A Wireless Health Monitoring System Accomplishing Bimodal Decoupling Based on an “IS”‐Shaped Multifunctional Conductive Hydrogel

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

Abstract Flexible wearable sensors with bimodal functionality offer substantial value for human health monitoring, as relying on a single indicator is insufficient capturing comprehensive physiological information. However, face multiple challenges in practical applications, including mutual interference between various modalities, and integration of excellent mechanical properties, interfacial adhesion, environmental adaptability biocompatibility. Herein, the multifunctional hydrogel, synthesized through radical grafting supramolecular self‐crosslinking reactions, exhibits thermal sensitivity (TCR = −1.70% °C −1 ), high toughness (9.31 MJ m − 3 wide strain range (0–600%), outstanding adhesion strength (36.07 kPa), antifreeze, visualization, water retention, biocompatibility, antibacterial antioxidant capabilities. Leveraging its conductivity, this hydrogel can be applied electroluminescent, triboelectricity, electromyography message encryption. Moreover, fabricated smart temperature monitoring. To avoid two signals, system “IS”‐shaped configuration innovatively designed based finite element simulation results. The flexible circuit modules, data transmission form closed‐loop platform rehabilitation training patients arthritis or joint surgery. This strategy establishes decoupling self‐calibrating utilizing material to accurately detect parameters, advancing electronics personalized medicine.

Язык: Английский

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Silk fibroin-based hydrogels with low hysteresis, self-adhesion, and tunable ionic conductivity for wearable devices

International Journal of Biological Macromolecules, Год журнала: 2025, Номер 306, С. 141597 - 141597

Опубликована: Фев. 28, 2025

Язык: Английский

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Highly Stretchable, Tissue-like Ag Nanowire-Enhanced Ionogel Nanocomposites as an Ionogel-Based Wearable Sensor for Body Motion Monitoring

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(35), С. 46538 - 46547

Опубликована: Авг. 1, 2024

The development of wearable electronic devices for human health monitoring requires materials with high mechanical performance and sensitivity. In this study, we present a novel transparent tissue-like ionogel-based sensor based on silver nanowire-reinforced ionogel nanocomposites, P(AAm-co-AA) ionogel-Ag NWs composite. composite exhibits stretchability 605% strain moderate fracture stress about 377 kPa. also demonstrates sensitive response to temperature changes electrostatic adsorption. By encapsulating the nanocomposite in polyurethane film dressing, address issues such as skin irritation enable multidirectional stretching. Measuring resistive corresponding enables its utility highly stretchable excellent sensitivity, stability, repeatability. fabricated pressure array great proficiency distribution, capacitance sensing, discernment fluctuations both external electric fields stress. Our findings suggest that material holds promise applications flexible sensors, actuators.

Язык: Английский

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Hydrogel Electrolyte with Electron/Ion Dual Regulation Mechanism for Highly Reversible Flexible Zinc Batteries

Energy & Environmental Science, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

The unique electron/ion dual regulation mechanism is established in the well-designed hydrogel electrolyte by integrating polyacrylamide network and carboxylated multi-walled carbon nanotubes for high performance flexible ZIBs.

Язык: Английский

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Direct Ink Writing of Conductive Hydrogels

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Direct ink writing (DIW) is an additive manufacturing technique that has garnered notable interest due to its precise and consistent printing of a wide range materials, such as viscoelastic hydrogels, pastes, complex composites, by adjusting the ink's rheology. This material flexibility combined with ability print at room temperature makes DIW ideal for diverse applications scalable from small industrial levels. In recent years, conductive hydrogels gained significant attention across various fields, ranging biomedical scaffolds flexible electronics. Conductive are category which exhibit conductivity in their wet and/or dry state. Precursors like polymers, metallic nanoparticles, carbon‐based materials can be used induce electronic ionic hydrogels. review presents comprehensive overview demonstrating printability using technique. The fundamentals precursors presented. Following, different pathways reaching optimal hydrogel properties, including mechanical, conductive, rheological, focus on synthesis introduced. Finally, emerging electronics medicine highlighted, anticipated challenges advancement printable discussed.

