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Supergiant Barocaloric Effects in Acetoxy Silicone Rubber over a Wide Temperature Range: Great Potential for Solid-state Cooling
Chinese Journal of Polymer Science ( IF 4.3 ) Pub Date : 2020-05-22 , DOI: 10.1007/s10118-020-2423-9
William Imamura , Érik Oda Usuda , Lucas Soares Paixão , Nicolau Molina Bom , Angelo Marcio Gomes , Alexandre Magnus Gomes Carvalho

Solid-state cooling based on caloric effects is considered a viable alternative to replace the conventional vapor-compression refrigeration systems. Regarding barocaloric materials, recent results show that elastomers are promising candidates for cooling applications around room-temperature. In the present paper, we report supergiant barocaloric effects observed in acetoxy silicone rubber—a very popular, low-cost and environmentally friendly elastomer. Huge values of adiabatic temperature change and reversible isothermal entropy change were obtained upon moderate applied pressures and relatively low strains. These huge barocaloric changes are associated both to the polymer chain rearrangements induced by confined compression and to the first-order structural transition. The results are comparable to the best barocaloric materials reported so far, opening encouraging prospects for the application of elastomers in near future solid-state cooling devices.



中文翻译:

乙氧基硅橡胶在宽温度范围内的超级压力效应:固态冷却的巨大潜力

基于热效应的固态冷却被认为是替代常规蒸汽压缩制冷系统的可行选择。关于压力材料,最近的结果表明,弹性体是有望在室温下冷却的候选材料。在本文中,我们报告了在乙氧基硅橡胶(一种非常受欢迎的低成本,环保弹性体)中观察到的超强压力效应。在适度的施加压力和相对较低的应变下,可获得绝热温度变化和可逆等温熵变化的巨大值。这些巨大的压力变化既与有限压缩引起的聚合物链重排有关,也与一级结构转变有关。结果与迄今报道的最好的压力材料相当,

更新日期:2020-07-25
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