Phase transfer based synthesis and thermophysical properties of Au/Therminol VP-1 nanofluids

• Published in: Progress in natural science Vol. 23; no. 3; pp. 338 - 342
• Main Authors: Wang, Caixia, Yang, Jun, Ding, Yulong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2013; IPE-UoL Joint Institute for Energy Storage Research, Institute of Process Engineering IPE, Chinese Academy of Sciences, Beijing 100190, China
• Subjects: Au nanoparticles; Nanofluids; nanoparticles; Phase; Phase transfer; Therminol; Therminol VP-1; transfer; VP-1; Therminol VP-1; Au nanoparticles; Phase transfer; Nanofluids
• ISSN: 1002-0071
• DOI: 10.1016/j.pnsc.2013.04.006

This paper reports a phase transfer based wet chemistry method for the preparation of Au/VP-1 nanofluids.The method involves the transfer of AuCl 4 ions from water to the base liquid Therminol VP-1,followed by the reduction of AuCl 4 ions using NaBH 4.The prepared nanofluids are characterized for their thermophysical properties and stability.The results show that the mass concentration of Au particles has a significant effect on the stability of Au/VP-1 nanofluids.An increase in the Au concentration results in a higher extent of agglomeration among the particles,leading to a decrease in the nanofluid stability.The results also show that the introduction of 0.005-0.05% Au nanoparticles enhances the thermal conductivity of the fluids by up to 6.5%,whereas the viscosity increase is minimal.