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HERO ID
6949510
Reference Type
Journal Article
Title
Synergic effect of SDBS and GA to prepare stable dispersion of CNT in water for industrial heat transfer applications
Author(s)
Babita; Sharma, SK; Gupta, SM; ,
Year
2018
Is Peer Reviewed?
1
Journal
Materials Research Express
EISSN:
2053-1591
Publisher
IOP PUBLISHING LTD
Location
BRISTOL
DOI
10.1088/2053-1591/aac579
Web of Science Id
WOS:000433567400001
Abstract
Dispersion of hydrophobic carbon nanotubes in water is challenging. Herein, efforts have been made to study the dispersive effect of surface active agents on multi-walled carbon nanotubes (MWCNT). A method was developed to prepare a stable dispersion of MWCNT using sodium dodecyl benzene sulfonate (SDBS) and gum arabic (GA). Effect of ultrasonication time and surfactant concentration was also investigated. Compared to pure SDBS and GA based dispersion, their mixture was found to be effective to obtain a better dispersion of MWCNT, reflecting a synergistic effect of this mixture due to electrostatic and steric hindrance mechanism of surfactants. Rheology of CNT nanofluids showed the Newtonian behavior as viscosity was independent of shear rate. The viscosity of CNT nanofluids was higher than that of water. The thermal conductivity of dispersion was much higher than that of base fluid. This study provides the bases for using mixed surfactant system to disperse MWCNT in the polar base fluid to prepare nanofluids having enhanced thermal conductivity which can be used for heat transfer applications.
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