Multifunctional conductive hydrogel-based flexible wearable sensors

TrAC Trends in Analytical Chemistry, Год журнала: 2020, Номер 134, С. 116130 - 116130

Опубликована: Ноя. 26, 2020

Язык: Английский

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Nanocomposite hydrogel-based strain and pressure sensors: a review

Journal of Materials Chemistry A, Год журнала: 2020, Номер 8(36), С. 18605 - 18623

Опубликована: Янв. 1, 2020

Design methods and applications of nanocomposite hydrogel-based strain pressure sensors have been summarized classified in this review.

Язык: Английский

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Environment Tolerant Conductive Nanocomposite Organohydrogels as Flexible Strain Sensors and Power Sources for Sustainable Electronics

Advanced Functional Materials, Год журнала: 2021, Номер 31(24)

Опубликована: Апрель 8, 2021

Abstract Conductive hydrogels (CHs) have been highlighted in the design of flexible strain sensors and stretchable triboelectric nanogenerators (TENGs) on basis their excellent physicochemical properties such as large stretchability high conductivity. Nevertheless, incident freezing drying behaviors CHs by using water solvent dispersion medium limit application scopes significantly. Herein, an environment tolerant ultrastretchable organohydrogel is demonstrated a simple solvent‐replacement strategy, which partial as‐synthesized polyacrylamide/montmorillonite/carbon nanotubes hydrogel replaced with glycerol, leading to temperature toleration (−60 60 °C) good stability (30 days under normal environment) without sacrificing The exhibits ultrawide sensing range (0–4196%) sensitivity 8.5, enabling effective detection discrimination human activities that are gentle or drastic various conditions. Furthermore, assembled single‐electrode TENG, displays energy harvesting ability even 500% robustness directly power wearable electronics harsh cold This work inspires route for multifunctional promises practical self‐powered devices extreme environments.

Язык: Английский

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Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Advanced Functional Materials, Год журнала: 2021, Номер 31(40)

Опубликована: Июль 11, 2021

Abstract Electronic skin (e‐skin) is driving significant advances in flexible electronics as it holds great promise health monitoring, human–machine interfaces, soft robotics, and so on. Flexible sensors that can detect various stimuli or have multiple properties play an indispensable role e‐skin. Despite tremendous research efforts devoted to with excellent performance regarding a certain sensing mode property, emerging e‐skin demands multifunctional be endowed the skin‐like capability beyond. Considering outstanding superiorities of electrical conductivity, chemical stability, ease functionalization, carbon materials are adopted implement sensors. In this review, latest carbon‐based regard types detection modes abundant introduced. The corresponding preparation process, device structure, mechanism, obtained performance, intriguing applications highlighted. Furthermore, diverse systems by integrating current cutting‐edge technologies (e.g., data acquisition transmission, neuromorphic technology, artificial intelligence) systematically investigated detail. Finally, existing problems future developing directions also proposed.

Язык: Английский

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Self-Recovery, Fatigue-Resistant, and Multifunctional Sensor Assembled by a Nanocellulose/Carbon Nanotube Nanocomplex-Mediated Hydrogel

ACS Applied Materials & Interfaces, Год журнала: 2021, Номер 13(42), С. 50281 - 50297

Опубликована: Окт. 12, 2021

Flexible sensors have attracted great research interest due to their applications in artificial intelligence, wearable electronics, and personal health management. However, the inherent brittleness of common hydrogels, preparing a hydrogel-based sensor integrated with excellent flexibility, self-recovery, antifatigue properties still remains challenge date. In this study, type physically chemically dual-cross-linked conductive hydrogels based on 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofiber (TOCN)-carrying carbon nanotubes (CNTs) polyacrylamide (PAAM) matrix via facial one-pot free-radical polymerization is developed for multifunctional sensing application. Inside hierarchical gel network, TOCNs not only serve as nanoreinforcement toughening effect but also efficiently assist homogeneous distribution CNTs hydrogel matrix. The optimized TOCN-CNT/PAAM integrates high compressive (∼2.55 MPa at 60% strain) tensile (∼0.15 MPa) strength, intrinsic self-recovery property (recovery efficiency >92%), capacity under both cyclic stretching pressing. assembled by exhibit strain sensitivity (gauge factor ≈11.8 100-200% good pressure ability over large range (0-140 kPa), which can effectively detect subtle large-scale human motions through repeatable stable electrical signals even after 100 loading-unloading cycles. comprehensive performance superior those most gel-based previously reported, indicating its potential devices healthcare systems motion monitoring.

