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Type: Journal article
Title: Experimental studies on the stability of CuO nanoparticles dispersed in different base fluids: influence of stirring, sonication and surface active agents
Author: Kamalgharibi, M.
Hormozi, F.
Zamzamian, S.
Sarafraz, M.
Citation: Heat and Mass Transfer, 2016; 52(1):55-62
Publisher: Springer
Issue Date: 2016
ISSN: 0947-7411
Statement of
M. Kamalgharibi, F. Hormozi, Seyed Amir Hossein Zamzamian, M.M. Sarafraz
Abstract: The main aim of this work is to investigate the influence of different parameters on the stability of spherical CuO nanoparticles dispersed in water, ethylene glycol and 50:50 water/ethylene glycol binary mixture as different base fluids for heat transfer applications. Nano-fluids were prepared using two-step method at weight concentration of 0.1–0.4 %. Time-settlement experiments were established to examine the stability of nano-fluids. Quality tests were also performed to investigate the morphology, purity and size of nanoparticles. In order to stabilize the nano-fluids, stirring, pH control and sonication were utilized. The criteria for assessing the stability of nano-fluids were zeta potential and time-settlement experiments. Results demonstrated that the ethylene glycol can be the best medium for dispersing the CuO nanoparticle in comparison with water and water/EG binary mixture. The best condition for achieving the most stable nano-fluid was also introduced. Role of sonication time, stirring time and addition of surfactant on the stability of nano-fluids were investigated and briefly discussed.
Rights: © Springer-Verlag Berlin Heidelberg 2015
RMID: 0030038161
DOI: 10.1007/s00231-015-1618-z
Appears in Collections:Mechanical Engineering publications

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