Self-healing, self-adhesive, stretchable and flexible conductive hydrogels for high-performance strain sensors

Abstract

Conductive hydrogels have been widely studied for the potential application as wearable sensors due to their flexibility and biocompatibility. However, the simultaneous incorporation of excellent stretchability, toughness, conductivity, self-healing, and...

Ultra-stretchable, fast self-healing, adhesive, and strain-sensitive wearable sensors based on ionic conductive hydrogels

“…The self-adhesion of wearable hydrogel-based sensors is desirable in monitoring human motions for good fit and for monitoring various strains accurately while reducing the discomfort of wearing them. 60,61 The self-adhesion of the resultant hydrogel sensor on various substrates with different properties was investigated, as shown in Fig. 4a.…”

High-performance flexible strain sensors based on silver film wrinkles modulated by liquid PDMS substrates

“…[5][6][7][8][9][10] As an important component of the wearable system, exible strain sensors have been the main research direction for the development of future intelligent devices. [11][12][13][14][15][16][17][18] The exible strain sensors can be realized by depositing or coating functional units such as metal lms, [19][20][21][22] conducting polymers, 10,13,15 and two-dimensional materials 23,24 on so substrates. Due to the exibility, bendability and stretchability of the so substrates, the sensors can well t to the non-planar human skins or other curved surfaces.…”

“…5–10 As an important component of the wearable system, flexible strain sensors have been the main research direction for the development of future intelligent devices. 11–18…”

“…The flexible strain sensors can be realized by depositing or coating functional units such as metal films, 19–22 conducting polymers, 10,13,15 and two-dimensional materials 23,24 on soft substrates. Due to the flexibility, bendability and stretchability of the soft substrates, the sensors can well fit to the non-planar human skins or other curved surfaces.…”

Fully Physically Crosslinked Conductive Hydrogel with Ultrastretchability, Transparency, and Self-Healing Properties for Strain Sensors

“…Compared to the above conductive hydrogels, ionic conductive hydrogels, by introducing inorganic salt ions (e.g., LiCl, KCl, NaCl, Fe 3+ , Ca 2+ , etc.) into the hydrogels, are more popular, owing to their intrinsic transparency [18][19][20]. For instance, Zhu et al constructed an ionized polyacrylamide (PAAm)-carboxymethyl chitosan (CMCS)-LiCl hydrogel-based strain sensor with transparency [21].…”