Effects of TiO2 nanoparticles and oleic acid surfactant on the rheological behavior of engine lubricant oil

In this work, we have studied the effect of titanium (lV) oxide (TiO2) nanoparticles dispersed in an engine lubricant oil on its rheological behavior. In order to prepare this nanofluid, mechanical stirrer and ultrasonic bath were used. The nanoparticles were characterized using SEM, TEM and dynamic...

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Bibliographic Details
Published inJournal of molecular liquids Vol. 268; pp. 925 - 930
Main Authors Ghasemi, Rezvan, Fazlali, Alireza, Mohammadi, Amir H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2018
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Summary:In this work, we have studied the effect of titanium (lV) oxide (TiO2) nanoparticles dispersed in an engine lubricant oil on its rheological behavior. In order to prepare this nanofluid, mechanical stirrer and ultrasonic bath were used. The nanoparticles were characterized using SEM, TEM and dynamic light scanning. The rheological behavior of the system was studied by a parallel plate rheometer. Then, oleic acid, as surfactant, was used to stabilize suspensions. Also, the effect of the surfactant on the rheological behavior was studied. Three different models for rheological behavior, namely Power law, Cross and Carreau models, were considered. The Carreau model provides the best prediction of the rheological behavior for this system. •The effect of TiO2 nanoparticles on the rheological behavior of an engine lubricant oil is investigated.•The nanoparticles were characterized using SEM, TEM and dynamic light scanning techniques.•The rheological behavior of the system was studied by a parallel plate rheometer.•Oleic acid, as surfactant, was used to stabilize suspensions and its effect on the rheological behavior was studied.•The Carreau model provides the best prediction of the rheological behavior for the studied system.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2018.07.002