Stretchable, self-healing, biocompatible, and durable ionogel for continuous wearable strain and physiological signal monitoring

Le, Katherine; Sun, Xia; Chen, Junjie; John, Johnson V.; Servati, Amir; Heidari, Hassan; Khademhosseini, Ali; Ko, Frank; Jiang, Feng; Servati, Peyman

doi:10.1016/j.cej.2023.144675

Cited by 20 publications

(3 citation statements)

References 47 publications

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“…Gel-like materials based on ionic conductivity can convert external stimuli into electrical signals, which has attracted wide attention in the fields of wearable devices, biopotential recording, electrochemical sensing, and implantable devices. − Compared with traditional hydrogels, the viscosity is low, easy to damage, and easy to lose water and dry. , MAIG’s robustness, environmental stability, and adhesion demonstrate its potential in the field of strain sensors. Ultimately, we assembled MAIG with commercial VHB tape to create a strain sensor (Figure a and Figure S8) to evaluate its effectiveness in monitoring body movements.…”

Section: Resultsmentioning

confidence: 99%

“…53−58 Compared with traditional hydrogels, the viscosity is low, easy to damage, and easy to lose water and dry. 59,60 MAIG's robustness, environmental stability, and adhesion demonstrate its potential in the field of strain sensors. Ultimately, we assembled MAIG with commercial VHB tape to create a strain sensor (Figure 6a and Figure S8) to evaluate its effectiveness in monitoring body movements.…”

Section: First Two Kinds Of Ils With the Same Hydrophobic Anion That ...mentioning

confidence: 99%

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A Tough and Reusable Ionogel Adhesive for Flexible Strain Sensor

Qi,

Liu,

Zhao

et al. 2024

ACS Appl. Polym. Mater.

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Ionogels have gained increasing attention in the field of flexible electronic devices. However, it is a huge challenge to prepare ionogels with high toughness and adhesive property. In this study, we present a straightforward approach to fabricating tough and reusable ionogel adhesives by randomly copolymerizing two monomers with varying solubilities in an ionic liquid solvent. Specifically, acrylamide (AM) and methacryloxyethyltrimethylammonium bis(trifluoromethanesulfonyl)imide ([MATAC]-[TFSI]) are copolymerized in situ in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) to form phase-separated ionogels, wherein the hydrogen-bond-rich phases and solvent-rich phases contribute to enhancing toughness. The abundant noncovalent interactions provide the robust internal cohesive force, which provides ionogels a stable adhesion ability during the cyclic adhesion−peeling process. The resulting ionogel adhesive exhibits elevated fracture strength (2.75 MPa), impressive toughness (9.58 MJ/m 3 ), non-disposable adhesiveness (0.692 MPa), and exceptional environmental stability. Moreover, the sensor prepared by ionogel adhesives demonstrates fatigue resistance and a wide detection range, thus holding potential for the development of advanced and sustainable flexible electronic devices.

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Section: Resultsmentioning

confidence: 99%

Section: First Two Kinds Of Ils With the Same Hydrophobic Anion That ...mentioning

confidence: 99%

A Tough and Reusable Ionogel Adhesive for Flexible Strain Sensor

Qi,

Liu,

Zhao

et al. 2024

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…By capturing and analyzing these biopotential signals, we can continuously monitor health status, achieve accurate disease diagnosis, and develop treatment strategies for clinicians. , The transduction of these biopotentials occurs through electrical interfacing with the skin via epidermal electrodes . Consequently, for the accurate acquisition of signals from the human body, the electrode must meet numerous requirements, including low impedance for optimal signal quality, , great stretchability and adhesion for signal stability, − robust durability and self-healing capabilities for long-term reliability, , and water solubility for biofriendly properties. − However, traditional electrophysiological electrodes are significantly influenced by external interferences such as muscle movements or skin motion due to rigid materials, resulting in degraded signal quality, and compromising the precision and reliability during data collection . Although commercial Ag/AgCl electrodes can obtain biopotential stably, signal attenuation is prone to occur over a long time because of the volatilization of the liquid. − Therefore, skin-friendly dry electrodes utilized for measuring bioelectrical signals have been extensively researched.…”

Section: Introductionmentioning

confidence: 99%

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Yu,

Luo,

Ouyang

et al. 2024

ACS Appl. Electron. Mater.

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Dry electrodes are vital tools for monitoring physiological signals in various applications. However, conventional dry electrodes encounter various limitations such as insufficient adhesion, poor antidisturbance, and discomfort in wearable electronics. In response to these challenges, this study introduces a polymeric dry electrode with excellent stretchability and low modulus to ensure comfort during signal acquisition. Furthermore, it features a low skin interface impedance, robust adhesion, and self-healing capabilities, ensuring reliable electrophysiological signal collection. The performance of the electrode can be rapidly restored with a self-healing capability when damaged in operation, and it can be broken into fragments when submerged in water after use due to its good solubility. Owing to the low interface impedance, good adhesion, self-healing capability, and water solubility, this dry electrode demonstrates significant advantages in high-quality and comfortable monitoring electrooculograms (EOG), electrocardiograms (ECG), and electromyograms (EMG). It shows the potential to provide reliable technical support for health monitoring and medical diagnosis while also reducing environmental impact.

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Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

Yan,

Zhao,

Lin

et al. 2024

Adv Funct Materials

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Ionogels are considered as ideal candidates for constructing flexible electronics due to their superior electrical conductivity, flexibility, high thermal and electrochemical stability. However, it remains a great challenge to simultaneously achieve high sensitivity, repeated adhesion, good self‐healing, and biocompatibility through a straightforward strategy. Herein, inspired by nucleobase‐tackified strategy, a multifunctional adhesive ionogel is developed through one‐step radical polymerization of acrylated adenine/uracil (Aa/Ua) and acrylic acid (AA) monomers in sodium caseinate (SC) stabilized liquid metal dispersions. As a soft conductive filler, the incorporating of liquid metal not only improves the electrical conductivity, but also enhances the mechanical strength, satisfying the stretchable sensing application. The large amount of noncovalent interactions (hydrogen bonding, metal coordination, and ion‐dipole interactions) within the networks enable the ionogels to possess excellent stretchability, skin‐like softness, good self‐healing, and strong adhesion. Based on these desirable characteristics, the ionogel is suitable for wearable strain sensors to precisely detect diverse human movements under extreme environments. Moreover, the seamless adhesion with human skin allows the ionogel to function as bioelectrode patch for long‐term and high‐quality electrophysiological signal acquisition. This research provides a promising strategy for designing ionogels with tailored functionalities for wearable electronics that satisfy diverse application requirements.

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Stretchable, self-healing, biocompatible, and durable ionogel for continuous wearable strain and physiological signal monitoring

Cited by 20 publications

References 47 publications

A Tough and Reusable Ionogel Adhesive for Flexible Strain Sensor

A Tough and Reusable Ionogel Adhesive for Flexible Strain Sensor

Self-Adhesive, Self-Healing, and Water-Soluble Polymeric Dry Electrodes for Robust Physiological Signal Monitoring

Nucleobase‐Driven Wearable Ionogel Electronics for Long‐Term Human Motion Detection and Electrophysiological Signal Monitoring

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