Abstract
This article reports a novel way of in situ formation of ionic liquids (ILs) that are used as lubricant additives for steel/steel contacts. The ILs can be generated simply in base oils by mixing small molecules of 2-oxazolidinone, triglyme, or tetraglyme with lithium bis(trifluoromethane sulfonyl) imide in appropriate molar ratios at room temperature. The said ILs can be formed in polyether, polyester, and polyurea grease and show better solubility in these base oils than commonly used ILs such as 1-methyl-3-hexylimidazolium hexafluorophosphate (L-P106). They can significantly improve the friction-reducing and antiwear properties of the base oils.
Similar content being viewed by others
References
Laszlo, J.A., Compton, D.L.: α-Chymotrypsin catalysis in imidazolium-based ionic liquids. Biotechnol. Bioeng. 75, 181–186 (2001)
Bose, S., Wijeratne, A.B., Thite, A., Kraus, G.A., Armstrong, D.W., Petrich, J.W.: Influence of chiral ionic liquids on stereoselective fluorescence quenching by photoinduced electron transfer in a naproxen dyad. J. Phys. Chem. B 113, 10825–10829 (2009)
Earle, M.J., Seddon, K.R.: Ionic liquid: green solvents for the future. Pure Appl. Chem. 72, 1391–1398 (2000)
Welton, T.: Room-temperature ionic liquids: solvents for synthesis and catalysis. Chem. Rev. 99, 2071–2083 (1999)
Hagiwara, R., Ito, Y.: Room temperature ionic liquids of alkylimidazolium cations and fluoroanions. J. Fluorine Chem. 105, 221–227 (2000)
Seddon, K.R.: Ionic liquids for clean technology. J. Chem. Tech. Biotechnol. 68, 351–356 (1997)
Zhao, H.: Innovative applications of ionic liquids as ‘‘green” engineering liquids. Chem. Eng. Commun. 193, 1660–1677 (2006)
Qu, J., Blau, P.J., Dai, S., Luo, H., Meyer, H.M., Truhan, J.J.: Tribological characteristics of aluminum alloys sliding against steel lubricated by ammonium and imidazolium ionic liquids. Wear 267, 1226–1231 (2009)
Ye, C.F., Liu, W.M., Chen, Y.X.G., Yu, L.: Room-temperature ionic liquids: a novel versatile lubricant. Chem. Commun. 21, 2244–2245 (2001)
Liu, W., Ye, C., Chen, Y., Ou, Z., Sun, D.C.: Tribological behavior of sialon ceramics sliding against steel lubricated by fluorine-containing oils. Tribol. Int. 35, 503–509 (2002)
Mu, Z.G., Zhou, F., Zhang, S.X., Liang, Y.M., Liu, W.M.: Effect of the functional groups in ionic liquid molecules on the friction and wear behavior of aluminum alloy in lubricated aluminum-on-steel contact. Tribol. Int. 38, 725–731 (2005)
Jiménez, A.E., Bermúdez, M.D., Iglesias, P., Carrión, F.J., Martínez-Nicolás, G.: 1-N-Alkyl-3-methylimidazolium ionic liquids as neat lubricants and lubricant additives in steel–aluminium contacts. Wear 260, 766–782 (2006)
Phillips, B.S., Zabinski, J.S.: Ionic liquid lubrication effects on ceramics in a water environment. Tribol. Lett. 17, 533–541 (2004)
Liu, W.M., Ye, C.F., Gong, Q.Y., Wang, H.Z., Wang, P.: Tribological performance of room-temperature ionic liquids as lubricant. Tribol. Lett. 13, 81–85 (2002)
Zhang, C., Malhotra, S.V., Francis, A.J.: Toxicity of imidazolium- and pyridinium-based ionic liquids and the co-metabolic degradation of N-ethylpyridinium tetrafluoroborate. Chemosphere 82, 1690–1695 (2011)
Fernandes, A.M., Rocha, M.A.A., Freire, M.G., Marrucho, I.M., Coutinho, J.A.P., Santos, L.M.N.B.: F.: evaluation of cation-anion interaction strength in ionic liquids. J. Phys. Chem. B 115, 4033–4041 (2011)
