Highly sensitive, wearable piezoresistive methylcellulose/chitosan@MXene aerogel sensor array for real-time monitoring of physiological signals of pilots

Sensors with enhanced biocompatibility, high sensitivity, and stable output have gained prominence with the rapid advancement of piezoresistive sensor technologies. However, conventional piezoresistive sensors struggle to balance sensitivity and output stability. Here, we fabricated synergistic methylcellulose/chitosan MXene-based (MC/CS@MXene) aerogels through physical blending and freeze-drying, emulating the hollow bamboo structure. The aerogels form synergistic interconnection via electrostatic adsorption and hydrogen bonding, endowing the aerogel-assembled resistive sensor with high sensitivity (2.90 kPa −1 ), exceptional mechanical stability (8000 compression cycles at 10 kPa), and rapid response and recovery times (119 and 91 ms, respectively). A piezoresistive sensor array based on MC/CS/@MXene shows considerable potential for human–computer interactions and wearable technologies. Furthermore, the sensor array can monitor real-time physiological signals of civil aviation pilots.