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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A stretchable, environmentally tolerant, and photoactive liquid metal/MXene hydrogel for high performance temperature monitoring, human motion detection and self-powered application

Nano Energy, Journal Year: 2023, Volume and Issue: 117, P. 108875 - 108875

Published: Sept. 6, 2023

Language: Английский

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Metal‐Organic Framework Reinforced Highly Stretchable and Durable Conductive Hydrogel‐Based Triboelectric Nanogenerator for Biomotion Sensing and Wearable Human‐Machine Interfaces

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(48)

Published: July 17, 2023

Abstract Flexible triboelectric nanogenerators (TENGs) with multifunctional sensing capabilities offer an elegant solution to address the growing energy supply challenges for wearable smart electronics. Herein, a highly stretchable and durable electrode TENG is developed using ZIF‐8 as reinforcing nanofiller in hydrogel LiCl electrolyte. nanocrystals improve hydrogel's mechanical properties by forming hydrogen bonds copolymer chains, resulting 2.7 times greater stretchability than pure hydrogel. The encapsulated microstructured silicone layers that act materials prevent water loss from Optimized ZIF‐8‐based electrodes enhance output performance of through dynamic balance electric double (EDLs) during contact electrification. Thus, as‐fabricated delivers excellent power density 3.47 Wm – 2 , which 3.2 higher hydrogel‐based TENG. can scavenge biomechanical even at subzero temperatures small electronics serve self‐powered pressure sensors human‐machine interfaces (HMIs). nanocomposite also function biomotion sensor, detecting body movements high sensitivity. This study demonstrates significant potential utilizing reinforced TENGs harvesting sensor technology.

Language: Английский

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Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(24), P. 29413 - 29424

Published: June 6, 2023

Flexible strain sensors based on self-adhesive, high-tensile, super-sensitive conductive hydrogels have promising application in human-computer interaction and motion monitoring. Traditional difficulty balancing mechanical strength, detection function, sensitivity, which brings challenges to their practical applications. In this work, the double network hydrogel composed of polyacrylamide (PAM) sodium alginate (SA) was prepared, MXene sucrose were used as materials reinforcing materials, respectively. Sucrose can effectively enhance performance improve ability withstand harsh conditions. The sensor has excellent tensile properties (strain >2500%), high sensitivity with a gauge factor 3.76 at 1400% strain, reliable repeatability, self-adhesion, anti-freezing ability. Highly sensitive be assembled into that distinguish between various strong or subtle movements human body, such joint flexion throat vibration. addition, applied handwriting recognition English letters by using fully convolutional (FCN) algorithm achieved accuracy 98.1% for recognition. as-prepared broad prospect human-machine interaction, provides great potential flexible wearable devices.

Language: Английский

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Super‐Stretchable, Anti‐Freezing, Anti‐Drying Organogel Ionic Conductor for Multi‐Mode Flexible Electronics

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(41)

Published: June 9, 2023

Abstract Due to their intrinsic flexibility, tunable conductivity, multiple stimulus‐response, and self‐healing ability, ionic conductive hydrogels have drawn significant attention in flexible/wearable electronics. However, challenges remain because traditional inevitably faced the problems of losing flexibility conductivity inner water loss when exposed ambient environment. Besides, inside hydrogel will freeze at icing temperatures, making device hard fragile. As a promising alternative, organogels attracted wide they can, some extent, overcome above drawbacks. Herein, kind organogel conductor (MOIC) by self‐polymerization reaction is involved, which super stretchable, anti‐drying, anti‐freezing. Meanwhile, it can still maintain high mechanical stability after alternately loading/unloading strain 600% for 600 s (1800 cycles). Using this MOIC, high‐performance triboelectric nanogenerator (TENG) constructed (MOIC‐TENG) harvest small energy even MOIC electrode underwent an extremely low temperature. In addition, multifunctional sensors (strain sensor, piezoresistive tactile sensor) are realized monitor human motions real time, recognize different materials effect. This study demonstrates candidate material electronics such as electronic skin, flexible sensors, human‐machine interfaces.

