Highly Sensitive MXene Helical Yarn/Fabric Tactile Sensors Enabling Full Scale Movement Detection of Human Motions

Abstract

Textile‐based wearable electronics combined with nanomaterials are ideal devices that have good electrical and thermal conductivity, and flexibility. With a metal conductivity and metalloid flexibility, 2D titanium carbide MXene is excellent enough for producing intelligent textiles. Here, a wrapping forming method is provided to fabricate MXene textile strain (MTS) sensors with high gauge factor (GF) of 715.94 as high as strain of 200%. Periodic cycling indicated that the MTS wrapped yarn is stable, which can track changes of facial expressions precisely as the small deformation. Weaving MTS yarns into fabric as glove and sensing belt can recognize sign language and record middle and large motions of human body, respectively. On the other hand, walking postures and electric heating are accurately detected by coating MXene dispersions on elastic and breathable spacer fabric as piezoresistive insoles, which is especially beneficial to the elderly and patients with foot diseases. Therefore, a unique strategy is proposed for full scale human motions monitoring by fabricating MXene helical yarns served as sensitive strain sensors, weft rib fabric that detected the in‐plane deformations and spacer fabric piezoresistive insole behaved as pressure sensors to monitor the step patterns so that suiting for wearable versatile sensing system.

A multifunctional flexible strain sensor based on an excellent sensing performance PDMS-MXene@CNT/TPU nanofiber membrane with hydrophobic and photothermal conversion performance

“…4f). 16,[41][42][43][44][45][46][47][48] Moreover, the flexible strain sensor based on the MXene@CNT/TPU nanofiber membrane exhibits good stability, as shown in (Fig. 4g).…”

Multifunctional Wearable Device Based on an Antibacterial and Hydrophobic Silver Nanoparticles/Ti3C2Tx MXene/Thermoplastic Polyurethane Fibrous Membrane for Electromagnetic Shielding and Strain Sensing

“…To date, flexible and wearable electronic devices with sensing properties have been developed rapidly, and they hold considerable potential for human motion detection, , human–computer interaction, − and health management. , However, the increasing electromagnetic (EM) radiation pollution is causing a serious impact on the functionality of these devices. − Therefore, flexible wearable devices with efficient EMI shielding properties are in urgent demand. Furthermore, considering the skin-friendliness and long-term wearability of wearable electronic devices, appropriate antibacterial properties and hydrophobicity are seen as essential properties that need to be achieved.…”

Dual-Stage Surficial Microstructure to Enhance the Sensitivity of MXene Pressure Sensors for Human Physiological Signal Acquisition

“…With the rapid rise of artificial intelligence and Internet of Things technology, flexible wearable sensors have drawn extensive research enthusiasm in recent years, and they can be widely applied in human–machine interface applications, health management, smart robots, and so forth. − Flexible pressure sensors can intuitively detect and reflect complex human physiological and posture signals by effectively converting mechanical signals into electrical signals with material deformation versus external pressure, which show great commercial value in medical facilities for disease diagnosis and health care. At present, flexible pressure sensors are mainly divided into piezoresistive sensors, − piezoelectric sensors, − and capacitive sensors. ,− Compared to the other two types of sensors, the piezoresistive sensor shares several advantages of simple device structure, low manufacturing cost, etc. Over the past few years, a variety of advanced materials and structures have been proposed and employed to enhance the comprehensive sensing properties of flexible piezoresistive sensors.…”