2024-03-27

Multi-Layer Polyurethane-Fiber-Prepared Entangled StrainSensor with Tunable

Sensitivity and Working Range for HumanMotion Detection

The entanglement of ffbers can form physical and topological structures, with the resultingbending and stretching strains causing localized changes in pressure. In this study, a multi-layerpolyurethane-ffber-prepared (MPF) sensor was developed by coating the CNT/PU sensing layer onthe outside of an elastic electrode through a wet-fflm method. The entangled topology of two MPFswas utilized to convert the st

retching strain intolocalized pressure at the contact area, enabling theperception of stretching strain. The

inffuence of coating mechanical properties and surface structureon strain sensing performance was investigated. A force regulator was introduced to regulate themechanical properties of the entangled topology of MPF. By modifying the thickness and lengthproportion of the force regulator, the sensitivity factor and sensitivity range of the sensor could becontrolled, achieving a high sensitivity factor of up to 127.74 and a sensitivity range of up to 58%.Eight sensors were integrated into a sensor array and integrated into a dance costume, successfullymonitoring the multi-axis motion of the dancer’s lumbar spine. This provides a

new approach forwearable biomechanical sensors.

Zhong W, Wang D, Ke Y, et al. Multi-Layer Polyurethane-Fiber-Prepared Entangled Strain Sensor with Tunable Sensitivity and

Working Range for Human Motion Detection[J]. Polymers, 2024, 16(8): 1023.