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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Rus Eng


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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2014, 14 (1), 52—61.

Rheological and Tribological Properties of Industrial Oil with Mesogenic Additives and Carbon Nanotubes

M. N. Popova1,
M. A. Zharova
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. 
2Ivanovo State Agricultural Academy named after academician D. K. Belyaev
Sovietskaya str., 45, 153012 Ivanovo, Russia

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

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