The Use of Nanoporous Materials for Mechanical Energy Dissipation

Beurroies, Isabelle; Presle, Damien; Rodriguez, Julien; Denoyel, Renaud

doi:10.1061/9780784480779.048

Cited by 1 publication

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“…Some studies have included the examination of the change in lattice parameters and unit cell volume of siliceous zeolites and pore-filling process with water, while simultaneously studying the structure of confined water. Recently the range of porous materials was extended to metal–organic frameworks (MOFs). − …”

Section: Introductionmentioning

confidence: 99%

Effect of Flexibility and Nanotriboelectrification on the Dynamic Reversibility of Water Intrusion into Nanopores: Pressure-Transmitting Fluid with Frequency-Dependent Dissipation Capability

Lowe

Tsyrin

Chorążewski

et al. 2019

ACS Appl. Mater. Interfaces

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In this article, the effect of a porous material’s flexibility on the dynamic reversibility of a nonwetting liquid intrusion was explored experimentally. For this purpose, high-pressure water intrusion together with high-pressure in situ small-angle neutron scattering were applied for superhydrophobic grafted silica and two metal–organic frameworks (MOFs) with different flexibility [ZIF-8 and Cu2(tebpz) (tebpz = 3,3′,5,5′tetraethyl-4,4′-bipyrazolate)]. These results established the relation between the pressurization rate, water intrusion–extrusion hysteresis, and porous materials’ flexibility. It was demonstrated that the dynamic hysteresis of water intrusion into superhydrophobic nanopores can be controlled by the flexibility of a porous material. This opens a new area of applications for flexible MOFs, namely, a smart pressure-transmitting fluid, capable of dissipating undesired vibrations depending on their frequency. Finally, nanotriboelectric experiments were conducted and the results showed that a porous material’s topology is important for electricity generation while not affecting the dynamic hysteresis at any speed.

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