PDMS/Ag/Mxene/Polyurethane Conductive Yarn as a Highly Reliable and Stretchable Strain Sensor for Human Motion Monitoring

Abstract

The conductivity and sensing stability of yarn-based strain sensors are still challenges when it comes to practical applications. To address these challenges, surface engineering of polyurethane (PU) yarn was introduced to improve its surface hydrophilicity for better deposition of MXene nanosheets in its dispersion. The introduction of Ag nanoparticles via magnetron sputtering greatly improved the surface conductivity; meanwhile, the encapsulation of the PDMS protective layer effectively enhanced the sensing stability over 15,000 cycling process, as well as the working range with a gauge factor value over 700 under a strain range of 150–300%. Moreover, the exploration of its applications in human motion monitoring indicate that the prepared strain-sensing yarn shows great potential in detecting both tiny motions or large-scale movements of the human body, which will be suitable for further development into multifunctional smart wearable sensors or metaverse applications in the future.

Flexible Strain Sensor Based on Nickel Microparticles/Carbon Black Microspheres/Polydimethylsiloxane Conductive Composites for Human Motion Detection

“…(g) Resistance changes of the DFFS under cyclic tensile strain (10–60%). (h) Comparison of performance parameters. − …”

“…Figure S8 shows the DFFS stretching images for different strains (0–70%). Especially, Figure h exhibits that the DFFS has high sensitivity and high tensile properties. − Table S1 shows the technology and sensing response, and a comparison of the parameters of the DFFS is provided in Table S2.…”

High Linearity, Low Hysteresis Ti3C2Tx MXene/AgNW/Liquid Metal Self‐Healing Strain Sensor Modulated by Dynamic Disulfide and Hydrogen Bonds

“…f) Literature comparison on stretchability and hysteresis of strain sensors in recent years. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] SEM images of the MAL strain sensor (Figure 3g,h) show that the AgNWs lapped the Ti 3 C 2 T x MXene sheets between the layers and the LM acted as a bridge to increase the connection between the Ti 3 C 2 T x MXene and AgNWs. The cross-section SEM image of the self-healing strain sensor with buckled structure can be seen in Figure 3i.…”