Multifunctional conductive hydrogels and their applications as smart wearable devices

Journal of Materials Chemistry B, Journal Year: 2021, Volume and Issue: 9(11), P. 2561 - 2583

Published: Jan. 1, 2021

Recently, hydrogel-based conductive materials and their applications as smart wearable devices have been paid tremendous attention due to high stretchability, flexibility, excellent biocompatibility. Compared with single functional hydrogels, multifunctional hydrogels are more advantageous match various demands for practical applications. This review focuses on applied devices. Representative strategies conduction of discussed firstly: (1) electronic based the fillers (2) ionic charged ions. Then, common intensive research multiple functionalities such mechanical properties, sensory anti-freezing moisturizing adhesion self-healing properties is presented. The in human motion sensors, skins, personal healthcare diagnosis provided third part. Finally, we offer our perspective open challenges future areas interest used

Language: Английский

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Recent Advances in Stimuli‐Responsive Shape‐Morphing Hydrogels

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(39)

Published: July 14, 2022

Abstract Inspired by shape‐morphing organisms in nature, researchers have developed various hydrogels with stimuli‐responsive swelling, shrinking, bending, folding, origami, rolling, twisting, or locomotion. These smart are usually created patterning 4D printing. The shape morphing of allows the fabrication helixing, and rolling microstructures, all which hard to reproduce directly ordinary techniques. More importantly, under external stimuli (e.g., solvent, humidity, temperature, light, pH, electric/magnetic fields), many exhibit recoverable thus find promising applications grippers, sensors, valves, soft robotics, etc. Since determines functions a great number cases, herein, recent advances summarized, their types, mechanisms, methods, modes, extensive covered. conclusion perspectives also presented guide design functional hydrogels.

Language: Английский

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Multifunctional Hydrogels for the Healing of Diabetic Wounds

Advanced Healthcare Materials, Journal Year: 2023, Volume and Issue: 13(1)

Published: Sept. 13, 2023

Abstract The healing of diabetic wounds is hindered by various factors, including bacterial infection, macrophage dysfunction, excess proinflammatory cytokines, high levels reactive oxygen species, and sustained hypoxia. These factors collectively impede cellular behaviors the process. Consequently, this review presents intelligent hydrogels equipped with multifunctional capacities, which enable them to dynamically respond microenvironment accelerate wound in ways, stimuli ‐responsiveness, injectable self‐healing, shape ‐memory, conductive real‐time monitoring properties. relationship between multiple functions also discussed. Based on wounds, antibacterial, anti‐inflammatory, immunomodulatory, antioxidant, pro‐angiogenic strategies are combined hydrogels. application repair systematically discussed, aiming provide guidelines for fabricating exploring role therapeutic processes.

Language: Английский

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Recent progress in polymer hydrogel bioadhesives

Journal of Polymer Science, Journal Year: 2021, Volume and Issue: 59(13), P. 1312 - 1337

Published: May 25, 2021

Abstract Adhesive hydrogels have broad applications in tissue adhesives, hemostatic agents, and biomedical sensors. Various bio‐inspired glues synthetic adhesives are clinically used as conventional agents auxiliary tools for wound closure. Medical needed to effectively quickly control bleeding, thereby reducing the risk of complications caused by severe blood loss. sensors need excellent skin compliance, mechanical properties, sensitivity, biological safety. This review focuses on recent progress adhesive hydrogel systems, their structures, adhesion mechanisms, construction strategies, emerging field.

Language: Английский

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A temperature responsive adhesive hydrogel for fabrication of flexible electronic sensors

npj Flexible Electronics, Journal Year: 2022, Volume and Issue: 6(1)

Published: Aug. 5, 2022

Abstract Flexible electronics are playing an increasingly important role in human health monitoring and healthcare diagnosis. Strong adhesion on tissue would be ideal for reducing interface resistance motion artifacts, but arising problems such as skin irritation, rubefaction, pain upon device removal have hampered their utility. Here, inspired by the temperature reversibility of hydrogen bonding, a skin-friendly conductive hydrogel with multiple-hydrogen bonds was designed using biocompatible poly(vinyl alcohol) (PVA), phytic acid (PA), gelatin (Gel). The obtained PVA/PA/Gel (PPG) temperature-triggered tunable mechanic could reliably adhere to detect electrophysiological signals under hot compress while readily removed cool compress. Furthermore, additional advantages transparency, breathability, antimicrobial activity PPG ensure its long-time wearable value skin. It is both environmentally friendly cost saving waste during production can recycled based reversible physical bonding. sensor expected good application prospects record monitoring.

Language: Английский

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Biomimetic Chromotropic Photonic‐Ionic Skin with Robust Resilience, Adhesion, and Stability

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(33)

Published: June 1, 2022

Abstract The growing interest in mimicry of biological skins greatly promotes the birth high‐performance artificial skins. Chameleon can actively transform environmental information into bioelectrical and color‐change signals simultaneously through manipulating ion transduction photonic nanostructures. Here, inspired by chameleon skins, a novel biomimetic chromotropic photonic‐ionic skin (PI‐skin) capable outputting synergistic electrical optical under strain with robust adhesion, stability, resilience is ingeniously constructed. PI‐skin exhibits sensitive structural color change synchronized response via adjusting lattice spacing crystal (mechanochromic sensitivity: 1.89 nm per %, Δ λ > 150 nm). Notably, polyzwitterionic network provides abundant electrostatic interactions, endowing excellent tolerance, outstanding mechanical stability ( 10 000 continuous cycles). Meanwhile, high loading ionic liquid (IL) weakens interaction between molecular chains, leading to resilience. finally applied construct visually interactive wearable device, realizing precise human motion monitoring, remote communication, visual localization pressure distribution. This work not only expands design ideas for construction advanced I‐skins but also general platform high‐level devices smart electronics.

Language: Английский

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High-strength, highly conductive and woven organic hydrogel fibers for flexible electronics

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 428, P. 131172 - 131172

Published: July 7, 2021

Language: Английский

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A UV-filtering, environmentally stable, healable and recyclable ionic hydrogel towards multifunctional flexible strain sensor

Composites Part B Engineering, Journal Year: 2021, Volume and Issue: 230, P. 109528 - 109528

Published: Nov. 25, 2021

Language: Английский

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Selection of hydrogel electrolytes for flexible zinc–air batteries

Materials Today Chemistry, Journal Year: 2021, Volume and Issue: 21, P. 100538 - 100538

Published: Aug. 1, 2021

Language: Английский

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Non-swelling, super-tough, self-healing, and multi-responsive hydrogels based on micellar crosslinking for smart switch and shape memory

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 450, P. 138346 - 138346

Published: Aug. 1, 2022

Language: Английский

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