Fabrication of Cu Based Nanofluid with Superior Dispersion

The attractive force between the nanoparticles can cause them to aggregate. Therefore, nanoparticles have to be dispersed by different methods, in order to utilize their unique material characteristics completely. This study aims to use the self-developed nanofluids synthesis system to produce a Cu-based nanofluid with good suspension stability and particle dispersion. Parameters such as peak current, breakdown voltage and pulse-duration are found to influence the characteristics of the generated nanoparticles. With a set of designed process parameters, the developed system can generate the CuO nanofluid with an average particle diameter of less than 100 nm and with a well improved size distribution. The XRD is used to analyze the composition and structure of the fabricated nanoparticles, Zeta potential is used to analyze their suspension stability, FE-SEM are used to observe the morphologies and sizes of the particles. Furthermore, the relationship between the pH value and Zeta potential of CuO nanofluids, and the sedimentation behaviors of aqueous oxidized copper nanofluids at different pH values are also discussed. The experimental results revealed that the self-developed nanofluids synthesis system can be used to prepare CuO, and Cu phase nanoparticles efficiently, and the nanoparticles suspension can be stabilized for a period of time longer than 15 months.