Issue 11, 2022

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Abstract

Ionogel-based flexible sensors are widely applied in wearable biomedical devices and soft robots. However, the abandoned ionic sensors are rapidly turning into e-waste. Here, we harness the porosity and the coordination of metal sites of metal–organic frameworks (MOFs) to develop physically crosslinked ionogels, which are composed of polymer chains that coordinate with the MOF metal sites. The covalent crosslinking of the host material transformed into reversible bond interactions that significantly enhance the mechanical properties of the MOF-ionogels. The obtained ionogels can endure an 11 000% stretch and exhibit Young's modulus and toughness of 58 MPa and 25 MJ m−3, respectively. In addition, the fracture energy is as high as 125 kJ m−2, outperforming most reported ionogels. Furthermore, the UiO-66-ionogels are fully recyclable and both the mechanical and electrical properties can be restored. The results of this work provide a new vision for the development of future “green” sensors.

Graphical abstract: Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Supplementary files

Article information

Article type
Communication
Submitted
13 7 2022
Accepted
02 9 2022
First published
05 9 2022

Mater. Horiz., 2022,9, 2881-2892

Metal–organic framework (MOF) facilitated highly stretchable and fatigue-resistant ionogels for recyclable sensors

Q. Xia, W. Li, X. Zou, S. Zheng, Z. Liu, L. Li and F. Yan, Mater. Horiz., 2022, 9, 2881 DOI: 10.1039/D2MH00880G

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