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Role of Hydrogen Bonding in Phase Change Materials

机译:氢键在相变材料中的作用

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摘要

Phase change materials (PCMs), which melt in the temperature range of 100-230 degrees C, are a promising alternative for the storage of thermal energy. In this range, large amounts of energy available from solar-thermal, or other forms of renewable heat, can be stored and applied to domestic or industrial processes, or to an organic Rankine cycle (ORC) engine to generate electricity. The amount of energy absorbed is related to the latent heat of fusion (Delta H-f) and is often connected to the extent of hydrogen bonding in the PCM. Herein, we report fundamental studies, including crystal structure and Hirshfeld surface analysis, of a family of guanidinium organic salts that exhibit high values of Delta H-f, demonstrating that the presence and strength of H-bonds between ions play a key role in this property.
机译:相变材料(PCM),其在100-230℃的温度范围内熔化,是储存热能的有希望的替代方案。 在此范围内,可以存储和应用来自太阳能 - 热或其他形式的可再生热量的大量能量,或者对国内或工业过程或有机朗肯循环(ORC)发动机产生电力。 吸收的能量的量与融合(Delta H-F)的潜热有关,并且通常与PCM中的氢键的程度连接。 在此,我们报告了一种脱霉素有机盐的家族的基本研究,包括晶体结构和HIRSHFELD表面分析,其表现出ΔH-F的高值,表明离子之间的H键的存在和强度在该特性中起主要作用。

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