A Self‐Healing Conductive PVP/SUM Hydrogel for Real‐Time Human Motion Detection

ABSTRACT Hydrogel based stress‐strain sensors have been given significant attention due to their potential in developing wearable electronic devices and health‐monitoring systems, owing to their intrinsic softness and mechanical flexibility. Hence, this study aims to develop a hydrogel with self‐healing properties, conductivity, and good mechanical performance, which is essential for accurate data analysis and measurements. A composite hydrogel based on polyvinyl pyrrolidine (PVP) and sunitinib malate (SUM) was successfully prepared. The PVP/SUM hydrogel formed H‐bonds and dipole‐dipole bonds, which exhibited good mechanical properties, rapid self‐healing, and sensing properties. It showed mechanical elongation up to 190 mm. Furthermore, PVP/SUM hydrogel developed a conductive network within the hydrogel, improving its conductivity from 3.28 × 10 −5 S/cm. The hydrogel's sensing test showed quick response times when used as a soft human motion sensor, effectively enabling real‐time monitoring of both large‐scale and delicate human physiological stress activities, including joint movements in the neck, wrist, elbow, and forefinger.