Colossal barocaloric effects near room temperature in plastic crystals of neopentylglycol
Colossal barocaloric effects near room temperature in plastic crystals of neopentylglycol
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DOI：
10.1038/s41467-019-09730-9
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发表时间：
2019-04-18
影响因子：
16.6
通讯作者：
Tamarit, J. -Ll.
中科院分区：
文献类型：
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作者：
Lloveras, P.;Aznar, A.;Tamarit, J. -Ll.
目前，人们对用显示磁热、电热或机械热效应的固体材料代替制冷和空调中使用的有害的挥发性氢氟碳流体非常感兴趣。然而，所有这些热物质中的场驱动的热变化相对于它们的流体对应物而言都是不足的。在这里，我们表明，由于分子重构，新戊二醇（CH 3）（2）C（CH 2OH）（2）的塑性晶体在室温附近显示出极大的压力驱动的热变化，这些变化优于在任何类型的热材料中观察到的变化，并且这些变化与氢氟烃中商业开发的变化相当。我们在塑料晶体中发现了巨大的压热效应，这将把压热材料带到研究和开发的最前沿，以便在不影响性能的情况下实现安全环保的冷却。
There is currently great interest in replacing the harmful volatile hydrofluorocarbon fluids used in refrigeration and air-conditioning with solid materials that display magnetocaloric, electrocaloric or mechanocaloric effects. However, the field-driven thermal changes in all of these caloric materials fall short with respect to their fluid counterparts. Here we show that plastic crystals of neopentylglycol (CH3)(2)C(CH2OH)(2) display extremely large pressure-driven thermal changes near room temperature due to molecular reconfiguration, that these changes outperform those observed in any type of caloric material, and that these changes are comparable with those exploited commercially in hydrofluorocarbons. Our discovery of colossal barocaloric effects in a plastic crystal should bring barocaloric materials to the forefront of research and development in order to achieve safe environmentally friendly cooling without compromising performance.