Hydrogel‐Based Flexible Electronics

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(14)

Published: Aug. 29, 2022

Abstract Flexible electronics is an emerging field of research involving multiple disciplines, which include but not limited to physics, chemistry, materials science, electronic engineering, and biology. However, the broad applications flexible are still restricted due several limitations, including high Young's modulus, poor biocompatibility, responsiveness. Innovative aiming for overcoming these drawbacks boost its practical application highly desirable. Hydrogel a class 3D crosslinked hydrated polymer networks, exceptional material properties render it as promising candidate next generation electronics. Here, latest methods synthesizing advanced functional hydrogels state‐of‐art hydrogel‐based in various fields reviewed. More importantly, correlation between hydrogel device performance discussed here, have better understanding development by using environmentally responsive hydrogels. Last, perspectives on current challenges future directions multifunctional provided.

Language: Английский

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Ultra‐Sensitive, Deformable, and Transparent Triboelectric Tactile Sensor Based on Micro‐Pyramid Patterned Ionic Hydrogel for Interactive Human–Machine Interfaces

Advanced Science, Journal Year: 2022, Volume and Issue: 9(10)

Published: Jan. 31, 2022

Abstract Rapid advances in wearable electronics and mechno‐sensational human–machine interfaces impose great challenges developing flexible deformable tactile sensors with high efficiency, ultra‐sensitivity, environment‐tolerance, self‐sustainability. Herein, a hydrogel sensor (THS) based on micro‐pyramid‐patterned double‐network (DN) ionic organohydrogels to detect subtle pressure changes by measuring the variations of triboelectric output signal without an external power supply is reported. By first time pyramidal‐patterned fabrication method laminated polydimethylsiloxane (PDMS) encapsulation process, self‐powered THS shows advantages remarkable flexibility, good transparency (≈85%), excellent sensing performance, including extraordinary sensitivity (45.97 mV Pa −1 ), fast response (≈20 ms), very low limit detection (50 Pa) as well stability (36 000 cycles). Moreover, LiBr immersion treatment method, possesses long‐term hyper anti‐freezing anti‐dehydrating properties, broad environmental tolerance (−20 60 °C), instantaneous peak density 20 µW cm −2 , providing reliable contact outputs different materials detecting slight human motions. integrating acquisition/process circuit, self‐power ability utilized switching button control electric appliances robotic hands simulating finger gestures, offering its potentials for multi‐functional electronic applications.

Language: Английский

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

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(40)

Published: July 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.

Language: Английский

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Stretchable freezing-tolerant triboelectric nanogenerator and strain sensor based on transparent, long-term stable, and highly conductive gelatin-based organohydrogel

Nano Energy, Journal Year: 2022, Volume and Issue: 95, P. 106967 - 106967

Published: Jan. 17, 2022

Language: Английский

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Ultrastretchable, Self-Healing Conductive Hydrogel-Based Triboelectric Nanogenerators for Human–Computer Interaction

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(4), P. 5128 - 5138

Published: Jan. 19, 2023

The rapid development of wearable electronic devices and virtual reality technology has revived interest in flexible sensing control devices. Here, we report an ionic hydrogel (PTSM) prepared from polypropylene amine (PAM), tannic acid (TA), sodium alginate (SA), MXene. Based on the multiple weak H-bonds, this exhibits excellent stretchability (strain >4600%), adhesion, self-healing. introduction MXene nanosheets endows sensor with a high gauge factor (GF) 6.6. Meanwhile, it also enables triboelectric nanogenerators (PTSM-TENGs) fabricated silicone rubber-encapsulated hydrogels to have energy harvesting efficiency, instantaneous output power density 54.24 mW/m2. We build glove-based human-computer interaction (HMI) system using PTSM-TENGs. multidimensional signal features PTSM-TENG are extracted analyzed by HMI system, functions gesture visualization robot hand realized. In addition, signals can be used for object recognition help machine learning techniques. glove based achieves classification five objects through contact, accuracy rate 98.7%. Therefore, strain sensors broad application prospects man-machine interface, intelligent systems, auxiliary other fields due their stretchable self-healing performance.

