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Green Ionic Liquid Lubricants Prepared from Anti-Inflammatory Drug

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Abstract

1-Alkyl-3-methylimidazolium ibuprofen ionic liquids (ILs, L-Ibu104, L-Ibu106 and L-Ibu108) were synthesized from an anti-inflammatory drug, sodium ibuprofen. The physicochemical and tribological properties of these ILs as neat lubricants for steel/steel and steel/copper contacts were measured. The results of hydrolysis stability evaluation and copper strip corrosion test show that these kinds of ILs are hydrolysis stable and have no corrosion to the metal contacts because of stability of anion. The friction and wear test results exhibit that these ibuprofen ILs have more effective friction-reducing and anti-wear properties than poly-alpha-olefin (PAO40) and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulphonyl)imide (L-F106) at 100 °C. According to the X-ray photoelectron spectrometer analytical results, we speculated that physical adsorption films can easily formed on the metal worn surfaces during the rubbing process because of the high adsorption ability of Ibu− anion, which play an important role in the good lubricating behaviours of ibuprofen ILs.

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Acknowledgments

The authors acknowledge the financial support from the NSFC (51305428, 21125316) and “973” programme (2013CB632301) and West Light Foundation of The Chinese Academy of Sciences.

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    Authors and Affiliations

    1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

      Zenghong Song, Qiangliang Yu, Meirong Cai, Guowei Huang, Dongmei Li, Yongmin Liang, Mingjin Fan & Feng Zhou

    2. University of Chinese Academy of Sciences, Beijing, 100049, China

      Zenghong Song, Qiangliang Yu & Guowei Huang

    3. Henan Normal University, Xinxiang, 453007, China

      Meihuan Yao

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    1. Zenghong Song
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    Correspondence to Dongmei Li, Mingjin Fan or Feng Zhou.

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    Zenghong Song and Qiangliang Yu have contributed equally to this work.

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    Song, Z., Yu, Q., Cai, M. et al. Green Ionic Liquid Lubricants Prepared from Anti-Inflammatory Drug. Tribol Lett 60, 38 (2015). https://doi.org/10.1007/s11249-015-0611-5

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