Intrinsically adhesive, conductive organohydrogel with high stretchable, moisture retention, anti-freezing and healable properties for monitoring of human motions and electrocardiogram

Li, Jiajia; Ge, Sijia; Niu, Yanfang; Liu, Shinian; Geng, Jian; Tian, Leirong; Xu, Min; Shi, Yu; Cui, Xingran; Jia, Ru; Gu, Zhongze; Xu, Hua

doi:10.1016/j.snb.2022.133098

Cited by 5 publications

(2 citation statements)

References 52 publications

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“…This hydrogel can be fabricated into integrated strain sensors with both piezoresistive and capacitive properties, responding sensitively to minute pressure changes of the human body, showing great potential in the field of flexible sensors. Xu et al [63] developed a novel self-adhesive conductive organic hydrogel without catechol adhesion components by covalently crosslinking acrylamide, N-isopropylacrylamide, and reduced graphene oxide, followed by immersion in an ethylene glycol-water mixture. This hydrogel exhibits long-lasting moisturization (~30 days), extreme temperature resistance (−20-60 • C), stable conductivity, excellent stretchability (~1700%), high compressive stress (~5 MPa), and high strain sensitivity (gauge coefficient of 3.12), making it suitable for the long-term, continuous monitoring of human movements and electrocardiograms.…”

Section: Carbon Nanomaterial-based Composite Hydrogelsmentioning

confidence: 99%

Progress of Research on Conductive Hydrogels in Flexible Wearable Sensors

Cao,

Wu,

Yuan

et al. 2024

Gels

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Conductive hydrogels, characterized by their excellent conductivity and flexibility, have attracted widespread attention and research in the field of flexible wearable sensors. This paper reviews the application progress, related challenges, and future prospects of conductive hydrogels in flexible wearable sensors. Initially, the basic properties and classifications of conductive hydrogels are introduced. Subsequently, this paper discusses in detail the specific applications of conductive hydrogels in different sensor applications, such as motion detection, medical diagnostics, electronic skin, and human–computer interactions. Finally, the application prospects and challenges are summarized. Overall, the exceptional performance and multifunctionality of conductive hydrogels make them one of the most important materials for future wearable technologies. However, further research and innovation are needed to overcome the challenges faced and to realize the wider application of conductive hydrogels in flexible sensors.

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Section: Carbon Nanomaterial-based Composite Hydrogelsmentioning

confidence: 99%

Progress of Research on Conductive Hydrogels in Flexible Wearable Sensors

Cao,

Wu,

Yuan

et al. 2024

Gels

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show abstract

“…A large number of polar amino, imino, and carbonyl functional groups can easily form multiple hydrogen bonds with O, N, and F components of the substrate surface for adhesion. [36,37] Moreover, the carbonyl group and disulfide bonds can form metal coordination bonds with metal ions on the substrate surface for the adhesion. [34,35,38] Due to the relative saturation of other dynamic chemical bonds in the PNAGA/PNIPAm/AgNW hydrogels, we speculated that the presence of a large number of exposed hydrogen bonds is the main reason for the gel's adhesion.…”

Section: The Adhesion Of Pnaga/pnipam/agnw Hydrogelmentioning

confidence: 99%

A Skin‐Inspired Multifunctional Conductive Hydrogel with High Stretchable, Adhesive, Healable, and Decomposable Properties for Highly Sensitive Dual‐Sensing of Temperature and Strain

Ge,

Liu,

et al. 2023

Small Methods

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Developing smart hydrogels with excellent physicochemical properties and multi‐sensing capabilities for various simulation of human skin's functions still remains a great challenge. Here, based on simple and convenient one‐step covalent cross‐linking method enhanced by dynamic RS‐Ag interactions, a skin‐inspired multifunctional conductive hydrogel with desirable physicochemical properties (including high stretchability, self‐adhesion, self‐healing, decomposition and removability) is developed for highly sensitive dual‐sensing of temperature and strain. Benefiting from the synergistic action of multiple hydrogen bonds, RS‐Ag bonds and S‐S bonds, the gel exhibited a novel thermosensitive mechanism. The prepared hydrogels exhibited extremely high mechanical properties (maximum tensile strength of 0.35 MPa, elongation at break nearly 1800%, compressive stress over 4.43 MPa), excellent self‐healing (96.82% (stress), 88.45% (temperature), 73.89% (mechanical property)), decomposition (the molecular weight after decomposition is below 700) and self‐adhesion (enhanced contact with the material interface). In addition, this conductive hydrogel could also simultaneously achieve highly sensitive temperature‐sensing (TCR: 10.89) and stress‐sensing (GF: 1.469). As a proof‐to‐concept, the hydrogel displayed superior capability for simulation of human skin to perception of touch, pressure and ambient temperature simultaneously, indicating promising applications in the fields of wearable devices, personal health care, and human‐machine interfaces.

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Fast gelling, high performance MXene hydrogels for wearable sensors

Zhang,

Guo,

et al. 2024

Journal of Colloid and Interface Science

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Intrinsically adhesive, conductive organohydrogel with high stretchable, moisture retention, anti-freezing and healable properties for monitoring of human motions and electrocardiogram

Cited by 5 publications

References 52 publications

Progress of Research on Conductive Hydrogels in Flexible Wearable Sensors

Progress of Research on Conductive Hydrogels in Flexible Wearable Sensors

A Skin‐Inspired Multifunctional Conductive Hydrogel with High Stretchable, Adhesive, Healable, and Decomposable Properties for Highly Sensitive Dual‐Sensing of Temperature and Strain

Fast gelling, high performance MXene hydrogels for wearable sensors

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