Giant Barocaloric Effects in Natural Rubber: A Relevant Step toward Solid-State Cooling,ACS Macro Letters

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Giant Barocaloric Effects in Natural Rubber: A Relevant Step toward Solid-State Cooling
ACS Macro Letters ( IF 5.1 ) Pub Date : 2017-12-14 00:00:00 , DOI: 10.1021/acsmacrolett.7b00744
N M Bom ₁ , W Imamura _{1,

2} , E O Usuda _{1,

3} , L S Paixão ₁ , A M G Carvalho ₁

Affiliation

Solid-state cooling based on i-caloric effects has shown to be a promising alternative to the conventional refrigeration devices. Only very recently, the research on barocaloric materials is receiving a deal of attention due to the demonstration of giant barocaloric effects in shape-memory alloys. Regarding polymers, there is still a lack of literature, despite their high caloric potential. Thus, we present here giant barocaloric effects in natural rubber, a low-cost and environmental friendly elastomer polymer. The maximum values of entropy and temperature changes are larger than those previously reported for any promising barocaloric material. Moreover, the huge normalized temperature change and refrigerant capacity exhibited by natural rubber confirm its high potential for cooling applications. We also verify a relevant dependence of the barocaloric effect on the glass transition in natural rubber. Our findings suggest that commercial refrigeration devices based on barocaloric effects from elastomer polymers can be envisaged in the near future.

中文翻译：

天然橡胶中的巨大气压热效应：向固态冷却迈出的重要一步

基于i的固态冷却-热量效应已被证明是传统制冷设备的有希望的替代品。直到最近，由于在形状记忆合金中展示了巨大的压力热效应，对压力热材料的研究才受到广泛关注。关于聚合物，尽管它们具有很高的热量潜力，但仍然缺乏文献。因此，我们在这里展示了天然橡胶中巨大的气压热效应，这是一种低成本且环保的弹性体聚合物。熵和温度变化的最大值大于先前报道的任何有希望的气压热材料的最大值。此外，天然橡胶表现出的巨大标准化温度变化和制冷剂容量证实了其在冷却应用方面的巨大潜力。我们还验证了气压热效应对天然橡胶玻璃化转变的相关依赖性。我们的研究结果表明，在不久的将来可以设想基于弹性体聚合物的气压效应的商业制冷设备。

更新日期：2017-12-14

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