金属有机框架中的约束作为利用固态液态巴卡罗热效应的途径
Confinement in metal-organic frameworks as a route to harnessing liquid barocalorics in the solid-state
AI总结：
通过将固-液巴卡罗热材料硬脂酸限制在功能化MOF的纳米孔中，实现了固态材料中巨巴卡罗热效应的保留与主动调控，为固态液态巴卡罗热材料的应用提供了新途径。
摘要：
在氢氟碳化合物的液-气转变中，巴卡罗热效应（BC）驱动了大多数用于供暖、通风和空调领域的商业技术。然而，这些液体具有巨大的全球变暖潜力，而替代气体则效率较低、有毒或易燃。固-固和固-液巴卡罗热材料具有零全球变暖潜力，甚至可以提高当前设备的效率。尽管固-液巴卡罗热材料通常优于固-固巴卡罗热材料，但后者在避免泄漏、易于处理和可回收性方面更具优势，从而促进废物管理。在这里，我们将固-液巴卡罗热材料硬脂酸限制在功能化金属有机框架（MOF）的纳米孔中，并证明在固态材料中保留了巨大的巴卡罗热特性。此外，孔表面与巴卡罗热材料之间的增强相互作用使热响应能够主动控制，而不是被动封装。我们的结果为在功能化MOF中广泛利用和调节固-液巴卡罗热材料的巨巴卡罗热效应开辟了新的途径，而无需相关的工程弊端。
英文摘要：
Barocaloric (BC) effects at liquid-vapor transitions in hydrofluorocarbons drive most commercial technologies used for heating and cooling in the heating, ventilation and air-conditioning sector. However, these fluids suffer from huge global warming potential and alternative gases are less efficient, toxic or flammable. Solid-solid and solid-liquid BC materials have zero global warming potential and could even improve on current device efficiencies. Whilst solid-liquid BCs typically outperform solid-solid BCs, the latter are advantageous as they avoid leaks and present easier handling and recyclability thus facilitating waste management. Here we confine the solid-liquid BC stearic acid inside the nanopores of a functionalised metal-organic framework (MOF) and demonstrate that the colossal BC properties are retained in a solid-state material. Moreover, the enhanced interactions between the pore surface and the BC material allow a level of active control over the thermal response, as opposed to passive encapsulation. Our results open novel avenues to exploit and tune colossal BC effects in a wide range of combinations of solid-liquid BC materials embedded within functionalized MOFs, without the associated engineering drawbacks.
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