Page 101 - 《摩擦学学报》2021年第5期

第 41 卷 第 5 期 摩 擦 学 学 报 Vol 41 No 5
2021 年 9 月 Tribology Sept, 2021

DOI: 10.16078/j.tribology.2020200

水基MWCNTs/MoS 复合纳米流体的摩擦学
2
性能研究

*
彭锐涛 , 童佳威, 赵林峰, 彭 兴, 贺湘波, 陈美良
(湘潭大学 机械工程学院, 湖南 湘潭 411100)

摘 要: 使用离子液体[EMIm]BF 4 分散多壁碳纳米管(MWCNTs)，再以[EMIm]BF 4 -阿拉伯树胶(GA)为添加剂分散二
硫化钼(MoS 2 )，二者的水溶液复配得到复合纳米流体. 采用拉曼光谱分析了MWCNTs的改性度，通过吸光度和粒度
对复合纳米流体的分散与悬浮稳定性进行了表征. 对不同纳米颗粒配比的复合纳米流体润湿性能和摩擦学性能进
行测试，结果表明：MWCNTs和MoS 2 质量分数为0.6%、1.2%时复合纳米流体的铺展成膜能力最好，其接触角约为
63.04°，相比于去离子水降低了23.55%. 摩擦磨损测试结果也表明此配比下的减摩抗磨性能最佳，平均摩擦系数为
0.073，比去离子水降低了61.98%，同时体积磨损率降低了67.87%. 磨痕形貌观测表明，最优配比下磨痕浅，且表面
光滑、无犁沟. X射线光电子能谱(XPS)表明MWCNTs和MoS 2 共同参与摩擦并在基底成膜，由此协同实现了高效
润滑.
关键词: 碳纳米管; 二硫化钼; 离子液体; 纳米流体; 摩擦磨损
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2021)05–0690–10

Preparation and Tribological Properties of Water-Based
CNTs/MoS Composite Nanofluid
2

*
PENG Ruitao , TONG Jiawei, ZHAO Linfeng, PENG Xing, HE Xiangbo, CHEN Meiliang

(School of Mechanical Engineering, Xiangtan University, Hunan Xiangtan 411100, China)
Abstract: The ionic liquid [EMIm]BF 4 was used to disperse multi-walled carbon nanotubes (MWCNTs), and
[EMIm]BF 4 -Gum Arabic (GA) was used as an additive to disperse molybdenum disulfide (MoS 2 ). The two aqueous
solutions were mixed to obtain a composite nanofluid. Raman spectroscopy was used to analyze the degree of
modification of MWCNTs, and the dispersion and suspension stability of the composite nanofluid were characterized by
absorbance and particle size. The wetting and tribological properties of the composite nanofluids with different
nanoparticle ratios were measured. The results showed that for the mass fractions of MWCNTs of 0.6% and MoS 2 of
1.2%, the fluid had the best spreading and film forming ability. Its contact angle was about 63.04°, which was 23.55%
lower than deionized water. In addition, the anti-wear performance was the best. In specific the average friction
coefficient was 0.073, which was 61.98% lower than deionized water, and the volume wear rate was reduced by 67.87%.
The wear scar was shallow and the surface was smooth without furrows. X-ray photoelectron spectroscopy showed that
MWCNTs and MoS 2 engaged in friction and produced a film on the substrate, thereby synergistically achieving high-
efficiency lubrication.
Key words: multi-walled carbon nanotube; molybdenum disulfide; ionic liquid; nanofluid; tribology

Received 15 September 2020, revised 27 October 2020, accepted 7 December 2020, available online 28 September 2021.
*Corresponding author. E-mail: pengruitao@xtu.edu.cn, Tel: +86-731-58292910.
The project was supported by the National Natural Science Foundation of China (51975504), Education Department of Hunan
Province (19B539) and the Natural Science Foundation of Hunan Province (2021JJ30676).
国家自然科学基金项目(51975504)，湖南省教育厅科学研究项目(19B539)和湖南省自然科学基金项目(2021JJ30676)资助.