Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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One-step Physical Method for Synthesis of Cu Nanofluid in Ethylene Glycol

  • Bac, L.H. (School of Materials Science Engineering, University of Ulsan) ;
  • Yun, K.S. (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, J.S. (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, J.C. (School of Materials Science Engineering, University of Ulsan) ;
  • Rhee, C.K. (Korean Atomic Energy Research Institute)
  • Received : 2010.11.05
  • Accepted : 2010.12.02
  • Published : 2010.12.28
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Abstract

The Cu nanofluid in ethylene glycol was prepared by electrical explosion of wire, a novel one-step method. The X-ray diffraction, field emission scanning electron microscope and transmission electron microscope were used to study the properties of Cu nanoparticles. The results showed that the nanoparticles were consisted of pure face-centered cubic structure and near spherical shape with average grain size of 65 nm. Ultraviolet-visible spectroscopy (UV-Vis) confirmed Cu nanoparticles with a single absorbance peak of Cu surface plasmon resonance band at 600 nm. The nanofluid was found to be stable due to high positive zeta potential value, +51 mV. The backscattering level of nanofluid in static stationary was decreased about 2% for 5 days. The thermal conductivity measurement showed that Cu-ethylene glycol nanofluid with low concentration of nanoparticles had higher thermal conductivity than based fluid. The enhancement of thermal conductivity of nanofluid at a volume fraction of 0.1% was approximately 5.2%.

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