Enhancing Thermal Conductivity and Photo-Driven Thermal Energy Charging/Discharging Rate of Annealed CMK-3 Based Phase Change Material

Yanfeng Chen; Cuiyin Liu; Yue Situ; Jian Liu; Hong Huang

doi:10.3390/nano9030364

Enhancing Thermal Conductivity and Photo-Driven Thermal Energy Charging/Discharging Rate of Annealed CMK-3 Based Phase Change Material

Nanomaterials (Basel). 2019 Mar 5;9(3):364. doi: 10.3390/nano9030364.

Authors

Yanfeng Chen¹, Cuiyin Liu², Yue Situ³, Jian Liu⁴, Hong Huang⁵

Affiliations

¹ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China. chen_yf@163.com.
² School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China. liu_cy@126.com.
³ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China. situyue@scut.edu.cn.
⁴ Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China. liujian@dgut.edu.cn.
⁵ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China. cehhuang@scut.edu.cn.

Abstract

In this work, the CMK-3 is successfully prepared with SBA-15 as the template and first annealed to 2000 °C to improve thermal conductivity. The annealed CMK-3 has a thermal conductivity of 6.981 W m^-1 K^-1 higher than un-annealed CMK-3. The annealed CMK-3 is used to encapsulate the RT44HC, and RT44HC/annealed CMK-3 has 10-fold of thermal conductivity and enhanced thermal stability than RT44HC. The RT44HC/annealed CMK-3 has a large melting enthalpy of 177.8 J g^-1 and good thermal stability. The RT44HC/annealed CMK-3 has optical absorptive coefficient of visible range of solar spectrum, which identify seven-fold higher than RT44HC. The RT44HC/annealed CMK-3 has great photo-thermal performance, and the photo-driven energy charging and discharging rate of RT44HC/annealed CMK-3 is almost 30-fold larger than the RT44HC. The results show that the annealed CMK-3 is a great mesoporous carbon nanomaterial for phase change materials and the annealed CMK-3 based phase change material has great potential in solar thermal utilizations such as solar water heating system and solar heating building systems.

Keywords: annealed CMK-3; phase change material; photo-driven charging and discharging rate; solar thermal systems; thermal conductivity.

Abstract

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