Functional conductive hydrogels: from performance to flexible sensor applications

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(15), P. 2925 - 2957

Published: Jan. 1, 2023

Conductive hydrogels combine the softness of and conductivity conductive media, functionalized with practical application functions will become ideal materials for fabricating flexible sensors.

Language: Английский

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Self-Healable, Self-Adhesive and Degradable MXene-Based Multifunctional Hydrogel for Flexible Epidermal Sensors

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(6), P. 7826 - 7837

Published: Feb. 1, 2024

Conductive hydrogels have garnered significant interest in the realm of wearable flexible sensors due to their close resemblance human tissue, wearability, and precise signal acquisition capabilities. However, concurrent attainment an epidermal hydrogel sensor incorporating reliable self-healing capabilities, biodegradability, robust adhesiveness, ability precisely capture subtle electrophysiological signals poses a daunting intricate challenge. Herein, innovative MXene-based composite (PBM hydrogel) with exceptional self-healing, self-adhesive, versatile functionality is engineered through integration conductive MXene nanosheets into well-structured poly(vinyl alcohol) (PVA) bacterial cellulose (BC) three-dimensional (3D) network, utilizing multiple dynamic cross-linking synergistic repeated freeze–thaw strategy. The harnesses presence dynamically reversible borax ester bonds hydrogen between its constituents, endowing it rapid efficiency (97.8%) formidable self-adhesive capability. assembled PBM possesses response time (10 ms) exhibits versatility detecting diverse external stimuli movements such as vocalization, handwriting, joint motion, Morse code signals, even monitoring infusion status. Additionally, offers added advantage swift degradation phosphate-buffered saline solution (within span 56 days) H2O2 (in just 53 min), maintaining eco-friendly profile devoid any environmental pollution. This work lays groundwork for possible uses electronic skins, interactions humans machines, individualized healthcare.

Language: Английский

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Cellulose-Based Conductive Hydrogels for Emerging Intelligent Sensors

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

Published: June 14, 2024

Language: Английский

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Gesture Recognition System Using Reduced Graphene Oxide-Enhanced Hydrogel Strain Sensors for Rehabilitation Training

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(38), P. 45106 - 45115

Published: Sept. 12, 2023

Gesture recognition systems epitomize a modern and intelligent approach to rehabilitative training, finding utility in assisted driving, sign language comprehension, machine control. However, wearable devices that can monitor motivate physically rehabilitated people real time remain little studied. Here, we present an innovative gesture system integrates hydrogel strain sensors with learning facilitate finger rehabilitation training. PSTG (PAM/SA/TG) hydrogels are constructed by thermal polymerization of acrylamide (AM), sodium alginate (SA), tannic acid-reduced graphene oxide (TA-rGO, TG), AM polymerizing into polyacrylamide (PAM). The surface TG has abundant functional groups establish multiple hydrogen bonds PAM SA chains endow the high stretchability mechanical stability. Our sensor boasts impressive sensitivity (Gauge factor = 6.13), fast response (40.5 ms), linearity (R2 0.999), making it effective tool for monitoring human joint movements pronunciation. Leveraging techniques, our accurately discerns nine distinct types gestures accuracy 100%. research drives advancements, elevating landscape patient augmenting systems' healthcare applications.

Language: Английский

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Multifunctional acetylated distarch phosphate based conducting hydrogel with high stretchability, ultralow hysteresis and fast response for wearable strain sensors

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 318, P. 121106 - 121106

Published: June 19, 2023

Language: Английский

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Novel flexible hydrogels based on carboxymethyl guar gum and polyacrylic acid for ultra-highly sensitive and reliable strain and pressure sensors

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 324, P. 121515 - 121515

Published: Oct. 19, 2023

Language: Английский

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A chitosan-based conductive double network hydrogel doped by tannic acid-reduced graphene oxide with excellent stretchability and high sensitivity for wearable strain sensors

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 258, P. 128861 - 128861

Published: Dec. 17, 2023

Language: Английский

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An Intrinsic Self‐Healable, Anti‐Freezable and Ionically Conductive Hydrogel for Soft Ionotronics Induced by Imidazolyl Cross‐Linker Molecules Anchored with Dynamic Disulfide Bonds

Macromolecular Rapid Communications, Journal Year: 2023, Volume and Issue: 45(6)

Published: Dec. 29, 2023

Hydrogels are ideal materials for flexible electronic devices based on their smooth ion channels and considerable mechanical flexibility. A substantial volume of aqueous solution is required to enable the flow ions, resulting in agony low-temperature freezing; besides, long-term exposure bending/tensile tress triggers fatigue issues. Therefore, it a great challenge prepare hydrogels with both freeze-resistance durability. Herein, polyacrylic acid-based hydrogel hydrophobic interaction dynamic reversible covalent bonding cross-linking networks preparing (DC-hydrogel) by polymerizing bi-functional imidazole-type ionic liquid monomer integrated disulfide alkene bonds (DS/DB-IL) an octadecyl methacrylate, achieving self-healing. The DS/DB-IL anchored into polymer backbone has high affinity water, reducing freezing point while free ions provides superior conductivity DC-hydrogel. acid abundant carboxyl gives good self-adhesiveness different substrates. Ionotronics resistance-type sensors stable output performance fabricated explored its application joint motion health information. Moreover, hydrogel-based sensing arrays resolution accuracy identify 2D distribution stress. have promise various ionotronics many fields.

Language: Английский

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Single/Multi-Network Conductive Hydrogels—A Review

Polymers, Journal Year: 2024, Volume and Issue: 16(14), P. 2030 - 2030

Published: July 16, 2024

Hydrogels made from conductive organic materials have gained significant interest in recent years due to their wide range of uses, such as electrical conductors, freezing resistors, biosensors, actuators, biomedical engineering materials, drug carrier, artificial organs, flexible electronics, battery solar cells, soft robotics, and self-healers. Nevertheless, the insufficient level effectiveness electroconductive hydrogels serves a driving force for researchers intensify endeavors this domain. This article provides concise overview advancements creating self-healing single- or multi-network (double triple) (CHs) using natural synthetic polymers monomers. We deliberated on efficacy, benefits, drawbacks several hydrogels. paper emphasizes use innovative 3D printing CHs-based technology create gels electronics. In conclusion, advantages disadvantages been noted, some potential opportunities proposed.

Language: Английский

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Comprehensive Insights and Advancements in Gel Catalysts for Electrochemical Energy Conversion

Gels, Journal Year: 2024, Volume and Issue: 10(1), P. 63 - 63

Published: Jan. 15, 2024

Continuous worldwide demands for more clean energy urge researchers and engineers to seek various applications, including electrocatalytic processes. Traditional energy-active materials, when combined with conducting materials non-active polymeric inadvertently leading reduced interaction between their active components. This results in a drop catalytic sites, sluggish kinetics, compromised mass electronic transport properties. Furthermore, these could increase degradation products, impeding the efficiency of process. Gels appears be promising candidates solve challenges due larger specific surface area, three-dimensional hierarchical accommodative porous frameworks particles, self-catalytic properties, tunable electrochemical as well inherent stability cost-effectiveness. review delves into strategic design gel focusing on potential advanced conversion storage technologies. Specific attention is given material strategies, exploring fundamental approaches processes such CO2 reduction reaction (CO2RR), oxygen (ORR), evolution (OER), more. comprehensive not only addresses current developments but also outlines future research strategies field. Moreover, it provides guidance overcoming challenges, ensuring holistic understanding role advancing

Language: Английский

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