Title: Investigation on the preparation and thermal properties of Ag-H₂O nanofluids with different morphology

Authors: Jinkai Li; Wenzhi Wang; Zongming Liu

Addresses: School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China ' School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China ' School of Materials Science and Engineering, University of Jinan, Jinan, Shandong 250022, China

Abstract: The triangular flake and wire shaped silver-water (Ag-H₂O) nanofluids with good suspension have been achieved via one-step and two-step method, respectively. The thermal conductivity and viscosity of two kinds of Ag-H₂O nanofluids were both higher than the based fluids (H₂O). The results showed that the thermal conductivity of the two kinds of Ag-H₂O nanofluids increased with the content of Ag nanoparticles and temperature increasing. The rheological behaviours analysis showed that two kinds of Ag-H₂O nanofluids observed the Newtonian behaviours whose viscosity were close to the water and increased with Ag incorporation. The thermal conductivity of the triangular flake shaped nanofluids was higher than that of the wire shaped nanofluids in the same mass fraction and temperature while the viscosity was in reverse. The effect mechanism of solid content, temperature and morphology on the thermal property of Ag-H₂O nanofluids has been discussed in detail.

Keywords: Ag-H₂O nanofluids; shaped effect; thermal conductivity; viscosity.

DOI: 10.1504/IJNM.2018.093474

International Journal of Nanomanufacturing, 2018 Vol.14 No.3, pp.242 - 258

Received: 17 May 2017
Accepted: 26 Oct 2017
Published online: 26 Jul 2018 *

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