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research-article

Improving the supercooling degree of TiO2 suspensions by coupling with zirconium phosphate nanoplatelets

[+] Author and Article Information
Xiao Yuan

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
yx910214@163.com

Songping Mo

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
mosp@ustc.edu

Ying Chen

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
chenying@gdut.edu.cn

Lisi Jia

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
jialisi@gdut.edu.cn

Tao Yin

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
yintao@gdut.edu.cn

Zhi Yang

Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
yangzhi0610@163.com

Zhengdong Cheng

Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station 77840, USA
zcheng@mail.che.tamu.edu

1Corresponding author.

ASME doi:10.1115/1.4038558 History: Received April 26, 2017; Revised October 14, 2017

Abstract

Phase-change materials (PCM) with low supercooling degree (SD) are important in cold thermal energy storage applications. The SD of nanosuspension PCM usually decreases with increasing nanoparticle concentration. However, the performance variation of nanosuspension PCM at high concentrations has been rarely studied, though it is important because nanoparticles tend to aggregate. In this paper, the supercooling degree and dispersion stability of nanosuspensions of TiO2, zirconium phosphate (ZrP) and TiO2 coupled with zirconium phosphate (TiO2-ZrP) were investigated at nanoparticle concentrations up to 5.0 wt.%. Results show that the supercooling degree of TiO2 suspension did not remarkably varied with mass concentrations above 2.0 wt. %. In contrast, the supercooling degree of TiO2-ZrP and ZrP were low and continuously decreased with increasing mass concentration of nanoparticles. The dispersion stability of TiO2-ZrP suspension improved compared with that of TiO2 suspension. Hence, TiO2-ZrP suspension provided more nucleation sites than TiO2 suspension to induce heterogeneous in water.

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