Recent Progress in Essential Functions of Soft Electronic Skin

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(42)

Published: July 20, 2021

Abstract Inspired by the human skin, electronic skins (e‐skins) composed of various flexible sensors, such as strain sensor, pressure shear force temperature and humility delicate circuits, are emerged to mimic sensing functions skins. In this review, strategies realize versatile functionalities natural skin‐like e‐skins, including strain‐, pressure‐, force‐, temperature‐ humility‐sensing abilities, well self‐healing ability other summarized. Some representative examples high‐performance e‐skins their applications outlined discussed. Finally, outlook future is presented.

Language: Английский

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Recent Advances in Multiresponsive Flexible Sensors towards E‐skin: A Delicate Design for Versatile Sensing

Small, Journal Year: 2021, Volume and Issue: 18(7)

Published: Nov. 25, 2021

Abstract Multiresponsive flexile sensors with strain, temperature, humidity, and other sensing abilities serving as real electronic skin (e‐skin) have manifested great application potential in flexible electronics, artificial intelligence (AI), Internet of Things (IoT). Although numerous sole function already been reported since the concept e‐skin, that mimics features human skin, was proposed about a decade ago, ones more capacities new emergences are urgently demanded. However, highly integrated sensitive multiresponsive functions becoming big thrust for detection body motions, physiological signals (e.g., blood pressure, electrocardiograms (ECG), electromyograms (EMG), sweat, etc.) environmental stimuli light, magnetic field, volatile organic compounds (VOCs)), which vital to real‐time all‐round health monitoring management. Herein, this review summarizes design, manufacturing, presents future challenges fabricating these next‐generation e‐skin wearable electronics.

Language: Английский

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Highly tough, freezing-tolerant, healable and thermoplastic starch/poly(vinyl alcohol) organohydrogels for flexible electronic devices

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(34), P. 18406 - 18420

Published: Jan. 1, 2021

Herein, the preparation of a highly tough, freezing-tolerant, healable and thermoplastic starch/poly(vinyl alcohol) organohydrogel for flexible electronic devices is presented.

Language: Английский

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Multifunctional Organohydrogel with Ultralow‐Hysteresis, Ultrafast‐Response, and Whole‐Strain‐Range Linearity for Self‐Powered Sensors

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(15)

Published: Feb. 7, 2023

Abstract The conductive hydrogels always suffered from high internal friction, large hysteresis, and low capability of accurately predicting physical deformation, which seriously restricted their application in smart wearable devices. To address these problems, solvent molecules are directionally inserted into the polymer molecule chains via bridge effect to effectively reduce molecular friction. Moreover, swelling is also combined eliminate temporary entanglements hydrogel system. cooperation between swollen endows prepared polyacrylamide (PAM)/laponite/H 3 BO /ethylene glycol (Eg) organohydrogel (PLBOH) ultralow hysteresis (1.38%, ε = 100%), ultrafast response (≈10 ms), linearity whole‐strain‐range ( R 2 0.996) with a great sensitivity GF 2.68 at strain range 0–750%). Meanwhile, PL 10 B 30 OH exhibits long‐term stability, excellent stretchability, dissipated energy. Furthermore, assembled triboelectric nanogenerator (TENG) displays an outstanding energy harvesting performance output voltage 200 V size 20 mm × mm. sensors can monitor small facial expressions human movements, indicating tremendous applications self‐powered intelligent flexible electronics under harsh environmental conditions.

Language: Английский

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High toughness multifunctional organic hydrogels for flexible strain and temperature sensor

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(40), P. 23243 - 23255

Published: Jan. 1, 2021

A wearable multifunctional sensor was proposed, consisting of strain and temperature sensors, both which were fabricated by a rationally designed toughness conductive organohydrogel.

Language: Английский

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Porous graphene foam composite-based dual-mode sensors for underwater temperature and subtle motion detection

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 444, P. 136631 - 136631

Published: April 28, 2022

Language: Английский

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Environment tolerant, adaptable and stretchable organohydrogels: preparation, optimization, and applications

Materials Horizons, Journal Year: 2022, Volume and Issue: 9(5), P. 1356 - 1386

Published: Jan. 1, 2022

Organohydrogels are attractive for constructing various flexible devices with good environmental tolerance and smart materials. Their significant developments in preparation, performance optimization application systematically reviewed.

Language: Английский

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Adhesive Ionohydrogels Based on Ionic Liquid/Water Binary Solvents with Freezing Tolerance for Flexible Ionotronic Devices

Chemistry of Materials, Journal Year: 2022, Volume and Issue: 34(3), P. 1065 - 1077

Published: Jan. 21, 2022

Ionic hydrogels hold substantial promise as soft materials for achieving versatile wearable ionotronics due to the integrated merits of appropriate mechanical properties, excellent conductivity, and good conformability. However, overcoming freezing at subzero temperatures hindering evaporation water are still huge challenges ionic hydrogels. Herein, a dual-cross-linked ionohydrogel was designed using Al3+ cross-link with polymer network through dynamic metal coordination bonds in liquid (IL) binary solvent system, allowing properties (∼1 MPa, ∼600%), transparency (>90%), high conductivity (∼12.40 mS cm–1), robust adhesion, along advantages superior antifreezing long-term antidehydration properties. These exceptional characteristics inspired us fabricate dual-responsive sensors, which could simultaneously detect human motion signals wide range change (from −30 40 °C) an impressive temperature coefficient resistance (TCR) value −0.035 −0.44 °C–1). More promisingly, benefiting from interfacial adhesion between poly(dimethylsiloxane) (PDMS) ionohydrogels, triboelectric nanogenerator assembled single-electrode mode that capable providing sustainable energy ionotronic devices even temperatures. This work opens up effective strategy design multifunctional ionohydrogel, enabling various applications into single device.

Language: Английский

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Environmentally Compatible Wearable Electronics Based on Ionically Conductive Organohydrogels for Health Monitoring with Thermal Compatibility, Anti‐Dehydration, and Underwater Adhesion

Small, Journal Year: 2021, Volume and Issue: 17(24)

Published: May 19, 2021

Abstract Hydrogel‐based electronics have found widespread applications in soft sensing and health monitoring because of their remarkable biocompatibility mechanical features similar to human skin. However, they are subjected potential challenges like structural failure, functional degradation, device delamination practical applications, especially facing extreme environmental conditions (e.g., abnormal temperature humidity). To address these, ionically conductive organohydrogel‐based developed, which can perform at subzero elevated temperatures (thermal compatibility) as well dehydrated hydrated environments (hydration for extended applications. More specifically, gelatin/poly(acrylic acid– N ‐hydrosuccinimide ester) (PAA–NHS ester)‐based ionic‐conductive organohydrogel is synthesized. By introducing a glycerol–water binary solvent system, the gel maintain softness wide range (from −80 60 °C). Besides, excellent conductivity achieved under various by soaking into lithium chloride anhydrous (LiCl) solution. Strong adhesion with skin, even water, be realized covalent bonds between NHS ester from amino groups The performances LiCl‐loaded PAA‐based (L‐PAA‐OH)‐based further demonstrated freezing high underwater conditions, unveiling promising prospects wearable conditions.

Language: Английский

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Strategies in the preparation of conductive polyvinyl alcohol hydrogels for applications in flexible strain sensors, flexible supercapacitors, and triboelectric nanogenerator sensors: an overview

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(6)

Published: Nov. 8, 2023

Language: Английский

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