A Reprocessable Dynamic Disulfide Hydrogel for Capacitive Pressure Sensors

With the rapidly growing demand for wearable sensor devices across a range of applications, sensing technology has been rapidly advancing. However, challenges such as limited sensitivity, device instability, and trade‐offs between performance and recyclability remain unaddressed. We report the facile fabrication of a recyclable dynamic disulfide hydrogel from an amphiphilic polyethylene‐glycol‐based thioctic acid derivative with hydrophilic/hydrophobic characteristics. The hydrogel demonstrates decent thermal stability and adequate mechanical properties, including elasticity, compressibility, and reprocessing capability. It is also integrated into a microstructured capacitive sensor, demonstrating a sensitivity of up to 1.14 kPa‐1, rapid response times within 20 ms, and robust functioning stability up to 400 consecutive cycles. These properties make it particularly intriguing for the sustainable development of high‐performance wearable sensors.