Effects of Preparation Parameters on

TiO2/water Nanofluid Stability

T. Meesuppung and P. Ngaotrakanwiwat*

Department of Chemical Engineering, Faculty of Engineering, Burapha University

169 Long-Hard Bangsaen Road, Saen Sook, Mueang District, Chonburi 20131, Thailand

*e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Manuscript received August 9, 2013

Revised September 17, 2013

ABSTRACT

Nanofluid is of great interest as innovative medium for heat transfer unit due to high thermal conductivity of particles suspended in base fluid. Stability of nanofluid is a critical barrier of its versatile applications. This research aims at the preparation of high stability TiO2/water nanofluid. The variation of the amount of TiO2 particle containing in water and concentration of dispersant (CTAB; Cetyl Trimethyl Ammonium Bromide) were investigated. Moreover, the effect of temperature change during the operation was monitored. The results showed that nanofluid prepared at volumetric ratio of TiO2/water up to 6.0% (v/v) without CTAB has the good stability. However, in order to get the higher thermal conductivity, nanofluid containing TiO2/water 9.0% (v/v) with CTAB 1.92x10-4 mol/L at 30˚C exhibited the highest stability. Nevertheless, the stability decreased with increasing of temperature. 

Keywords: Nanofluid, Stability, Titanium dioxide, Cetyl Trimethyl Ammonium Bromide (CTAB) 

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