The Use of Nanoporous Materials for Mechanical Energy Dissipation

Different approaches can be considered to use nanoporous materials for mechanical energy storage. First the most well known is founded on the use of hydrophobic porous solids in which water is forced to enter into the pores by mechanical pressure. To study this mechanical to surface energy transformation a specific device has been settled relying on the use of a high pressure pump. Moreover the system's compression and decompression is studied in a microcalorimeter to be able to calculate the total energy balance. Different Zeolitic Imidazolate Frameworks (ZIF) are thus studied and their energetic performances can be compared to those obtained with a second approach systems consisting in flexible Metal Organic Frameworks (MOF) that are submitted to a mechanical pressure with a transmitting fluid. This later should not penetrate in the pores.