Paper Title:
Reduction of Supercooling of Water by TiO2 Nanoparticles as Nucleating Agent
  Abstract

The solidification behaviors of titania(TiO2)-water nanofluid and deionized water (DI water) were investigated using differential scanning calorimetry (DSC) at cooling rates of 1.5—9.0 °C/min. The nanofluid with 0.3 wt% TiO2 nanoparticles was prepared by dispersing the nanoparticles into DI water. The dispersion and stability was confirmed by a particle size and zeta potential analyzer. Experimental results show that the solidification temperature of the TiO2-water nanofluid was higher than that of DI water at the same cooling rate. The contact angles of TiO2 and the interior surface of the sample holder were measured, and the free energy barriers (FEB) of nucleation of the TiO2-water nanofluid and DI water were calculated. It was found that the FEB of nucleation induced by the TiO2 nanoparticles was lower than that by the flat surface, resulting in lower supercooling degree.

  Info
Periodical
Advanced Materials Research (Volumes 236-238)
Edited by
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
Pages
1935-1938
DOI
10.4028/www.scientific.net/AMR.236-238.1935
Citation
S. P. Mo, Y. Chen, L. S. Jia, X. Li, X. L. Luo, "Reduction of Supercooling of Water by TiO2 Nanoparticles as Nucleating Agent", Advanced Materials Research, Vols. 236-238, pp. 1935-1938, 2011
Online since
May 2011
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Price
$32.00
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