Lubricity of cholesteric liquid-crystal nanomaterials in friction of solids


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Resumo

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.

Sobre autores

S. Ermakov

Belyi Metal–Polymer Research Institute

Autor responsável pela correspondência
Email: erm-s@yandex.ru
Belarus, ul. Kirova 32a, Gomel, 246050

V. Kolesnikov

Rostov State Transport University

Email: erm-s@yandex.ru
Rússia, pl. Rostovskogo strelkovogo polka Narodnogo opolcheniya 2, Rostov-on-Don, 344038

A. Sychev

Southern Scientific Center

Email: erm-s@yandex.ru
Rússia, ul. Chekhova 41, Rostov-on-Don, 344000

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