A Review of Conductive Hydrogel‐Based Wearable Temperature Sensors

Advanced Healthcare Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 10, 2024

Conductive hydrogel has garnered significant attention as an emergent candidate for diverse wearable sensors, owing to its remarkable and tailorable properties such flexibility, biocompatibility, strong electrical conductivity. These attributes make it highly suitable various sensor applications (e.g., biophysical, bioelectrical, biochemical sensors) that can monitor human health conditions provide timely interventions. Among these applications, conductive hydrogel-based temperature sensors are especially important healthcare disease surveillance. This review aims a comprehensive overview of sensors. First, this work summarizes different types fillers-based hydrogel, highlighting their recent developments advantages Next, discusses the sensing characteristics focusing on sensitivity, dynamic stability, stretchability, signal output. Then, state-of-the-art introduced, ranging from body detection wound monitoring. Finally, identifies remaining challenges prospects facing field. By addressing with potential solutions, hopes shed some light future research innovations in promising

Language: Английский

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Extreme Hydrogel Bioelectronics

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 20, 2024

Abstract The last decades have witnessed the rapid growth of hydrogel bioelectronics. Traditional hydrogels face challenges when working under extreme conditions, causing a loss stabilities and functionalities. This review provides systematic overview capable with focus on their applications in bioelectronic systems. These are summarized into categories anti‐mechanical damage, anti‐detachment, anti‐swelling, anti‐freezing, anti‐foreign body response. Strategies including material development structural design that can endow above properties introduced. Finally, current new opportunities developing devices systems discussed.

Language: Английский

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Self-assembly polysaccharide network regulated hydrogel sensors with toughness, anti-freezing, conductivity and wide working conditions

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154409 - 154409

Published: Aug. 3, 2024

Language: Английский

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A Transparent, Freezing-Tolerant, and Mechanically Robust Ion-Conductive Hydrogel for Strain-Sensing Applications

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Ion-conductive hydrogels have attracted tremendous attention and are considered promising for ionic skin. However, the simultaneous incorporation of excellent mechanical strength, low-temperature tolerance, high conductivity transparency remains a great challenge, which will restrict their scope applications. Here, transparent, freezing-tolerant, mechanically robust ion-conductive hydrogel based on double-network structure (k-carrageenan/poly(acrylic acid)) in binary solvent system (ionic liquid/water) is proposed strain-sensing application. The liquid ([EMIM]Cl) introduced into double network by simple one-pot polymerization method, followed subsequent drying treatment. Benefiting from presence liquid, prepared transparent (>90% transmittance) demonstrates properties, including fracture stretchability (>3000% strain), tensile strength (>0.45 MPa), low Young's modulus (65 kPa). Meanwhile, due to reduction water system, exhibit good freezing tolerance (<−25 °C), while maintaining up 0.25 S/m at room temperature. In addition, benefiting hydrogel-based flexible strain sensors studied demonstrated various applications toward deformation detect human motion signals, such as finger bending walking. This work can provide strategy construct with environmental stability potential wearable sensors.

Language: Английский

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Ion-conductive hydrogel sensor prepared with alginate crosslinker for wide-range motion and temperature monitoring

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 354, P. 123278 - 123278

Published: Jan. 19, 2025

Language: Английский

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Facile synthesis of ultratough conductive gels with swelling and freezing resistance for flexible sensor applications

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 1, 2025

Abstract The application of flexible hydrogel sensors in extreme environments, such as low temperatures, underwater, or significant mechanical deformations, poses considerable challenges. Here, we present a simple one-pot method to fabricate ultra-tough, swelling- and freezing-resistant conductive organohydrogels without external freeze-resistant fillers. During gelation, by-products (C 6 H 15 NHCl, KCl) provide both conductivity antifreeze properties, thus eliminating compatibility issues dispersion challenges associated with resulting gel exhibits super toughness, tensile strength reaching 10.2 MPa stretchability up 800% the dry state. Following covalent crosslinking, demonstrates excellent anti-swelling swelling ratio only 15.4% after 24 h water immersion, while maintaining 5.8 an elongation 1000%. When fabricated into sensors, these gels display stable electrical responsiveness desired Gauge Factor (0.58–2.25), effectively detecting limb movements. Furthermore, gel’s superior resistance freezing ensures reliable signal stability under − 20 °C underwater conditions. These combined properties render promising candidate for sensing components robotic bionic applications.

Language: Английский

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A direct written strain-insensitive temperature sensor based on a multi-polygonal structure for human temperature monitoring

Nano Energy, Journal Year: 2024, Volume and Issue: 131, P. 110199 - 110199

Published: Sept. 4, 2024

Language: Английский

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Strong and anti-freezing alginate-based hydrogel with humidity response and wide-temperature-range strain sensing ability

Polymer, Journal Year: 2024, Volume and Issue: 295, P. 126735 - 126735

Published: Jan. 24, 2024

Language: Английский

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An adhesive, stretchable, and freeze-resistant conductive hydrogel strain sensor for handwriting recognition and depth motion monitoring

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 677, P. 273 - 281

Published: July 29, 2024

Language: Английский

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

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 29, 2024

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

Language: Английский

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