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Energy Storage during Compression of Metal–Organic Frameworks
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-22 , DOI: 10.1021/jacs.7b01593 Yu-Run Miao 1 , Zhi Su 1 , Kenneth S. Suslick 1
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-22 , DOI: 10.1021/jacs.7b01593 Yu-Run Miao 1 , Zhi Su 1 , Kenneth S. Suslick 1
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Practical applications of metal-organic framework (MOF) materials require an in-depth understanding of their mechanical properties. We have investigated the mechanical properties and energy absorption behavior of single crystals of four isostructural UiO-type MOFs under uniaxial compression. In situ nanocompression experiments were used to measure the mechanical behavior of individual MOF nanocrystals under compression within a transmission electron microscope. The plasticity and endothermicity during deformation of MOFs shows a surprising potential for absorption and dissipation of mechanical shock. At compressive stress below 2 GPa, relatively small amounts of energy (<0.3 kJ/g) are absorbed by the compression of these MOFs. As the stress was increased, however, the energy absorption was significantly enhanced. Above 2 GPa, the energy absorption typically reaches 3-4 kJ/g; for comparison, the energy release in the explosion of TNT is ∼4 kJ/g. Gram for gram, MOFs can absorb as much energy as a high explosive can release.
中文翻译：
金属-有机框架压缩过程中的能量储存
金属有机骨架 (MOF) 材料的实际应用需要深入了解其机械性能。我们研究了单轴压缩下四种等结构 UiO 型 MOF 单晶的机械性能和能量吸收行为。原位纳米压缩实验用于测量单个 MOF 纳米晶体在透射电子显微镜内压缩下的机械行为。MOFs 变形过程中的塑性和吸热性显示出惊人的机械冲击吸收和消散潜力。在低于 2 GPa 的压应力下，这些 MOF 的压缩吸收了相对少量的能量 (<0.3 kJ/g)。然而，随着应力的增加，能量吸收显着增强。高于 2 GPa，能量吸收通常达到3-4 kJ/g；相比之下，TNT 爆炸释放的能量约为 4 kJ/g。以克为单位，MOF 可以吸收与炸药释放的能量一样多的能量。
更新日期：2017-03-22
中文翻译：
金属-有机框架压缩过程中的能量储存
金属有机骨架 (MOF) 材料的实际应用需要深入了解其机械性能。我们研究了单轴压缩下四种等结构 UiO 型 MOF 单晶的机械性能和能量吸收行为。原位纳米压缩实验用于测量单个 MOF 纳米晶体在透射电子显微镜内压缩下的机械行为。MOFs 变形过程中的塑性和吸热性显示出惊人的机械冲击吸收和消散潜力。在低于 2 GPa 的压应力下，这些 MOF 的压缩吸收了相对少量的能量 (<0.3 kJ/g)。然而，随着应力的增加，能量吸收显着增强。高于 2 GPa，能量吸收通常达到3-4 kJ/g；相比之下，TNT 爆炸释放的能量约为 4 kJ/g。以克为单位，MOF 可以吸收与炸药释放的能量一样多的能量。
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