A high-pressure resistant ternary network hydrogel based flexible strain sensor with a uniaxially oriented porous structure toward gait detection

Abstract

The interaction between triple networks in hydrogel and the flexible sensor prepared are applied to gait detection.

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

“…14,15 Due to water loss brought on by crystallization at low temperatures and air drying, the material characteristics of hydrogels may deteriorate, making them damaged, brittle, and non-conductive. These adverse changes may lead to the failure of hydrogel in strain sensors, 16,17 nanogenerators, 18,19 and supercapacitors 20,21 under harsh conditions. Thus, a hydrogel strain sensor with strong adhesion, frost resistance, and water loss resistance is absolutely important.…”

“…Through dual-network hydrogels, − nanocomposite hydrogels, , macromolecular microsphere hydrogels, − and other strategies, the hydrogel strain sensor has high strength, high toughness, , high tensile property, and self-adhesion. , Due to water loss brought on by crystallization at low temperatures and air drying, the material characteristics of hydrogels may deteriorate, making them damaged, brittle, and non-conductive. These adverse changes may lead to the failure of hydrogel in strain sensors, , nanogenerators, , and supercapacitors , under harsh conditions. Thus, a hydrogel strain sensor with strong adhesion, frost resistance, and water loss resistance is absolutely important.…”

Triple-Responsive, Multimodal, Visual Electronic Skin toward All-in-One Health Management for Gestational Diabetes Mellitus

“…Therefore, the signal was efficiently distinguished by analyzing the shape of the relative resistance variation curve. 65,66 The hydrogel sensor was found with a sensitive response (0.1 s) and recovery (0.1 s) time from Figure 6e. In Figure 6a 2 , the monitoring results of the cutting− healing hydrogel sensor were highly consistent with those results from the hydrogel uncut, proving that the hydrogel sensor had remarkable perception of human motion and could quickly heal even when it encountered serious external damage.…”

Robust hydrogel sensor with good mechanical properties, conductivity, anti-swelling ability, water tolerance and biocompatibility

“…9,10 The conductivity of the conductive hydrogels is achieved via introducing conductive additives into the hydrogels. 11 Typical conductive additives are mainly divided into four classes: nano-scaled metal additives (gold nanowire, 12 silver nanowire, 13,14 eutectic liquid gallium and indium 15 ), nano-scaled carbon conductors (single-/multi-walled carbon nanotubes, 16,17 graphene, 18 MXene, 19 carbon dots 20 ), conductive polymers ( polyaniline, 21,22 polythiophene, 23 and PEDOT:PSS 24 ), and inorganic salts. [25][26][27][28] However, several issues still exist and need to be solved for bridging the gap from hydrogel research to specific practical applications.…”

“…and the addition of toxic crosslinkers and contain unevenly distributed conductive polymers. [21][22][23][24] Although the conductive polymer PEDOT:PSS can endow the hydrogel with electrical conductivity, improved mechanical properties and biocompatibility, the manufacturing of this hydrogel in large quantities remains elusive due to its high price. 25 Third, when using inorganic salts as conductors, the hydrogels are often made conductive by immersing freeze-dried hydrogels in inorganic salt solutions.…”