Tribological properties of paraffin oil doped with liquid crystalline mezogenes

• Autorzy: Ważyńska, B. , Okowiak, J. , Kołacz, S. , Małysa, A.
• Konferencja: Thw 17th Conference on Liquid Crystals : Chemistry Physics and Applications ; (17 ; 09.2007 ; Augustów, Poland)
• Języki publikacji: EN

Abstrakty

EN

The paper presents description and analysis of the results obtained in the investigation performed on a disc-ball tribotester T-11. Samples of 100Cr6 steel were tested, while as lubricant the mixtures of paraffin oil, with addition of 0.5%, 1%, and 2% of liquid crystalline compounds, from two homologous series defined with nOBCAB and nCBB symbols, were used. The friction force and wear of a sample and a counter-sample were measured. The improvement in tribological and anti-wear properties was found for all mixtures in relation to paraffin oil. The best tribological properties and the best wearability were obtained for mixtures with a compound 8CBB. This compound differs from the others in formation of different liquid crystalline phases.

Słowa kluczowe

EN

thermotropic liquid crystals; lubricants; tribological characteristic; friction; wear

• Czasopismo: Opto-Electronics Review
• Rocznik: 2008
• Tom: Vol. 16, No. 3
• Strony: 267-270
• Opis fizyczny: Bibliogr. 5 poz., il., wykr.

Twórcy

autor

Ważyńska, B.

autor

Okowiak, J.

autor

Kołacz, S.

autor

Małysa, A.

• Faculty of Materials Science and Footwear Technology, Radom Technical University, 27 Chrobrego Str., 26-600 Radom, Poland,

Bibliografia

• 1. J. Yao, Q. Wang, Z. Xu, J. Yin, and S. Wen, “Tribological performance of nematic liquid crystal 5CBB as lubricant additive”, Lubr. Eng. 56, 21-25 (2000).
• 2. M.D. Bermudez, G. Martinez-Nicolas, and F.J. Carrion-Vilches, “Tribological properties of liquid crystals as lubricant additives”, Wear 212, 188-194 (1997).
• 3. M.W. Sułek and T. Wasilewski, “Influence of concentration on lubricity ethoxylated sorbitant esters agueous solution”, Int. J. Appl. Mech. Eng. 7, 188-195 (2002).
• 4. B. Ważyńska and J. Okowiak, “Tribological properties of different kinds of thermotropic liquid crystals as lubricants”, Tribol. Lett. 24, 1-5 (2006).
• 5. B. Ważyńska and J. Okowiak, “Influence of chemical structure on tribological properties of nematic mixtures as lubricants”, Proc. 16th Conf. on Liquid Crystals, pp. 285-289, edited by P. Perkowski, Z. Raszewski and J. Zieliński, RW WAT, Warsaw, 2007.