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Influence of confinement on flow and lubrication properties of a salt model ionic liquid investigated with molecular dynamics

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Abstract.

We present a molecular dynamics study of the effects of confinement on the lubrication and flow properties of ionic liquids. We use a coarse-grained salt model description of ionic liquid as a lubricant confined between finite solid plates and subjected to two dynamic regimes: shear and cyclic loading. The impact of confinement on the ion arrangement and mechanical response of the system has been studied in detail and compared to static and bulk properties. The results have revealed that the wall slip has a profound influence on the force built-up as a response to mechanical deformation and that at the same time in the dynamic regime interaction with the walls represents a principal driving force governing the behaviour of ionic liquid in the gap. We also observe a transition from a dense liquid to an ordered and potentially solidified state of the ionic liquid taking place under variable normal loads and under shear.

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Authors and Affiliations

  1. Scientific Computing Laboratory, Center for the Study of Complex Systems, Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia

    Miljan Dašić & Igor Stanković

  2. Advanced Technology Division, Toyota Motor Europe NV/SA, Technical Center, Hoge Wei 33B, 1930, Zaventem, Belgium

    Konstantinos Gkagkas

Authors
  1. Miljan Dašić
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  2. Igor Stanković
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  3. Konstantinos Gkagkas
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Correspondence to Miljan Dašić.

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Dašić, M., Stanković, I. & Gkagkas, K. Influence of confinement on flow and lubrication properties of a salt model ionic liquid investigated with molecular dynamics. Eur. Phys. J. E 41, 130 (2018). https://doi.org/10.1140/epje/i2018-11740-6

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  • DOI: https://doi.org/10.1140/epje/i2018-11740-6

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