Porous ceramic-polymer hybrid for body-integrated capacitive sensing
摘要
The rapid development of fields such as smart healthcare and human‑computer interaction has created new demands for wearable flexible pressure sensors. This work presents a capacitive pressure sensor based on a flexible composite material. A flexible porous structure was constructed via a sacrificial template method, with dielectric ceramic fillers dispersed in the organic matrix to synergistically enhance the dielectric response of the sensor. The sensor exhibits a sensitivity of 64.24 kPa−1 and a response time of 57.85 ms, can resolve subtle pressure variations even under substantial static loads, and possesses a superhydrophobic surface along with long‑term cycling stability. Integrated into a neck‑worn wearable system, it successfully enables real‑time monitoring of biomechanical signals such as breathing, swallowing, and speech with high signal‑to‑noise ratios. This study provides an example for the application of dielectric ceramics in sensing fields and furthermore offers a new design concept for developing flexible sensors with high sensitivity and strong interference resistance.