Experimental studies on the stability of CuO nanoparticles dispersed in different base fluids: influence of stirring, sonication and surface active agents

被引：0
作者：
M. Kamalgharibi
F. Hormozi
Seyed Amir Hossein Zamzamian
M. M. Sarafraz
机构：
[1] Semnan University,Faculty of Chemical, Petroleum and Gas Engineering
[2] Materials and Energy Research Center (MERC),Solar Energy Group, Energy Department
来源：
Heat and Mass Transfer | 2016年 / 52卷
关键词：
Surfactant; Zeta Potential; Sedimentation Layer; Base Fluid; Sedimentation Velocity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
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页码：55 / 62
页数：7
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