Язык: Английский

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Ultra‐stretchable, super‐tough, and highly stable ion‐doped hydrogel for advanced robotic applications and human motion sensing

InfoMat, Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

Abstract Hydrogel‐based sensors are recognized as key players in revolutionizing robotic applications, healthcare monitoring, and the development of artificial skins. However, primary challenge hindering commercial adoption hydrogel‐based is their lack high stability, which arises from water content within hydrogel structure, leading to freezing at subzero temperatures drying issues if protective layer compromised. These factors result a significant decline benefits offered by aqueous gel electrolytes, particularly terms mechanical properties conductivity, crucial for flexible wearable electronics. Previous reports have highlighted several disadvantages associated with using cryoprotectant co‐solvents lower ion‐doped anti‐freezing sensors. In this study, design optimization photocrosslinkable ionic utilizing silk methacrylate novel natural crosslinker presented. This innovative demonstrates significantly enhanced properties, including stretchability (>1825%), tensile strength (2.49 MPa), toughness (9.85 MJ m – 3 ), resilience (4% hysteresis), compared its non‐ion‐doped counterpart. Additionally, exhibits exceptional nonfreezing behavior down −85°C, anti‐drying functional stability up 2.5 years, signal drift only 5.35% over 2450 cycles, whereas control variant, resembling commonly reported hydrogels, 149.8%. The successful application developed advanced robotics, combined pioneering demonstration combinatorial commanding single sensor, could potentially revolutionize sensor design, elevating it next level benefiting various fields. image

Язык: Английский

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Graphene‐Doped Hydrogels with Enhanced Conductivity and Stretchability for All‐Weather Wearable Devices

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract Conductive hydrogels with high water content, excellent adhesion, and mechanical flexibility have garnered significant attention for flexible wearable electronic applications. Despite advancements, achieving robust electrical properties under extreme environmental conditions remains a key challenge. In this study, cost‐effective, lignin‐tannin nanosphere graphene‐doped hydrogel (LTGH) synthesized by dispersing graphene within the matrix via self‐assembled sodium lignosulfonate tannic acid nanospheres is presented. The LTGH exhibits exceptional conductivity (28 S m −1 ), ultra‐high sensitivity (maximum gauge factor ≈350), an ultra‐low detection limit (<0.5%). Additionally, it demonstrates outstanding stretchability (>1800%), strong adhesion (>50 kPa), UV resistance, antibacterial properties. By incorporating ethylene glycol, maintains reliable performance across wide temperature range (−80 to 50 °C). Furthermore, successfully integrated into convolutional neural network‐based sign language recognition system, compact lightweight design accuracy, rapid responsiveness, cost efficiency. This work highlights superior sensing capabilities of conductive hydrogels, underscoring their potential in all‐weather technologies.

Язык: Английский

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Strain-Temperature Dual Sensor Based on Deep Learning Strategy for Human–Computer Interaction Systems

ACS Sensors, Год журнала: 2024, Номер 9(8), С. 4216 - 4226

Опубликована: Июль 28, 2024

Thermoelectric (TE) hydrogels, mimicking human skin, possessing temperature and strain sensing capabilities, are well-suited for human-machine interaction interfaces wearable devices. In this study, a TE hydrogel with high toughness responsiveness was created using the Hofmeister effect current effect, achieved through cross-linking of PVA/PAA/carboxymethyl cellulose triple networks. The facilitated by Na

Язык: Английский

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Photochromic ionogel with a wide temperature range and fatigue resistance for high-resolution rewritable information record

Chemical Engineering Journal, Год журнала: 2024, Номер 495, С. 153263 - 153263

Опубликована: Июнь 18, 2024

Язык: Английский

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Ultrastretchable freezing-tolerant organohydrogels for health monitoring and triboelectric nanogenerator-based gesture recognition

Nano Energy, Год журнала: 2024, Номер unknown, С. 110261 - 110261

Опубликована: Сен. 1, 2024

Язык: Английский

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