Controllable thermal rectification realized in binary phase change composites.
Controllable thermal rectification realized in binary phase change composites.
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DOI：
10.1038/srep08884
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发表时间：
2015-03-09
影响因子：
4.6
通讯作者：
Zou R
中科院分区：
文献类型：
--
作者：
Chen R;Cui Y;Tian H;Yao R;Liu Z;Shu Y;Li C;Yang Y;Ren T;Zhang G;Zou R
Phase transition is a natural phenomenon happened around our daily life, represented by the process from ice to water. While melting and solidifying at a certain temperature, a high heat of fusion is accompanied, classified as the latent heat. Phase change material (PCM) has been widely applied to store and release large amount of energy attributed to the distinctive thermal behavior. Here, with the help of nanoporous materials, we introduce a general strategy to achieve the binary eicosane/PEG4000 stuffed reduced graphene oxide aerogels, which has two ends with different melting points. It's successfully demonstrated this binary PCM composites exhibits thermal rectification characteristic. Partial phase transitions within porous networks instantaneously result in one end of the thermal conductivity saltation at a critical temperature, and therefore switch on or off the thermal rectification with the coefficient up to 1.23. This value can be further raised by adjusting the loading content of PCM. The uniqueness of this device lies in its performance as a normal thermal conductor at low temperature, only exhibiting rectification phenomenon when temperature is higher than a critical value. The stated technology has broad applications for thermal energy control in macroscopic scale such as energy-efficiency building or nanodevice thermal management.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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DOI：
10.1109/2944.669471
发表时间：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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