Wearable Strain Sensors with Aligned Macro Carbon Cracks Using a Two-Dimensional Triaxial-Braided Fabric Structure for Monitoring Human Health

Abstract

Recently, wearable sensors, due to their ability to exhibit characteristics, have been appealing for health monitoring through detection of human motions and vital signals. The development of strain sensors with high sensing performance and wearability has been a great challenge to date. In this study, a textile-based strain sensor with good skin affinity was fabricated through a simple fabrication process of dip-coating 2D triaxial-braided fabrics using carbon ink and then drying. The macro crack aligned on the 2D triaxial-braided fabric with a high-density structure and good recovery force. The sensitivity of textile-based strain sensor can be enhanced due to aligned macro crack formed by prestrained fabricating process and characteristic of the 2D triaxial braided fabric with high dense structure. The optimized sensor exhibits high sensitivity (gauge factor: 128) in a strain range of 0–30%, durability (5000 cycles), washability, low hysteresis, and fast response time (90 ms). Therefore, it can be applied as a wearable sensor that can monitor human motions (large strain) and biosignals (subtle strain).

Intelligent and highly sensitive strain sensor based on indium tin oxide micromesh with a high crack density

“…5c). Compared with the recently published strain sensor, 6,[21][22][23][24][25][26][27][28][29][30][31][32] especially the fabric sensor, the IMSS shows obvious advantages in the fixing method, water vapor permeability, intelligence, and GF (Fig. 5d and Table 1).…”

3D Waterproof MXene‐Based Textile Electronics for Physiology and Motion Signals Monitoring

“…Wearable flexible electronics have drawn vast attention owing to their potential applications in energy harvesting, [1,2] health monitoring, [3,4] motion detection, [5,6] human-machine interaction, [7][8][9] artificial intelligence, [10,11] and so on. In recent years, tremendous efforts have been made based on thin-film electronics with unique flexibility, high sensitivity, and fast response time.…”

Low-Temperature Wearable Strain Sensor Based on a Silver Nanowires/Graphene Composite with a Near-Zero Temperature Coefficient of Resistance

“…Wearable strain sensors that allow for the detection of various physiological signals are attracting tremendous attention, as they have widespread potential applications in human–machine interaction, electronic skins, soft robotics, and healthcare monitoring. − Among various types of wearable strain sensors (resistive, capacitive, and electric sensors), resistive sensors have been extensively investigated because of their low cost, simple fabrication process, structure adjustability and diversity, and outstanding sensing performance. − Benefiting from the rapid development of the conductive nanomaterials such as graphene (G), − carbon nanotubes (CNTs), − metal nanowires (NWs), − and MXene, − a great number of resistive strain sensors with ultrahigh sensitivity, excellent stretchability, and a broad working range have been developed. Currently, the emergence of Internet of Things (IoT) has greatly expanded the application scope of strain sensors, which are required to work all day under diverse complicated conditions, even under extreme conditions such as temperature variation, low temperatures, − high pressure, and water environment .…”