润滑油
纳米片
材料科学
表面改性
分散稳定性
纳米材料
色散(光学)
摩擦学
干润滑剂
化学工程
分子
基础油
纳米技术
复合材料
纳米颗粒
有机化学
工程类
化学
物理
光学
扫描电子显微镜
作者
Jingde Gao,Chunyu Du,Tingting Zhang,Xiaozhi Zhang,Yingyi Qian,Shujuan Liu,Weimin Liu
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2021-09-24
卷期号:4 (10): 11080-11087
被引量:48
标识
DOI:10.1021/acsanm.1c02556
摘要
Surface modification can be used as an effective tool for designing functionalized 2D nanomaterial-based lubricant additives with desirable properties. In this paper, Ti3C2Tx-based nanoadditives are prepared via surface modification with a tannic acid (TA)–Fe3+ complex and then by introducing commercial lubricating additive dialkyl dithiophosphate (DDP) via Michael addition. TA and FeCl3 solutions are used to form a TA–metal complex as the adhesion layer to anchor Ti3C2Tx nanosheets and then modification with a commercial lubricating additive DDP molecule via Michael addition, resulting in the formation of DDP-functionalized MXene nanosheets (DDP-Ti3C2Tx). The experimental results show that the dispersive stability of the as-prepared DDP-Ti3C2Tx in 500SN base oil is greatly improved for more than 1 week. Furthermore, the tribological properties of the DDP-Ti3C2Tx nanosheet additive are evaluated. The results show that the as-prepared DDP-Ti3C2Tx exhibits significant anti-wear and friction reduction abilities with a low coefficient of friction not exceeding 0.11, reduction in the corresponding wear volume by about 87%, and a high load-carrying capacity up to 500 N as a lubricating additive. The tribological properties may be attributable to the good dispersion and the shape of the small sheet, which ensure their entry into the contact area of the friction pair and the formation of a continuous chemical protective film that prevents direct contact and seizure.
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