Language: Английский

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Environmentally Tough and Stretchable MXene Organohydrogel with Exceptionally Enhanced Electromagnetic Interference Shielding Performances

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: March 21, 2022

Conductive hydrogels have potential applications in shielding electromagnetic (EM) radiation interference deformable and wearable electronic devices, but usually suffer from poor environmental stability stretching-induced performance degradation. Although organohydrogels can improve the of materials, their development is at expense reducing electrical conductivity thus weakening EM ability. Here, a MXene organohydrogel prepared which composed network for electron conduction, binary solvent channels ion abundant solvent-polymer-MXene interfaces wave scattering. This possesses excellent anti-drying ability, low-temperature tolerance, stretchability, shape adaptability, adhesion rapid self-healing Two effective strategies been proposed to solve problems current materials. By reasonably controlling content glycerol-water ratio gel, exhibit exceptionally enhanced performances compared hydrogel due increased physical cross-linking density gel. Moreover, shows attractive stretching-enhanced effectiveness, caused by connection parallel arrangement nanosheets. well-designed has devices.

Language: Английский

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From Glutinous‐Rice‐Inspired Adhesive Organohydrogels to Flexible Electronic Devices Toward Wearable Sensing, Power Supply, and Energy Storage

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(1)

Published: Oct. 1, 2021

Abstract Flexible electronic devices (FEDs) based on hydrogels are attracting increasing interest, but the fabrication of for FEDs with adhesiveness and high robustness in harsh‐temperature conditions long‐term use remains a challenge. Herein, glutinous‐rice‐inspired adhesive organohydrogels developed by introducing amylopectin into copolymer network through “one‐pot” crosslinking procedure glycerol–water mixed solvent containing potassium chloride as conductive ingredient. The exhibit excellent transparency (>90%), conductivity, stretchability, tensile strength, adhesiveness, anti‐freezing property, moisture retention ability. wearable strain sensor assembled from achieves wide working range, sensitivity (gauge factor: 8.82), low response time, reversibility, properly responds long‐time storage (90 days). is further integrated Bluetooth transmitter receiver fabricating wireless sensors. Notably, sandwich‐structured capacitive pressure reliefs electrodes records new gauge factor 9.43 kPa −1 detection limit, outstanding reversibility. Furthermore, detachable durable batteries all‐in‐one supercapacitors also fabricated utilizing electrolytes. Overall, this work offers strategy to fabricate robust toward sensing, power supply, energy storage.

Language: Английский

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Highly Transparent, Stretchable, and Self-Healable Ionogel for Multifunctional Sensors, Triboelectric Nanogenerator, and Wearable Fibrous Electronics

Advanced Fiber Materials, Journal Year: 2021, Volume and Issue: 4(1), P. 98 - 107

Published: June 28, 2021

Language: Английский

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Fatigue‐Resistant Conducting Polymer Hydrogels as Strain Sensor for Underwater Robotics

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(42)

Published: July 14, 2023

Abstract Conducting polymer hydrogels are widely used as strain sensors in light of their distinct skin‐like softness, sensitivity, and environmental adaptiveness the fields wearable devices, soft robots, human‐machine interface. However, mechanical electrical properties existing conducting hydrogels, especially fatigue‐resistance sensing robustness during long‐term application, unsatisfactory, which severely hamper practical utilities. Herein, a strategy to fabricate with anisotropic structures mechanics is presented through combined freeze‐casting salting‐out process. The as‐fabricated exhibit high fatigue threshold (>300 J m −2 ), low Young's modulus (≈100 kPa), well (over 10 000 cycles). Such superior performance enables application monitor real‐time movement underwater robotics. design fabrication for reported this study may open up an enticing avenue functional materials electronics

Language: Английский

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Design of ultra-stretchable, highly adhesive and self-healable hydrogels via tannic acid-enabled dynamic interactions

Materials Horizons, Journal Year: 2021, Volume and Issue: 8(12), P. 3409 - 3416

Published: Jan. 1, 2021

By leveraging tannic-acid-enabled dynamic interactions, we designed an ionic hydrogel with boosted bulk and interfacial properties such as ultra-stretchability, remarkable self-healing capability robust adhesion.

Language: Английский

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