Effect of carbon nanotube on thermal properties of copper foam/paraffin composite phase change materials
BAO Shengyou1, AN Junjie1, MA Li2, WEI Qiuping1, BO Zhenhai1, ZHOU Kechao2
1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
Abstract：Copper foam (CF), carbon nanotubes (CNT) and paraffin were used to prepare CF/mixed CNT/paraffin and CF/catalyzed CNT/paraffin composite phase change materials (PCM). The mass ratio of CNT and paraffin was 1:99. SEM and Raman spectra were used to characterize the morphology and quality of the samples. The thermal conductivity and phase change behavior of phase change materials were measured by laser thermal conductivity tester and differential scanning calorimeter. The results show that the composite PCM is well compounded, and the thermal conductivity of paraffin can be improved by introducing two kinds of CNT. Even though the quality of mixed CNT is better than that of catalytic CNT, compared with the thermal conductivity of CF/mixed CNT/paraffin composite (3.28 W/(m∙K)), the thermal conductivity of CF/catalytic CNT/paraffin sample increases to 3.94 W/(m∙K). In addition, two kinds of CNT can effectively improve the influence of supercooling degree and shape stability of the paraffin.
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2020, Vol. 25 
