Lin Zhang

Chinese Academy of Sciences, Peping, Beijing, China

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Publications (3)5.34 Total impact

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    ABSTRACT: Three kinds of phosphonate ionic liquids (PILs), 1-butyl-3-methylimidazolium O-butyl phosphonate (BMIM-BP), 1-butylpyridinium O-butyl phosphonate (BPy-BP) and N, N-dibutylammonium O-butyl phosphonate (TBA-BP) were synthesized and evaluated as lubricants for steel/aluminum contact. Results show PILs perform much better lubricating properties than conventional ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate and liquid paraffin, although the wear volume of BMIM-BP is larger than that of liquid paraffin. The results of corrosion tests of the PILs demonstrate that the lubricating properties of PILs are relevant with their electrochemical properties. Moreover, the tribological mechanism was discussed by surface characterizations and contrastive experiment. It is concluded that the tribological performances of the PILs are related to the formation of the ordered adsorption films, tribochemical reactions and their corrosion properties.
    Tribology International 04/2015; 84. · 2.17 Impact Factor
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    ABSTRACT: Several imidazole phosphate ionic liquids with varying carbon chain length have been synthesized at room temperature. Corrosion characteristics and tribological properties of these synthesized ionic liquids were studied using four-ball friction and wear testing machine. Its lubrication mechanism was also investigated by means of electron microscopy and X-ray photoelectron spectroscopy. The experimental results showed that no corrosion was generated when the imidazole phosphate ionic liquid was applied to steel-steel pair. Meanwhile, the imidazole phosphate showed excellent anti-wear and lubricating performances, its frictional performance was related to the polarity of ionic liquids. It is suggested that the ionic liquids react with friction surface to form a protective film of iron phosphate and result in reduction in friction and wear.
    Science in China Series E Technological Sciences 01/2009; 52(5):1191-1194. · 1.02 Impact Factor
  • Lin Zhang, Dapeng Feng, Bin Xu
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    ABSTRACT: Tribological properties of three novel phosphates-based ionic liquids (ILs), i.e., 1,3-diethyl imidazolium diethylphosphate, 1-ethyl-3-butyl imidazolium diethylphosphate, and 1-ethyl-3-octyl imidazolium diethylphosphate, were evaluated as lubricants for the steel–steel sliding pair by using an Optimol-SRV oscillating friction and wear tester. The chemical compositions of the boundary films generated on steel contact surfaces were analyzed with the use of a scanning electron microscope (SEM) with a Kevex energy dispersive X-ray analyzer attachment (EDS), and an X-ray photoelectron spectrometer (XPS). The results showed that these phosphate functional group-containing ionic liquids exhibit excellent tribological performance especially at a moderate temperature. The imidazole phosphate ionic liquid has no corrosion to steel. The mechanism for the friction-reduction and anti-wear effect of ionic liquids has also been proposed and discussed from the tribochemistry point of view.
    Tribology Letters 34(2):95-101. · 2.15 Impact Factor