Issue 64, 2017, Issue in Progress

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

Abstract

Oil fly ash has been reported to be a good source for the production of carbon nanotubes (CNTs). Recently, these CNTs were evaluated as lubricant additives in sunflower base oil and were found to exhibit excellent tribological properties. In this work, these CNTs were tested as lubricant additives in 100SN, 500SN and 150BS Saudi Aramco base oils. The results on other commercial carbon nanostructures like multiwall and single wall CNTs and graphene are also included in this study for comparison. Excellent tribological performance was obtained with CNTs of fly ash at a very small concentration. The observed reduction in values of the friction coefficient between two metallic surfaces using these CNTs was found to be superior to those of other carbon nanomaterials. The value of the friction coefficient was reduced by around 20% at a concentration of 0.1 wt%. These values were also investigated as a function of load, speed and temperature. The rheological behaviour showed that the viscosity of the 0.1 wt% CNTs-impregnated 500SN oil is almost invariant compared to that of the pure one. It is therefore suggested that CNTs of fly ash may be a good lubricant additive to minimize the friction and improve the fuel economy.

Graphical abstract: Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

Article information

Article type
Paper
Submitted
28 Jun 2017
Accepted
11 Aug 2017
First published
17 Aug 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 40295-40302

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

N. Salah, M. Sh. Abdel-wahab, A. Alshahrie, N. D. Alharbi and Z. H. Khan, RSC Adv., 2017, 7, 40295 DOI: 10.1039/C7RA07155H

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements