Tribological properties of paraffin oil doped with liquid crystalline mezogenes

The paper presents description and analysis of the results obtained in the investigation performed on a disc-ball tribotester T-11. Samples of 10006 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 information of different liquid crystalline phases.