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M. N. Popova¹, ¹, N. V. Usol'tseva¹, A. I. Smirnova¹, V. S. Bogdanov²

Author affiliations
¹Nanomaterials Research Institute, Ivanovo State University,
Ermak st., 39, 153025 Ivanovo, Russia. 
E-mail: nv_usoltseva@mail.ru
²Ivanovo State Agricultural Academy named after academician D. K. Belyaev
Sovietskaya str., 45, 153012 Ivanovo, Russia

Abstract
Rheological and tribological testing of binary and ternary systems containing industrial oil I-20A with various additives was conducted. Analysis of tribological tests indicates that the cholesteric liquid crystals X-7 and X-20 with microaddition of CNT added to I-20A have good antifriction quality while X-7 and X-20 are effective anti-wear additives. Introduction of cholesteryl ester of stearic acid (X-7) additive to the industrial oil I-20A, with different values of concentration, contributes to a significant increase in the levels of wear resistance of friction pairs. Rheological tests showed that introduction of nanotubes leads to a change in the ratio between the elastic and viscous components in favor of increasing of elastic properties of the sample that leads to a deterioration in tribological performance of the oil I-20A.

Keywords: tribological properties, additives, friction coefficient, wear spot area, cholesteric liquid crystals