, Volume 6, Issue 2, pp 208–218 | Cite as

Tribological evaluation of environmentally friendly ionic liquids derived from renewable biomaterials

  • Cheng Jiang
  • Weimin Li
  • Jingyan Nian
  • Wenjing LouEmail author
  • Xiaobo Wang
Open Access
Research Article


Unlike most of the conventional ionic liquids (ILs) derived from non-renewable resources, five environmentally friendly ILs ([Ch][AA] ILs) derived from amino acids (AAs) and choline (Ch) were synthesized using biomaterials by a simple, green route: acid–base reaction of Ch and AAs. The thermal and corrosion properties, as well as viscosity, of the prepared ILs were examined. The results revealed that the anion structure of ILs plays a dominant role in their thermal and viscosity behavior. These ILs exhibited less corrosion toward copper, related to their halogen-, sulfur-, and phosphorus-free characteristics. The tribological behavior of the synthesized ILs was examined using a Schwingungs Reibung und Verschleiss tester, and the results indicated that these ILs exhibit good friction-reducing and anti-wear properties as lubricants for steel/steel contact. Results from energy-dispersive spectroscopy and X-ray photoelectron spectroscopy indicated that the good tribological properties of [Ch][AA] ILs are related to the formation of a physically adsorbed film on the metal surface during friction.


choline amino acids ionic liquids lubricant tribological behavior environmentally friendly 



The authors are grateful to National Natural Science Foundation of China (Grant Nos. 51605471 and 51505460) and National 973 program (No. 2013CB632301) for financial support.


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Copyright information

© The author(s) 2018

Authors and Affiliations

  • Cheng Jiang
    • 1
    • 2
  • Weimin Li
    • 1
    • 2
  • Jingyan Nian
    • 1
  • Wenjing Lou
    • 1
    • 2
    Email author
  • Xiaobo Wang
    • 1
    • 2
  1. 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouChina
  2. 2.Qingdao Center of Resource Chemistry & New MaterialsQingdaoChina

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