Abstract
A physical model of the lubricity of cholesteric liquid-crystal nanomaterials has been proposed in accordance with which the transition from single-crystal layers of a cholesteric liquid-crystal nanomaterial to polymolecular structurally sensitive liquid-crystal films, which occurs with varying temperature and is governed by the effect of molecules of cholesteric liquid-crystal compounds contained in the lubricant, as well as the reverse transition, lead to a reversible change in the shear resistance. This change results from the formation of continuous planar-oriented and helically twisted boundary layers in the zone of dynamic contact, which consist of molecules of the cholesteric liquid-crystal nanomaterials. The pitch distance of the helix and, therefore, the thickness of cholesteric liquid-crystal films of these nanomaterials exhibit a structurally sensitive response to changes in the temperature in the friction zone, which varies the dissipation of the energy during friction.
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References
Kolesnikov, V.I., Ermakov, S.F., and Sychev, A.P., Triboinduced adsorption of liquid–crystal nanomaterials under frictional interaction of solids, Dokl. Phys., 2009, no. 6, pp. 269–272.
Persson, B.N.J., Sliding Friction: Physical Principles and Applications, Berlin: Springer-Verlag, 2000.
Ermakov, S.F., Tribologiya zhidkokristallicheskikh nanomaterialov i sistem (Tribology of Liquid–Crystalline Nanomaterials and Systems), Minsk: Belaruskaya Navuka, 2012.
Evdokimov, Yu.M., Zakharov, M.A., and Skuridin, S.G., Nanotechnology based on nucleic acids, Herald Russ. Acad. Sci., 2006, vol. 76, no. 1, pp. 5–11.
Kolesnikov, V.I., Myshkin, N.K., Ermakov, S.F., and Sychev, A.P., Thermoinduced effect of reversible lubricating ability of cholesteric liquid-crystalline nanomaterials in friction of solids, Dokl. Phys. Chem., 2014, vol. 457, pp. 123–126.
Ermakov, S.F., Parkalov, V.P., and Shardin, V.A., An integral countable method of rating small changes in the amplitude of oscillations and its application in pendulum tribometry, J. Frict. Wear, 2003, vol. 24, no. 2, pp. 166–172.
Ermakov, S.F., and Mikyalenis, A.V., RB Patent 5317, Afitsyiny byul., 2009, no. 3.
Sonin, A.S., Vvedenie v fiziku zhidkikh kristallov (Introduction into Liquid Crystal Physics), Moscow: Nauka, 1983.
Belyakov, V.A., Optika kholestericheskikh zhidkikh kristallov (Optics of Cholesteric Liquid Crystals), Moscow: Nauka, 1982.
Kapustin, A.P., Eksperimental’nye issledovaniya zhidkikh kristallov (Experimental Study of Liquid Crystals), Moscow: Nauka, 1978.
Akhmatov, A.S., Molekulyarnaya fizika granichnogo treniya (Molecular Physics of Boundary Friction), Moscow: Fizmatgiz, 1963.
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Original Russian Text © S.F. Ermakov, V.I. Kolesnikov, A.P. Sychev, 2016, published in Trenie i Iznos, 2016, Vol. 37, No. 2, pp. 177–182.
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Ermakov, S.F., Kolesnikov, V.I. & Sychev, A.P. Lubricity of cholesteric liquid-crystal nanomaterials in friction of solids. J. Frict. Wear 37, 136–140 (2016). https://doi.org/10.3103/S1068366616020057
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DOI: https://doi.org/10.3103/S1068366616020057