高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (7): 1411-1417.doi: 10.7503/cjcu20180819

• 有机化学 • 上一篇    下一篇

异辛基乙二胺-CF3SO3型质子化离子液体作为液体石蜡添加剂的摩擦学性能

李晨光1, 花儿1,2(), 刘天霞1,2()   

  1. 1. 北方民族大学化学与化学工程学院, 银川 750021
    2. 国家民委化工技术基础重点实验室, 银川 750021
  • 收稿日期:2018-12-06 出版日期:2019-07-10 发布日期:2019-07-12
  • 作者简介:花 儿, 女, 博士, 副教授, 主要从事离子液体合成及理论计算方面的研究. E-mail: huaer0101@hotmail.com; 刘天霞, 女, 博士, 副教授, 主要从事发动机烟炱分散及磨损方面的研究. E-mail: liutianxia666@126.com
  • 基金资助:
    宁夏回族自治区留学归国人员创新创业团队项目(批准号: 宁人社函[2018]711号)资助.

Tribological Behaviour of Protic Ionic Liquid Composed of 2-Ethylhexylethylenediaminium Cation and Trifluoromethanesulfonate Anion as Liquid Paraffin Additive

LI Chenguang1, HUA Er1,2,*(), LIU Tianxia1,2,*()   

  1. 1. College of Chemistry and Chemical Engineering, Yinchuan 750021, China
    2. Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission,North Minzu University, Yinchuan 750021, China
  • Received:2018-12-06 Online:2019-07-10 Published:2019-07-12
  • Contact: HUA Er,LIU Tianxia E-mail:huaer0101@hotmail.com;liutianxia666@126.com
  • Supported by:
    † Supported by the Ningxia Innovation and Entrepreneurship Team Funds for Graduates Returned from Abroad, China(No.NHRSS[2018] 711).

摘要:

以异辛基乙二胺-CF3SO3[HEtHex(TFS)]型质子化离子液体作为钢/钢摩擦副的润滑油添加剂, 考察了不同HEtHex(TFS)含量的液体石蜡(LP)在不同温度和载荷下的摩擦学性能. 通过扫描电子显微镜和X射线能谱仪对钢球表面磨斑的形貌及所含元素进行了分析与表征. 结果表明, 加入HEtHex(TFS)添加剂可明显增大LP的最大无卡咬负荷(PB)值, 改善LP的减摩抗磨性能. HEtHex(TFS)在LP中添加的最佳质量分数为0.75%, 在25 ℃, 294 N时其减摩效果最好; 在25 ℃, 196 N时其抗磨效果最佳. 元素分析结果表明, 加入HEtHex(TFS)添加剂后在钢球表面形成了一层摩擦保护膜, 从而起到了减摩抗磨的作用.

关键词: 质子化离子液体, 润滑油添加剂, 液体石蜡, 摩擦学性能, 表面分析

Abstract:

Tribological behavior of HEtHex(TFS) as additive in liquid paraffin(LP, simulant of lubricating base oils) with different mass fractions for the contact of steel/steel ball was investigated. At the same time, the effects of the temperature and load on the anti-friction and anti-wear properties were studied. The morpho-logies and the elemental compositions of the worn surfaces were analyzed using scanning electron microscope(SEM) and X-ray energy spectroscopy(EDS). The results showed that the value of extreme-pressure increased significantly, and the antifriction and anti-wear properties of the LP improved with the addition of HEtHex-(TFS). The optimum value of HEtHex(TFS) as additive in the LP was 0.75%(mass fraction). The best abilities for the anti-friction and anti-wear property of 0.75% HEtHex(TFS) in the LP were found at 25 ℃, 294 and 196 N, respectively. The results of the elemental analysis showed that a protective boundary film was formed on the steel ball surface and it caused that the anti-friction and anti-wear properties was improved.

Key words: Protic ionic liquid, Lubricant additive, Liquid paraffin, Tribological property, Surface analysis

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