A Review of Conductive Hydrogel‐Based Wearable Temperature Sensors

Advanced Healthcare Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 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

Язык: Английский

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Ultra‐Stretchable Composite Organohydrogels Polymerized Based on MXene@Tannic Acid‐Ag Autocatalytic System for Highly Sensitive Wearable Sensors

Small, Год журнала: 2024, Номер 20(47)

Опубликована: Авг. 14, 2024

Conductive hydrogels have attracted widespread attention in the fields of biomedicine and health monitoring. However, their practical application is severely hindered by lengthy energy-intensive polymerization process weak mechanical properties. Here, a rapid method polyacrylic acid/gelatin double-network organohydrogel designed integrating tannic acid (TA) Ag nanoparticles on conductive MXene nanosheets as catalyst binary solvent water glycerol, requiring no external energy input. The synergistic effect TA NPs maintains dynamic redox activity phenol quinone within system, enhancing efficiency ammonium persulfate to generate radicals, leading 10 min. Also, ternary composite MXene@TA-Ag can act agents, enhanced fillers, adhesion promoters, antibacterial agents organohydrogels, granting them excellent multi-functionality. organohydrogels exhibit stretchability (1740%) high tensile strength (184 kPa). strain sensors based ultrahigh sensitivity (GF = 3.86), low detection limit (0.1%), stability (>1000 cycles, >7 days). These monitor human limb movements, respiratory vocal cord vibration, well various levels arteries. Therefore, this holds potential for applications such monitoring speech recognition.

Язык: Английский

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Damping Supramolecular Elastomer for Steady Hypothermic Sensing

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract Flexible temperature sensors often use gels to achieve skin‐inspired softness, but the water evaporation and freezing of hydrogel leakage ionogel, cause unstable signal transmission inaccurate measurement at sub‐zero temperatures. Here steady hypothermic sensing is achieved by designing a supramolecular elastomer containing two types segments: liquid‐free iontronic segment transmit electrical charges prevent ion leakage, neutral with pendant chains damp vibration for stable transmission. The exhibits excellent tensile properties, adhesiveness, self‐healing, ionic conductivity A wireless system fabricated based on supermolecule elastomer, realizing accurate, steady, sensitive real‐time detection. Especially, sensor coefficient resistance (TCR) 8.87% °C −1 from −20 −15 °C, three five times higher than that most flexible sensors. There no significant difference in detected this an infrared thermal imaging camera. Such represents step toward highly accurate cold chain transportation beyond.

Язык: Английский

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Smart‐Adhesive, Breathable and Waterproof Fibrous Electronic Skins

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 25, 2024

For the need of direct contact with skin, electronic skins (E-skins) should not only fulfill electric functions, but also ensure comfort during wearing, including permeability, waterproofness, and easy removal. Herein, study has developed a self-adhesive, detach-on-demand, breathable, waterproof E-skin (PDSC) for motion sensing wearable by electrospinning styrene-isoprene block copolymer rubber carbon black nanosheets as layer liner copolymers N, N-dimethylacrylamide, n-octadecyl acrylate lauryl methacrylate adhesive layer. The high elasticity microfiber network structure endow PDSC good sensitivity linearity strain sensing. hydrophobic crystallizable ensures robust, waterproof, detaching-on-demand skin adhesion. Meanwhile, fiber enables air water permeability. integration functions endows great potential human activities both performances.

Язык: Английский

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A Ga-Bp Compensated Pedot:Pss/Mxene Wearable Nh3 Detection Device for Food Safety, Environmental Monitoring, and Disease Diagnosis

Опубликована: Янв. 1, 2025

Язык: Английский

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Highly stretchable, anti-freezing, self-adhesion and self-healing zwitterionic hydrogel electrolytes for flexible electronic devices

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161021 - 161021

Опубликована: Фев. 1, 2025

Язык: Английский

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Polyvinyl Alcohol/Quaternary Ammonium Chitosan Hydrogels with Excellent Conductivity, Adhesion, Antibacterial and Biocompatibility for Wearable Sensors

Composites Communications, Год журнала: 2025, Номер unknown, С. 102342 - 102342

Опубликована: Март 1, 2025

Язык: Английский

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Wearable Biomonitoring with 2D Carbon‐Based Nanocomposite Hydrogels

Advanced Physics Research, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Abstract Wearable bioelectronics facilitates continuous and efficient monitoring of physiological data, providing real‐time insights personalized medical guidance. However, the reliance on rigid materials in many existing devices restricts flexibility comfort, hindering their seamless integration with soft, dynamic nature human tissue for prolonged on‐body use. 2D carbon‐based nanocomposite hydrogels, renowned tissue‐like elasticity softness, offer immense potential advancing wearable bioelectronics. This review explores synthesis methods performance optimization strategies these innovative materials. It categorizes reinforcement mechanisms nanomaterials, emphasizing improvements mechanical properties, electrical conductivity, multifunctionality. Additionally, it highlights diverse applications hydrogels discusses current challenges future opportunities into flexible bioelectronic devices.

Язык: Английский

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Mechanical tough, stretchable, and adhesive PEDOT:PSS-based hydrogel flexible electronics towards multi-modal wearable application

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161645 - 161645

Опубликована: Март 1, 2025

Язык: Английский

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Nanoporous Bisphenol A-Based Polymeric Network Featuring Spontaneous Microphase-Separation Enables Transparent Multifunctional Hydrogels

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 21, 2025

Multifunctional hydrogels have garnered significant interest but remain challenging due to the complex preparation process and high cost of raw materials. Herein, bisphenol A diglycidyl ether (BADGE) poly(ethylene glycol) (PEGDGE) were reacted with 3-amino-1-propanol via a catalyst-free amine–epoxy "click" chemistry, followed by addition hydrophilic 1,3-propane sultone (1,3-PS) higher water content, then cross-linked hexamethylene diisocyanate (HDI) in one-pot provide polymer network, i.e., PBAxPEGyPU–PS. The two-step cross-linking method enables greater precision controlling density process. situ microphase-separated porous PBA50PEG50PU–PS demonstrates nanosized pores approximately 100 nm uniform distribution thermodynamic incompatibility, enabling superior mechanical properties transparency 87.9%. Upon absorption loss cycle, 89.7% was obtained lower pore 50 solvent-induced self-assembly its amphiphilic structure. Furthermore, bilayer hydrogel composed WPBA90PEG10PU–PS WPBA50PEG50PU–PS designed for "Janus" soft actuator based on difference between two sides swelling ability upon absorption, which has been applied underwater grasping humidity-responsive switch. To maintain inherent elasticity conductivity hydrogel, glycerol (Gly) sodium ion (Na+) introduced into mixture. It shows that WPBA50PEG50PU–PS/Gly67 maintains environmental stability more than 80% weight at 20 °C 72 h additional frost resistance −20 °C, dual network WPBA50PEG50PU–PS/Gly67/Na10 exhibits best comprehensive tensile strength good conductivity. Meanwhile, 1,3-PS provides quaternary ammonium salt sulfobetaine, endowing multicomponent antibacterial sensing capabilities. This work versatile approach preparing transparent multifunctional highlights their potential various applications.

Язык: Английский

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