Open Access Nano Express

A Kind of Nanofluid Consisting of Surface-Functionalized Nanoparticles

Xuefei Yang and Zhen-hua Liu*

Author Affiliations

School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, 200240, Shanghai, People’s Republic of China

For all author emails, please log on.

Nanoscale Research Letters 2010, 5:1324-1328  doi:10.1007/s11671-010-9646-6

Published: 25 May 2010

Abstract

A method of surface functionalization of silica nanoparticles was used to prepare a kind of stable nanofluid. The functionalization was achieved by grafting silanes directly to the surface of silica nanoparticles in silica solutions (both a commercial solution and a self-made silica solution were used). The functionalized nanoparticles were used to make nanofluids, in which well-dispersed nanoparticles can keep good stability. One of the unique characteristics of the nanofluids is that no deposition layer forms on the heated surface after a pool boiling process. The nanofluids have applicable prospect in thermal engineering fields with the phase-change heat transfer.

Keywords:
Nanofluid; Surface functionalization; Nanoparticle; Heat transfer; Phase change