Highly Sensitive Flexible Capacitive Pressure Sensor with Porous Hierarchical Structure Realized by a Microwave Curing Method

• DOI: 10.1002/adem.202301412
• Publication Date: 2023-11-11T02:35:22Z
• Authors: Rui Ma; Yilin Zhao; Haobing Chen; Ziran Zeng; Yunfan Li; Ruiyuan Wang; Feng Liu
• Keywords: Polydimethylsiloxane

The introduction of porous hierarchical microstructures effectively improves the sensitivity flexible pressure sensors. However, it is difficult to achieve for sensors through inexpensive, efficient, and simple preparation methods. Herein, a hemispherical array with microstructure prepared on polydimethylsiloxane substrate using one‐step microwave curing process glucose as porogen. Furthermore, electrode based combined an ionic liquid polymeric gel membrane obtain capacitive sensor. Thanks deformability double‐dielectric layer effect membrane, sensor displays ultrahigh 131.21 kPa −1 within 0–1 kPa. Meanwhile, has short response time, excellent dynamic loading stability, well long‐term stability (>3000 cycles). In application testing, monitors various physiological activities like pulse, breathe, speech, swallowing, demonstrating its good prospects in field health electronics. Most importantly, proposed method can realize structure process, which offers fresh way economical, green, efficient high‐sensitivity