A bio-inspired, ultra-tough, high-sensitivity, and anti-swelling conductive hydrogel strain sensor for motion detection and information transmission

Di, Xiang; Hou, Jiawen; Yang, Mingming; Wu, Guolin; Sun, Pingchuan

doi:10.1039/d2mh00456a

Cited by 69 publications

(44 citation statements)

References 55 publications

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“…177,200 Additionally, the skin-like hydrogel absorbs too much sweat, causing the skin-like hydrogel to expand and not adhere to the body. 115,201 Hence, how to control the ability of skin-like hydrogels to absorb sweat is of great significance to ensure the application of skin-like hydrogel for monitoring sweat. Di et al designed and prepared a skin-like hydrogel with high toughness and anti-swelling.…”

Section: Biochemical Sensingmentioning

confidence: 99%

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Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

Wang

Zhao

et al. 2023

J. Mater. Chem. C

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Section: Biochemical Sensingmentioning

confidence: 99%

“…So, after absorbing enough sweat, the skin-like hydrogel will not leave the body easily. 201 So, biochemical sensing can be roughly divided into wound monitoring and human sweat monitoring. The urgent need of wound condition and human health monitoring is met through the biochemical sensing of skin-like hydrogel.…”

Section: Biochemical Sensingmentioning

confidence: 99%

Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

Wang

Zhao

et al. 2023

J. Mater. Chem. C

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“…In the case of a sign language transmission system, these shortcomings can decrease the sensitivity, distort translation, and even reduce user comfort. Therefore, the development of adhesive hydrogels based on molecular structure biomimetics is a key approach to addressing the current limitations . Recent research on self-adhesive hydrogels has mainly focused on catechol and its derivatives. , Liao et al prepared a healable, adhesive, and wearable hybrid hydrogel framework for ultrasensitive human-computer interaction and healthcare monitoring using a dynamic supramolecular cross-linking between functionalized single-walled carbon nanotubes, poly(vinyl alcohol), and mussel-inspired polydopamine .…”

Section: Introductionmentioning

confidence: 99%

Bio-Inspired Homogeneous Conductive Hydrogel with Flexibility and Adhesiveness for Information Transmission and Sign Language Recognition

Wang

Hsu

et al. 2023

ACS Appl. Mater. Interfaces

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The wearable electronic technique is increasingly becoming an effective approach to overcoming the communication obstacles between signers and non-signers. However, the efficacy of conducting hydrogels currently proposed as flexible sensor devices is hindered by their poor processability and matrix mismatch, which frequently results in adhesion failure at the combined interfaces and deterioration of mechanical and electrochemical performance. Herein, we propose a hydrogel composed of a rigid matrix in which the hydrophobic and aggregated polyaniline was homogeneously embedded, while quaternate-functionalized nucleobase moieties endowed the flexible network with adhesiveness. Accordingly, the resulting hydrogel with chitosan-graf tpolyaniline (chi-g-PANI) copolymers exhibited a promising conductivity (4.8 S• m −1 ) because of the uniformly dispersed polyaniline components and a high strain strength (0.84 MPa) because of the chain entanglement of chitosan after soaking. In addition, the modified adenine molecules not only realized synchronization in improving the stretchability (up to 1303%) and exhibiting a skin-like elastic modulus (≈184 kPa), but also provided a durable interfacial contact with various materials. The hydrogel was further fabricated into a strain-monitoring sensor for information encryption and sign language transmission based on its sensing stability and strain sensitivity of up to 2.77. The developed wearable sign language interpreting system provides an innovative strategy to assist auditory or speech-impaired people in communicating with non-signers using visual−gestural patterns including body movements and facial expressions.

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“…Conductive hydrogels, as an emerging soft material with flexibility, electrical conductivity, and biocompatibility, are promising candidate materials for human motion detection sensors. − However, traditional conductive hydrogel surfaces generally lack adhesion, and auxiliary adhesives are required to fix the hydrogels on human skin when employed as flexible sensors. The auxiliary adhesives often have a high interfacial resistance, which significantly reduces the detection accuracy and precision of the sensors. − Therefore, designing and preparing self-adhesive hydrogels is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Adhesive and Carbon Fiber Conductive Hydrogel for Flexible Sensors

Huang

Tang

Zhu

et al. 2023

ACS Appl. Polym. Mater.

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Conductive hydrogels, which are considered to be a promising material for human motion detection sensors, often display low flexibility, limited elongation, and non-adhesive properties. Herein, a multifunctional hydrogel with self-adhesive, highly stretchable, and conductive properties was developed by introducing polydopamine (DA) and carbon fiber (CF) into polyacrylamide (PAAm) hydrogel. The DA was polymerized with oxygen to form polydopamine (PDA), and the PDA-CF-PAAm hydrogel was hybrid-crosslinked with covalent bonds and recoverable non-covalent bonds including hydrogen bonds and π-π stacking. Therefore, the prepared PDA-CF-PAAm hydrogel exhibits high and reversible stretchability. Additionally, the hydrogel demonstrates high adhesiveness on various substrate surfaces, such as paper, glass, rubber, and biological tissue surfaces due to the catechol groups of PDA. Furthermore, the obtained PDA-CF-PAAm hydrogel is conductive because of the addition of CF. As a result, the self-adhesive, highly stretchable, and conductive PDA-CF-PAAm hydrogel can be directly adhered to the skin as a strain sensor to monitor human body motion. This work may expand the scope of multifunctional hydrogel preparation for flexible wearable devices.

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A bio-inspired, ultra-tough, high-sensitivity, and anti-swelling conductive hydrogel strain sensor for motion detection and information transmission

Abstract: Conductive hydrogels are excellent candidates for the next-generation wearable materials and are being extensively investigated for their potential use in health monitoring devices, human–machine interfaces, and other fields. However, their...

Cited by 69 publications

References 55 publications

Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

Skin-like hydrogels: design strategy and mechanism, properties, and sensing applications

Bio-Inspired Homogeneous Conductive Hydrogel with Flexibility and Adhesiveness for Information Transmission and Sign Language Recognition

Mussel-Inspired Adhesive and Carbon Fiber Conductive Hydrogel for Flexible Sensors

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