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Highly Stretchable and Transparent Double-Network Hydrogel Ionic Conductors as Flexible Thermal–Mechanical Dual Sensors and Electroluminescent Devices
Abstract
The latest generation flexible devices feature materials that are conductive, highly stretchable, and transparent to meet the requirements of a reliable performance. However, the existing conductors are mostly electronic conductors, which cannot satisfy these high-performance challenges. A robust hydrogel ionic conductor was rapidly fabricated with a facile one-pot approach by employing bioinspired agar with a physically cross-linked network, polyacrylamide (PAM) with a photoinitiated cross-linked network under appropriate UV intensity, and Li + as conductive ions. The resulting Li + /agar/PAM ionic double-network hydrogels could be fabricated into various shapes through injection. The unique ionic hydrogel showed a remarkable stretchability with over 1600% extension, high tension/compression strength (0.22 MPa/3.5 MPa), and toughness (2.2 MJ/m 3 ). Furthermore, it was demonstrated to possess dual sensory capabilities through the combination of both temperature and mechanical deformation. This hydrogel ionic conductor exhibited high stretching sensitivity with a gauge factor of 1.8 at strain 1100% and bending sensitivity in a broad angle range of 30–150°, respectively. Such highly optical transparency and elasticity endow the hydrogel-phosphor composites with promising luminescent properties. The multifunctional ionic hydrogel can be used as soft conductors for application in flexible devices such as ionic skin for wearable sensors and luminescence display.
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Cited by
Wei, Y., Wang, H., Ding, Q., Wu, Z., Zhang, H., Tao, K., Xie, X., & Wu, J. (2022) · Materials Horizons · doi:10.1039/d2mh00284a · Cited by 66
Metadata
- Authors
- Yang, B., & Yuan, W.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-04-15
- Volume
- 11
- Issue
- 18
- Pages
- 16765-16775
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2939059089
- Cited by
- 325
- References
- 41
- FWCI
- 15.26
- Type
- journal article
- Language
- en
- Open access
- closed
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