MXene-based double-network organohydrogel with excellent stretchability, high toughness, anti-drying and wide sensing linearity for strain sensor

High-Strength, Freeze-Resistant, Recyclable, and Biodegradable Polyvinyl Alcohol/Glycol/Wheat Protein Complex Organohydrogel for Wearable Sensing Devices

“…Excellent mechanical properties are beneficial to expanding the application fields of hydrogels. , Under the synergistic effect of PVA, WP, EG, and LiCl, the prepared PEW organohydrogels exhibited excellent mechanical properties. As shown in Figure a, the PEW organohydrogel could be stretched to more than three times its initial state, and as also depicted in Figure b­(i–iii), the PEW organohydrogel could be twisted and knotted to withstand a weight of 500 g without breaking, which proves its good mechanical properties.…”

A review related to MXene preparation and its sensor arrays of electronic skins

“…Huang et al introduced glycerol into the MXene-PAM/SA-Ca 2+ double network (DN) organohydrogel resulting in good anti-drying and anti-freezing properties. 116 This gel can be stored at −20 °C for 24 hours and still had a stable signal. Its high toughness (3.8 MJ m −3 ), excellent stretchability (1170%), and robust breaking strength (540 kPa) enable it to successfully monitor human motion.…”

Ultrathin Cellulose Nanofiber-Reinforced Ti3C2Tx-Crosslinked Hydrogel for Multifunctional and Sensitive Sensors

“…With the substantial development of electronic skins and personalized healthcare monitoring technologies, the use of wearable strain sensors has received tremendous attention. − As one of the emerging materials, conductive hydrogels have been widely investigated for the preparation of flexible wearable strain sensors , due to their excellent stress–strain adaptability, , tunable mechanical properties, and remarkable biological characteristics. , Nowadays, hydrogel materials used in strain sensing are increasingly required to meet the diversity of the function, such as a quick and reliable real-time signal response with high and stable conductivity, ability to work efficiently under various conditions, high mechanical performance, strong adhesion to different substrates, and being easily manipulated. , Unfortunately, many of the hydrogel-based sensors available today (such as ionic gels, organogels, and composite hydrogels containing conductive nanomaterials) , are unable to adequately satisfy all the requirements listed above. Previous hydrogel systems had some drawbacks, such as poor structural stability, limited mechanical strength and elasticity, unconformable interaction with skin, and a significantly reduced service life.…”

“…10,11 Nowadays, hydrogel materials used in strain sensing are increasingly required to meet the diversity of the function, such as a quick and reliable real-time signal response with high and stable conductivity, ability to work efficiently under various conditions, high mechanical performance, strong adhesion to different substrates, and being easily manipulated. 12,13 Unfortunately, many of the hydrogelbased sensors available today (such as ionic gels, organogels, and composite hydrogels containing conductive nanomaterials) 14,15 are unable to adequately satisfy all the requirements listed above. Previous hydrogel systems had some drawbacks, such as poor structural stability, limited mechanical strength and elasticity, unconformable interaction with skin, and a significantly reduced service life.…”