Page 23 - 《摩擦学学报》2020年第3期

第 40 卷 第 3 期 摩 擦 学 学 报 Vol 40 No 3
2020 年 5 月 Tribology May, 2020

DOI: 10.16078/j.tribology.2019223

MWCNTs复合物纳米流体的摩擦学性能

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关集俱 , 刘德利 , 王 勇 , 冯伯华 , 许雪峰 3
(1. 常熟理工学院机械工程学院 超精密轴承技术研究中心，江苏 常熟 215500;
2. 苏州工业职业技术学院 精密制造工程系，江苏 苏州 215104;
3. 浙江工业大学 特种装备制造与先进加工技术教育部重点实验室，浙江 杭州 310014)
摘 要: 将油性剂油酸(OA)填充进多壁碳纳米管(MWCNTs)的空腔内制备复合物，再以复合物为添加剂制备一种纳
米流体，考察了复合物的质量分数、MWCNTs的酸处理时间以及摩擦测试条件等对纳米流体摩擦学性能的影响，并
分析了复合物的润滑机理. 结果表明：油酸被成功填充到经酸处理的MWCNTs管内，填充率约20%；摩擦过程中，复
合物制备的纳米流体的摩擦系数有不断减小趋势，其减摩效果甚至优于同等含量的油酸乳化液；当复合物的质量分
数为0.1%左右时，纳米流体可获得最佳的减摩、抗磨效果；随着酸化处理时间的增加，复合物制备的纳米流体的减
摩、抗磨性能会有所提高. 摩擦过程中，复合物可释放出油酸并形成润滑膜，MWCNTs则能够在油酸形成的润滑膜
上发挥“微轴承”的作用，从而使复合物获得更加优良的减摩、抗磨效果.
关键词: 碳纳米管; 复合物; 纳米流体; 摩擦磨损; 润滑机理
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2020)03–0289–10

Tribological Properties of Nanofluid Prepared by Composite
of Multi-walled Carbon Nanotube and Oleic Acid

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GUAN JiJu , LIU Deli , WANG Yong , FENG Bohua , XU Xuefeng 3
(1. Research Center for Ultra-precision Bearing of College of Mechanical Engineering, Changshu Institute
of Technology, Jiangsu Changshu 215500, China
2. Precision Manufacturing Engineering Department, Suzhou Vocational Institute of Industrial Technology,
Jiangsu Suzhou 215104, China
3. Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, Ministry of Education
&Zhejiang Province, Zhejiang University of Technology, Zhejiang Hangzhou 310014, China)
Abstract: Multi-walled carbon nanotubes (MWCNTs) were filled with oleic acid (OA) to prepare the composite
additives for use in the nanofluid. The influence of additive concentration, acid treatment time of MWCNTs, the test
conditions on the tribological properties of the nanofluid were investigated, and the lubrication mechanism of the
composite was also studied. The results showed that the OA was successfully filled into the MWCNTs with a filling rate
of about 20%. In the process of friction, the friction coefficient of nanofluid prepared by the composite tended to
decrease gradually, and its final friction reduction effect was even better than that of the oleic acid emulsion under
different loads. The nanofluid could achieve better tribological properties as the concentration of the composite was
about 0.1%. The tribological properties of the nanofluid would be improved with the increase of the acidification time. It
was supposed that the composite could release the OA to form a lubrication layer during the friction process, which

Received 12 November 2019, revised 20 February 2020, accepted 28 February 2020, available online 28 May 2020.
*Corresponding author. E-mail: daweijiju@163.com, Tel: +86-571-88320729.
The project was supported by the Youth fund of National Natural Science Foundation (51805345) and Youth fund of Jiangsu Natural
Science Foundation(BK20170373).
国家自然科学基金青年基金项目(51805345)和江苏省自然科学基金青年基金项目(BK20170373)资助.