A Double-Layer Polyurethane Electrospun Membrane with Directional Sweat Transport Ability for Use as a Soft Strain Sensor

• DOI: 10.1021/acsami.4c10854
• Publication Date: 2024-09-04T11:36:00Z
• Authors: Gaopeng Wang; Zeming Xie; Wenli Yu; Shihua Mao; Shuaibing Wang; Si Yu Zheng; Jintao Yang
• Keywords: Strain (injury); SIGNAL (programming language)

Wearable electronics for long-term monitoring of physiological signals should be capable removing sweat generated during daily motion, which significantly impacts signal stability, human comfort, and safety the electronics. In this study, we developed a double-layer polyurethane (PU) membrane with sweat-directional transport ability that can applied strain signals. The PU was composed hydrophilic, conductive layer relatively hydrophobic layer. composite exhibited varied pore size opposite hydrophilicity on its two sides, enabling spontaneous pumping from side to hydrophilic side, i.e., directional sweat. used as sensor monitor motion over broad working range 0% 250% high sensitivity (GF = 4.11). also detect simple movements even under sweating conditions. We believe strategy demonstrated here will provide new insights into design next-generation sensors.