Thermal conductivity enhancement of lauric acid phase change nanocomposite in solid and liquid state with single-walled carbon nanohorn inclusions
Thermal conductivity enhancement of lauric acid phase change nanocomposite in solid and liquid state with single-walled carbon nanohorn inclusions
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DOI：
10.1016/j.tca.2014.12.004
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发表时间：
2015-01-20
影响因子：
3.5
通讯作者：
Kohno, Masamichi
中科院分区：
文献类型：
--
作者：
Harish, Sivasankaran;Orejon, Daniel;Kohno, Masamichi
我们制备了月桂酸基相变纳米复合材料嵌入化学功能化的单壁碳纳米角，并测量了其热性能。我们报告对比增强这种纳米复合材料的导热性在固相和液相中的纳米角夹杂物相同的负载。在固相和液相中的最大热导率增强在2体积%被发现是类似于37和类似于11%，分别。纳米复合材料的导热系数的增强进行了比较，有效介质理论的计算，考虑到界面热传输的作用。模型计算表明，Kapitza电阻是一个数量级低的固-固界面相比，固-液界面。差示扫描量热法研究表明，纳米复合材料的相变温度和焓略有增加的原始材料。这种具有增强的热传输和相变焓的纳米复合材料使其成为热能储存应用的有希望的候选者。(C)2014爱思唯尔有限公司版权所有。
We prepared lauric acid based phase change nanocomposite embedded with chemically functionalized single-walled carbon nanohorns and measured its thermal properties. We report contrasting enhancements in thermal conductivity of such nanocomposites in the solid and liquid phase for the same loading of nanohorn inclusions. Maximum thermal conductivity enhancement in solid and liquid phase at 2 vol% is found to be similar to 37 and similar to 11%, respectively. The nanocomposites' thermal conductivity enhancement is compared with calculations of effective medium theory considering the role of interfacial thermal transport. Model calculations show that Kapitza resistance is an order of magnitude lower at the solid-solid interface compared to the solid-liquid interface. Differential scanning calorimetry study of the nanocomposites shows that the phase change temperature and enthalpy marginally increases to that of pristine material. Such a nanocomposite with enhanced thermal transport and phase change enthalpy makes it a promising candidate for thermal energy storage applications. (C) 2014 Elsevier B.V. All rights reserved.