Wide-range linear viscoelastic hydrogels with high mechanical properties and their applications in quantifiable stress-strain sensors

Multifunctional Self-Healing Dual Network Hydrogels Constructed via Host–Guest Interaction and Dynamic Covalent Bond as Wearable Strain Sensors for Monitoring Human and Organ Motions

“…Hydrogels are a kind of intelligent and biocompatible soft matter formed by hydrophilic three-dimensional networks, and can absorb a large amount of water without structural damage. Hydrogels can be endowed with good mechanical capability, self-healing performance, and conductivity and have emerged as promising candidates for flexible and wearable strain sensors. − Since Gong et al created the first DN hydrogels using two-step free radical polymerizations in 2003, DN hydrogels have gained more and more attention because of their excellent mechanical performance and dynamic adjustable features. DN hydrogels generally consist of two interpenetrating cross-linked networks, which achieves a balance between high strength and toughness by adjusting intramolecular or intermolecular interactions and the structure of the two networks. − DN hydrogels have been developed into intelligent soft materials with excellent and adjustable mechanical properties.…”

A self-healing water-dissolvable and stretchable cellulose-hydrogel for strain sensor

“…6c). The drawn curve had excellent regularity, stable baseline and the reproducibility (Ma et al 2020). It is worth noting that the self-adhesive and low modulus properties of DESstrain sensors made strain detection and physiological signal monitoring easier and more accurate.…”

“…The ion-conducting organic hydrogel system has high sensitivity against tensile or compressive stress stimulation, and the constructed multifunctional sensor device has the potential for wide application in human motion monitoring (Ahuja et al 2020;Morandeira et al 2017;Xu et al 2021;Yan et al 2020). As a soft human motion sensor, hydrogel can accurately detect large and small-scale human activities in real time (Liu et al 2018;Ma et al 2020). In addition, excellent self-healing wearable device can repair physical damage caused by repeated bending and stretching, which increases the durability in practical applications (Guo et al 2019;Lin et al 2020).…”

Preparation and Swelling Behaviors of High-Strength Hemicellulose-g-Polydopamine Composite Hydrogels

“…The compression properties of hydrogel was measured using an electronic universal material testing machine (Instron Inc., Boston, MA, USA) [ 26 ]. The sample was compressed at a rate of 3 mm·min −1 until the compression rate reached 90%.…”