Carbon nanotube-Cu foam hybrid reinforcements in composite phase change materials with enhanced thermal conductivity
Carbon nanotube-Cu foam hybrid reinforcements in composite phase change materials with enhanced thermal conductivity
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碳纳米管-铜泡沫混合增强复合相变材料具有增强的导热性
DOI：
10.1016/j.matdes.2019.107709
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发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
Zhiming Yu
中科院分区：
文献类型：
--
作者：
Wei Zhu;Naixiu Hu;Quiping Wei;Long Zhang;Haichao Li;Jingting Luo;Cheng-Te Lin;Li Ma;Kechao Zhou;Zhiming Yu
有机相变材料由于其相变潜热的优势，被认为是最有前途的储能和温控材料之一。然而，它们固有的低热导率（λ）是致命的弱点，并且最常见的解决方案是利用导热增强材料来制造复合PCM。如何提高导热增强材料的导热效率是目前研究的热点。在这里，通过高温管式炉工艺制造了CNT-Cu泡沫混杂增强体。与传统的碳膜包覆泡沫金属不同，在Ni催化剂的作用下，碳纳米管在泡沫铜表面呈放射状生长，其长度与孔径相当，不仅减少了泡沫骨架内部的低λ区域，而且连接了泡沫的各个分支，提高了整个增强体的完整性，复合材料的导热系数由石蜡的0.105 W·m-1·K-1提高到3.49 W·m-1·K-1。此外，该增强体还具有补偿相变潜热损失和抑制过冷的能力，在相变储能和温度控制方面具有广阔的应用前景。
Organic phase change materials (PCM) have been regarded as one of the most promising candidates for the application of energy storage and temperature control due to their advantages in latent heat. However, their intrinsically low thermal conductivity (λ) is the Achilles heel, and the most common solution is to utilize thermal conductive reinforcements to fabricate composite PCMs. The research focus remains how to promote the efficiency of thermal conductive reinforcements. Here, a CNT-Cu foam hybrid reinforcement was fabricated through a high temperature tube furnace process. Different from conventional carbon film coated metal foam, CNTs with the length comparable to the pore size were radially grown on the surface of Cu foam with Ni catalysts, which can not only reduce the low-λ regions inside the foam skeleton, but also connect every branches of the foam to improve the integrity of the whole reinforcement, and the thermal conductivity of the composite was promoted to 3.49 W·m−1·K−1from 0.105 W·m−1·K−1of paraffin. Moreover, this reinforcement exhibited abilities to compensate the loss of latent heat and suppress the supercooling of the composite, indicating their great prospects in the application of phase change energy storage and temperature control.
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DOI：
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发表时间：
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影响因子：
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