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Title: Turning Molecular Springs into Nano-Shock Absorbers: The Effect of Macroscopic Morphology and Crystal Size on the Dynamic Hysteresis of Water Intrusion-Extrusion into-from Hydrophobic Nanopores
Authors: Zajdel, Paweł
Lowe, Alexander Rowland
Chorążewski, Mirosław
Grosu, Yaroslav
Keywords: intrusion-extrusion; mechanical energy conversion; metal-organic framework; nanoporous materials
Issue Date: 2022
Citation: "ACS Applied Materials & Interfaces", T. 14, nr 23, 2022, s. 26699-26713
Abstract: Controlling the pressure at which liquids intrude (wet) and extrude (dry) a nanopore is of paramount importance for a broad range of applications, such as energy conversion, catalysis, chromatography, separation, ionic channels, and many more. To tune these characteristics, one typically acts on the chemical nature of the system or pore size. In this work, we propose an alternative route for controlling both intrusion and extrusion pressures via proper arrangement of the grains of the nanoporous material. To prove the concept, dynamic intrusion–extrusion cycles for powdered and monolithic ZIF-8 metal–organic framework were conducted by means of water porosimetry and in operando neutron scattering. We report a drastic increase in intrusion–extrusion dynamic hysteresis when going from a fine powder to a dense monolith configuration, transforming an intermediate performance of the ZIF-8 + water system (poor molecular spring) into a desirable shock-absorber with more than 1 order of magnitude enhancement of dissipated energy per cycle. The obtained results are supported by MD simulations and pave the way for an alternative methodology of tuning intrusion–extrusion pressure using a macroscopic arrangement of nanoporous material.
Description: Paweł Łukasz Zajdel, David G. Madden, Robin Babu, Marco Tortora, Diego Mirani, Nikolay Nikolaevich Tsyrin, Luis Bartolomé, Eder Amayuelas, David Fairen-Jimenez, Alexander Rowland Lowe, Mirosław Adam Chorążewski, Juscelino B. Leao, Craig M. Brown, Markus Bleuel, Victor Stoudenets, Carlo Massimo Casciola, María Echeverría, Francisco Bonilla, Giulia Grancini, Simone Meloni, Yaroslav Grosu
DOI: 10.1021/acsami.2c04314
ISSN: 1944-8244
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