Язык: Английский

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Design and fabrication of conductive polymer hydrogels and their applications in flexible supercapacitors

Journal of Materials Chemistry A, Год журнала: 2020, Номер 8(44), С. 23059 - 23095

Опубликована: Янв. 1, 2020

Conductive polymer hydrogels, which combine the advantages of both polymers and conductive materials, have huge potential in flexible supercapacitors.

Язык: Английский

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Recent progress of antibacterial hydrogels in wound dressings

Materials Today Bio, Год журнала: 2023, Номер 19, С. 100582 - 100582

Опубликована: Фев. 16, 2023

Hydrogels are essential biomaterials due to their favorable biocompatibility, mechanical properties similar human soft tissue extracellular matrix, and repair properties. In skin wound repair, hydrogels with antibacterial functions especially suitable for dressing applications, so novel hydrogel dressings have attracted widespread attention, including the design of components, optimization preparation methods, strategies reduce bacterial resistance, etc. this review, we discuss fabrication challenges associated crosslinking methods chemistry materials. We investigated advantages limitations (antibacterial effects mechanisms) different components in achieve good properties, response stimuli such as light, sound, electricity resistance. Conclusively, provide a systematic summary findings (crosslinking methods) an outlook on long-lasting effects, broader spectrum, diversified forms, future development prospects field.

Язык: Английский

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Gelatin Methacryloyl‐Based Tactile Sensors for Medical Wearables

Advanced Functional Materials, Год журнала: 2020, Номер 30(49)

Опубликована: Сен. 6, 2020

Abstract Gelatin methacryloyl (GelMA) is a widely used hydrogel with skin‐derived gelatin acting as the main constituent. However, GelMA has not been in development of wearable biosensors, which are emerging devices that enable personalized healthcare monitoring. This work highlights potential for biosensing applications by demonstrating fully solution‐processable and transparent capacitive tactile sensor microstructured core dielectric layer. A robust chemical bonding reliable encapsulation approach introduced to overcome detachment water‐evaporation issues biosensors. The resultant shows high‐pressure sensitivity 0.19 kPa −1 one order magnitude lower limit detection (0.1 Pa) compared previous pressure sensors owing its excellent mechanical electrical properties (dielectric constant). Furthermore, it durability up 3000 test cycles because tough bonding, long‐term stability 3 days due inclusion an layer, prevents water evaporation (80% content). Successful monitoring various human physiological motion signals demonstrates these applications.

Язык: Английский

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Highly stretchable and self-healing cellulose nanofiber-mediated conductive hydrogel towards strain sensing application

Journal of Colloid and Interface Science, Год журнала: 2021, Номер 597, С. 171 - 181

Опубликована: Апрель 5, 2021

Язык: Английский

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Highly Breathable and Stretchable Strain Sensors with Insensitive Response to Pressure and Bending

Advanced Functional Materials, Год журнала: 2021, Номер 31(14)

Опубликована: Янв. 25, 2021

Abstract Wearable tensile strain sensors have aroused substantial attention on account of their exciting applications in rebuilding tactile inputs human and intelligent robots. Conventional such devices, however, face the dilemma both sensitive response to pressure bending stimulations, poor breathability for wearing comfort. In this paper, a breathable, insensitive sensor is reported, which presents fascinating properties including high sensitivity remarkable linearity (gauge factor 49.5 0–100%, R 2 = 99.5%), wide sensing range (up 200%), as well superior permeability moisture, air, water vapor. On other hand, it exhibits negligible wide‐range (0–100 kPa) (0–75%) inputs. This work provides new route achieving comfortable, high‐performance, anti‐jamming sensors.

Язык: Английский

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