Citation: Zhaoyu Liu, Dan Wang, Guohui Liu, Huili Zhang, He Li, Xiaoju Li, Ruihu Wang. Sound-Bioinspired Dual-Conductive Hydrogel Sensors for High Sensitivity and Environmental Weatherability[J]. Chinese Journal of Structural Chemistry, ;2025, 44(8): 100628. doi: 10.1016/j.cjsc.2025.100628 shu

Sound-Bioinspired Dual-Conductive Hydrogel Sensors for High Sensitivity and Environmental Weatherability

Wearable sensors represent a promising technology to monitor human health and movement, however, it is pivotal and challenging to tailor-make highly conductive hydrogels to achieve high sensitivity and environmental weatherability for application at extreme temperature conditions. Herein, the dual-conductive hydrogels consisting of ion-conductive deep eutectic solvents (DES) and electron-conductive MXene within polymer matrix have been presented. The increment of ion and electron migration path could generate substantial resistance variation and thus improves the sensitivity of hydrogels under small strain and large strain, resembling those in low and high frequency sound discrimination of auditory transduction. Additionally, the hydrogen bonding interactions among water molecules, DES and MXene as well as polymers endow the hydrogels with superior anti-freezing and water-retaining performance. The resultant hydrogel sensor achieves ultra-fast strain response time of 0.01 s and high sensitivity over 1.0 in wide strain ranges from 1% to 150%. High sensitivity, anti-freezing and water-retaining performance enable the hydrogels to monitor strain at extreme temperature conditions from −20 to 60 °C and could detect human motion in real time. This work provides a rational approach to the construction of high-sensitivity and environmental weatherable hydrogels based on the dual-conductive fillers for the development of advanced wearable sensors.
- Polymers,
- Sensors,
- Hydrogels,
- MXene,
- Deep eutectic solvents
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