Highly stretchable and sensitive strain sensor based on Ti3C2-coated electrospinning TPU film for human motion detection

With the rapid development of wearable devices, highly sensitive strain sensors with superior flexibility and conductivity are in urgent demand. In this study, a novel 2D and graphene-like material Ti3C2 with excellent electron and ion transmission rates was utilized to decorate electrospinning thermoplastic urethane (ETPU) film for assembling a stretchable strain sensor. The developed ETPU/Ti3C2 sensor exhibits a gauge factor of 2500 kPa−1 in high strain range from 250% to 300%, and 5.2 when the strain <50%, good durability and stability (stretch/release test of 1000 cycles), as well as the distinguishment of various frequencies and strains. Combined with high performance and stable structure, the sensor could be attached on skin or cloths to monitor both subtle and large-scale human motions, such as joint bending and pronunciation. The results demonstrate that the strain sensor has a promising application prospect in artificial skin and wearable health-care electronics.