Enhanced thermal conductivity of copper-doped polyethylene glycol/urchin-like porous titanium dioxide phase change materials for thermal energy storage |
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| Authors: | Junying Hou Yaya Wang Jingchun Liu Jianguo Zhao Sifang Long Jianjun Hao |
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| Affiliation: | College of Mechanical and Electrical Engineering, Agriculture University of Hebei, Hebei, People's Republic of China |
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| Abstract: | A composite phase change material (PCM) of copper-doped polyethylene glycol (PEG) 2000 impregnated urchin-like porous titanium dioxide (TiO2) microspheres (PEG/TiO2) was successfully synthesised. The urchin-like porous TiO2 structures contain hollow cavities that can provide a high PEG loading capacity of up to 80 wt%. Copper nanoparticles were uniformly dispersed on the outer and inner surfaces of the 0.8PEG/TiO2 as additives to enhance the thermal conductivity of the composite PCM. The latent heat of the Cu/PEG/TiO2 porous composite PCM reached 133.8 J/g, and the thermal conductivity was 0.58 W/(mK), which was 152.2% higher than that of TiO2 and 38.1% higher than 0.8PEG/TiO2. Moreover, the Cu/PEG/TiO2 porous composite PCM has excellent thermal stability and reliability. |
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| Keywords: | phase change material thermal conductivity thermal energy storage urchin-like porous TiO2 |
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