COOH and GONRs dispersed in water via a similar method, Px-CNTs in water displays remarkable friction characteristic, suggesting that the friction force of water with 0.5 wt% Px-CNTs is decreased by 19.82% and 13.82% compared with water with 0.3 wt% MWCNTs and GONRs.
在本工作中，通过氧化多壁碳纳米管（MWCNTs）制备了部分剥离的多壁碳纳米管（Px-CNTs），并将其作为一种新型添加剂应用于水基润滑剂中，产生了优异的减摩效果。Px-CNTs具有MWCNTs和氧化石墨烯纳米带（GONRs）的结构。这种特殊结构可防止其在水基润滑剂中聚集并有效降低摩擦。同时，Px-CNTs像MWCNTs和GONRs一样同时产生滑动摩擦和滚动摩擦。随着Px-CNTs添加量的增加，其摩擦力先下降后上升，表明添加剂存在最佳添加量。与水相比，含有0.5 wt% Px-CNTs的水可将摩擦力进一步降低达66.4%。与通过类似方法分散在水中的CNTs-COOH和GONRs相比，水中的Px-CNTs表现出显著的摩擦特性，表明含有0.5 wt% Px-CNTs的水的摩擦力与含有0.3 wt% MWCNTs和GONRs的水相比分别降低了19.82%和13.82%。
