THERMAL SCIENCE

International Scientific Journal

Kin Yuen Leong

,

Nurfadhillah Mohd Hanafi

,

Risby Mohd Sohaimi

,

Noor Hafizah Amer

THE EFFECT OF SURFACTANT ON STABILITY AND THERMAL CONDUCTIVITY OF CARBON NANOTUBE BASED NANOFLUIDS

ABSTRACT
The addition of highly conductive substance such as carbon nanotubes into a traditional heat transfer fluid will enhance the fluids’ thermal conductivity. However, dispersion process of carbon nanotubes into base fluids is not an easy task due to hydrophobic characteristic of its surface. This study attempts to investigate the stability and thermal conductivity of carbon nanotube based ethylene glycol/water nanofluids with and without surfactants. Stability investigation was conducted through observation and zeta potential measurement methods. As for the thermal conductivity, the samples were measured based on transient line heat source. The results showed that 0.01 wt.% of carbon nanotube based nanofluid, containing 0.01wt.% hexadecyltrimethylammonium bromide possess highest zeta potential value compared to the other tested samples. 0.5 wt. % of carbon nanotube based nanofluids with gum arabic exhibit 25.7% thermal conductivity enhancement.
KEYWORDS
nanofluids, carbon nanotubes, ethylene glycol, water, surfactants, thermal conductivity
PAPER SUBMITTED: 2013-09-14
PAPER REVISED: 2014-05-13
PAPER ACCEPTED: 2014-05-27
PUBLISHED ONLINE: 2014-07-06
DOI REFERENCE: https://doi.org/10.2298/TSCI130914078L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 2, PAGES [429 - 436]
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The effect of surfactant on stability and thermal conductivity of carbon nanotube based nanofluids

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence