Xanthan gum toughen ionically conductive hydrogels for flexible and artificial epidermis sensors with multifunctionality and self-healability

Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 370, P. 115199 - 115199

Published: Feb. 20, 2024

Language: Английский

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Bimetallic-MOF Tunable Conductive Hydrogels to Unleash High Stretchability and Sensitivity for Highly Responsive Flexible Sensors and Artificial Skin Applications

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(12), P. 7288 - 7300

Published: June 6, 2024

Metal–organic frameworks (MOFs) are widely applied in various fields, including energy storage, drug delivery, wastewater treatment, and much more. However, their use hydrogels is limited due to low dispersion which causes agglomeration the hydrogel network many properties of sacrifices. Similarly, conductive have emerged as a promising material for skin-like sensors excellent biocompatibility mechanical flexibility. like MOFs, also face challenges such stretchability, toughness, susceptibility fatigue, resulting sensing range large response time-reduced durability sensors. In this study, highly stretchable, tough, antifatigue composite poly(dodecyl methacrylate-acrylamide-2-(acryloyloxy)ethyl trimethylammonium chloride) bimetallic metal–organic framework [p(DA-AM-AETAC)BM-MOF] was developed by integrating BM-MOFs into it. To achieve uniform within network, positively charged surfactant, ethyl hexadecyl dimethylammonium bromide, used. It facilitates formation hydrophobic interactions between matrix surface BM-MOFs. Furthermore, it can interact with surfactant polymer chains through physical interactions, significantly enhancing hydrogel. The BM-MOF-based exhibited impressive stretchability (1588%) toughness (537 kJ m–3), along exceptional properties. Moreover, demonstrated high conductivity 1.3 S/m tensile strain sensitivity ranging from 0.5 700% gauge factor 14.8 at response–recovery 195–145 ms. p(DA-AM-AETAC)BM-MOF displayed sensitive, reliable, repetitive detection wide human activities, wrist elbow rotation, finger bending, swallowing motion, speaking, well handwriting drawing. monitor pressure mimic skin. This highlights potential wearable strain, pressure, artificial skin flexible devices.

Language: Английский

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Nanocellulose based Hydrogel for Flexible Sensors: Current Progress and Future Perspective

Nano Energy, Journal Year: 2024, Volume and Issue: 129, P. 109974 - 109974

Published: July 14, 2024

Language: Английский

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An ultralow hysteresis zwitterionic hydrogel crosslinked by functionalized graphene oxide quantum dots for dual-responsive flexible wearable sensors

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149282 - 149282

Published: Feb. 5, 2024

Language: Английский

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Strong and tough poly(vinyl alcohol)/xanthan gum-based ionic conducting hydrogel enabled through the synergistic effect of ion cross-linking and salting out

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 263, P. 130511 - 130511

Published: Feb. 27, 2024

Language: Английский

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Multi-role conductive hydrogels for flexible transducers regulated by MOFs for monitoring human activities and electronic skin functions

Journal of Materials Chemistry B, Journal Year: 2024, Volume and Issue: 12(25), P. 6190 - 6202

Published: Jan. 1, 2024

Metal organic frameworks (MOFs) have garnered significant attention in the development of stretchable and wearable conductive hydrogels for flexible transducers. However, MOFs used hydrogel networks been hampered by low mechanical performance poor dispersibility aqueous solutions, which affect hydrogels, including toughness, limited self-recovery, short working ranges, conductivity, prolonged response-recovery times. To address these shortcomings, a novel approach was adopted micelle co-polymerization

Language: Английский

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Starch/ionic liquid/hydrophobic association hydrogel with high stretchability, fatigue resistance, self-recovery and conductivity for sensitive wireless wearable sensors

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 346, P. 122608 - 122608

Published: Aug. 12, 2024

Language: Английский

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Multifunctional Capabilities of Malonic Acid-Bridged Conductive Hydrogels for Wearable Electronic Devices

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(16), P. 9940 - 9951

Published: Aug. 12, 2024

Flexible and strain-sensing smart materials have received significant attention from researchers due to their potential use in human motion detection, soft robotics, epidermis sensors, energy storage devices, etc. However, low mechanical strength, range sensitivity, high time response, antifatigue resistance hampered the application of previously fabricated materials. Herein, a malonic acid (MA)-reinforced hydrogel was prepared through one-pot-free radical polymerization, which MA makes bridge by connecting hydrophobically associated polyacrylamide (PAmm) polydodecyl methacrylate (PDDMA) physical cross-linking. Ethyl-hexadecyl dimethylammonium bromide (EHDDAB), cationic surfactant, is used ensure formation micelles. The micelles polymer chains are bridged via interactions electrostatic charge enhanced dicarboxylic groups present on molecules. Notable strength observed for MA4 with 2102% strain, 2.36 MPa stress, excellent cyclic stability. At 500% suggests sensitivity tensile as indicated its gauge factor 6.9 fast response recovery time. Meanwhile, ionic conductivity after addition LiCl calculated 0.20 S/m. Furthermore, practical applications were detection different motions like finger bending, wrist movement, elbow knee movements. Similarly, small physiological larynx vibration detected speaking, coughing, drinking water. an electronic pen showed responses multiple languages both speaking writing. MA-regulated hydrogels show possibility flexible many applications, including touch screens, biomedical monitoring, robotic devices.

Language: Английский

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Multifunctional Conductive Double-Network Hydrogel Sensors for Multiscale Motion Detection and Temperature Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(51), P. 59854 - 59865

Published: Dec. 14, 2023

As typical soft materials, hydrogels have demonstrated great potential for the fabrication of flexible sensors due to their highly compatible elastic modulus with human skin, prominent flexibility, and biocompatible three-dimensional network structure. However, practical application wearable hydrogel is significantly constrained because weak adhesion, limited stretchability, poor self-healing properties traditional hydrogels. Herein, a multifunctional sodium hyaluronate (SH)/borax (B)/gelatin (G) double-cross-linked conductive (SBG) was designed constructed through simple one-pot blending strategy SH gelatin as gel matrix borax dynamic cross-linker. The obtained SBG exhibited moderate tensile strength 25.3 kPa at large elongation 760%, high interfacial toughness (106.5 kJ m–3), strong adhesion (28 paper), satisfactory conductivity (224.5 mS/m). In particular, cross-linking between SH, gelatin, via borate ester bonds hydrogen chain endowed good fatigue resistance (>300 cycles), rapid performance (HE (healing efficiency) ∼97.03%), excellent repeatable adhesion. sensor assembled desirable strain sensing competitive gauge factor exceptional stability, which enabled it detect distinguish various multiscale motions physiological signals. Furthermore, capable precisely perceiving temperature variation thermal sensitivity (1.685% °C–1). result, displayed dual sensory deformation. It envisioned that integration provide novel convenient next generation multisensory electronics lay solid foundation in electronic skin actuators.

Language: Английский

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Ion–electron based poly(Amm-co-BA)@GO conductive hydrogels for wearable strain sensors

Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 364, P. 114782 - 114782

Published: Oct. 29, 2023

Language: Английский

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