Yu, F.L., Zhang, R.L., Xie, C.X., Yu, S.T.: Synthesis of thermoregulated phase-separable triazolium ionic liquids catalysts and application for Stetter reaction. Tetrahedron 66, 9145–9150 (2010)
Jiménez, A.E., Bermúdez, M.D.: Imidazoliumionic liquids as additives of the synthetic ester propylene glycol dioleate in aluminium–steel lubrication. Wear 265, 787–798 (2008)
Hu, Y.S., Li, H., Huang, X.J., Chen, L.Q.: Novel room temperature molten salt electrolyte based on LiTFSI and acetamide for lithium batteries. Electrochem. Commun. 6, 28–32 (2004)
Gorecki, W., Roux, C., Clémancey, M., Armand, M., Belorizky, E.: NMR and conductivity study of polymer electrolytes in the imide family: P(EO)/Li[N(SO2CnF2n+1)(SO2CmF2m+1)]. ChemPhysChem 3, 620–625 (2002)
Aihara, Y., Kuratomi, J., Bando, T., Iguchi, T., Yoshida, H., Ono, T., Kuwana, K.: Investigation on solvent-free solid polymer electrolytes for advanced lithium batteries and their performance. J. Power Source 114, 96–104 (2003)
Chen, R.J., Wu, F., Li, L., Qiu, X.P., Chen, L.Q., Chen, S.: The structure–activity relationship studies of binary room temperature complex electrolytes based on LiTFSI and organic compounds with acylamino group. Vib. Spectrosc. 44, 297–307 (2007)
Henderson, W.A.: Glyme–lithium salt phase behavior. J. Phys. Chem. B 110, 13177–13183 (2006)
Chen, R.J., Wu, F., Li, L., Xu, B., Qiu, X.P., Chen, S.: Novel binary room-temperature complex system based on LiTFSI and 2-oxazolidinone and its characterization as electrolyte. J. Phys. Chem. C 111, 5184–5194 (2007)
Tamura, T., Yoshida, K., Hachida, T., Tsuchiya, M., Nakamura, M., Kazue, Y., Tachikawa, N., Dokko, K., Watanabe, M.: Physicochemical properties of glyme–Li salt complexes as a new family of room-temperature ionic liquids. Chem. Lett. 39, 753–755 (2010)
Yoshida, K., Nakamura, M., Kazue, Y., Tachikawa, N., Tsuzuki, S., Seki, S., Dokko, K., Watanabe, M.: Oxidative-stability enhancement and charge transport mechanism in glyme–lithium salt equimolar complexes. J. Am. Chem. Soc. 133, 13121–13129 (2011)
Borisenko, L.I., Ishchuk, YuL: Properties of polyurea greases on a synthetic base. Chem. Technol. Fuels Oils 40, 415–417 (2004)
NIST Standard Reference Database 20, Version 3.5. http://srdata.nist.gov/xps/. Accessed 16 July 2012
Wang, H.Z., Lu, Q.M., Ye, C.F., Liu, W.M., Cui, Z.J.: Friction and wear behaviors of ionic liquid of alkylimidazolium hexafluorophosphates as lubricants for steel/steel contact. Wear 256, 44–48 (2004)
Hernández Battez, A., González, R., Viesca, J.L., Blanco, D., Asedegbega, E., Osorio, A.: Tribological behaviour of two imidazolium ionic liquids as lubricant additives for steel/steel contacts. Wear 266, 1224–1228 (2009)
Minami, I.: Ionic liquids in tribology. Molecules 14, 2286–2305 (2009)
Suzuki, A., Shinka, Y., Masuko, M.: Tribological characteristics of imidazolium-based room temperature ionic liquids under high vacuum. Tribol. Lett. 27, 307–313 (2007)
Acknowledgments
The authors acknowledge the support for this study from the NSFC (Nos. 51105353, 51105354, and 21173243) and from the ‘Hundreds Talents’ Program of the CAS.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Song, Z., Fan, M., Liang, Y. et al. Lithium-Based Ionic Liquids: In Situ-Formed Lubricant Additive Only by Blending. Tribol Lett 49, 127–133 (2013). https://doi.org/10.1007/s11249-012-0046-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11249-012-0046-1