Language: Английский

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Fully Polymeric Conductive Hydrogels with Low Hysteresis and High Toughness as Multi‐Responsive and Self‐Powered Wearable Sensors

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: April 22, 2024

Abstract High mechanical strength, excellent toughness, low hysteresis, and robust resilience are of great importance for stretchable conductive hydrogels (CHs) to heighten their reliabilities self‐powered sensing applications. However, it still remains challenging simultaneously obtain the mutually exclusive performances. Herein, an intrinsically adhesive hydrogel is fabricated by one‐step radical polymerization acrylamide (AAm), three hydroxy groups together clustered‐N‐[tris(hydroxymethyl)methyl]acrylamide (THMA), cationic 1‐Butyl‐3‐Vinylimidazolium Bromide (ILs) dissolved in core‐shell structurally dispersed PEDOT:PSS (PP) solution. Owing abundant clustered hydrogen bonds, electrostatic interactions between PILs chains anionic PSS shells, polymer chain entanglements, CHs feature superior properties with a high tensile strength (0.25 MPa), fracture strain (1015%), toughness (1.22 MJ m ‐3 ), energy 36.5 kJ ‐2 extremely hysteresis (5%), display fatigue resistance. As result, indicate gauge factor up 10.46, broad range (1‐900%) pressure (0.05‐100 kPa), fast responsive rate, thus qualifying monitoring reliably accurately large tiny human movements daily life. Moreover, hydrogel‐assembled triboelectric nanogenerators (TENGs) exhibit stable electrical output performances, which greatly promising flexible wearable electronics.

Language: Английский

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Wearable Sensor Based on a Tough Conductive Gel for Real-Time and Remote Human Motion Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(9), P. 11957 - 11972

Published: Feb. 23, 2024

The usage of a conductive hydrogel in wearable sensors has been thoroughly researched recently. Nonetheless, hydrogel-based cannot simultaneously have excellent mechanical property, high sensitivity, comfortable wearability, and rapid self-healing performance, which result poor durability reusability. Herein, robust derived from one-pot polymerization subsequent solvent replacement is developed as sensor. Owing to the reversible hydrogen bonds cross-linked between polymer chains clay nanosheets, resulting sensor exhibits outstanding flexibility, self-repairing, fatigue resistance performances. embedding graphene oxide nanosheets offers an enhanced network easy release target position through remote irradiation, while Li+ ions incorporated by endow with low detection limit (sensing strain: 1%), conductivity (4.3 S m–1) sensitivity (gauge factor: 3.04), good freezing resistance, water retention. Therefore, fabricated suitable monitor small large human motions on site remotely under subzero (−54 °C) or room temperature, indicating lots promising applications human-motion monitoring, information encryption identification, electronic skins.

Language: Английский

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Antifreeze protein-based ultrastretchable and highly sensitive hydrogel for human-machine interaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 150775 - 150775

Published: March 28, 2024

Language: Английский

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Self-powered, self-healing, and anti-freezing triboelectric sensors for violation detection in sport events

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109276 - 109276

Published: Jan. 11, 2024

Language: Английский

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Multifunctional Nano‐Conductive Hydrogels With High Mechanical Strength, Toughness and Fatigue Resistance as Self‐Powered Wearable Sensors and Deep Learning‐Assisted Recognition System

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

Published: Sept. 20, 2024

Abstract High mechanical strength, toughness, and fatigue resistance are essential to improve the reliability of conductive hydrogels for self‐powered sensing. However, achieving mutually exclusive properties simultaneously remains challenging. Hence, a novel directed interlocking strategy based on topological network structure training is proposed construct tough by optimizing modulating orientation molecular chains. Combining Zn 2+ crosslinked cellulose nanofibers (CNFs) polyacrylamide‐poly(vinyl alcohol) double‐network, unique interlocked‐network exhibits an enhanced toughening effect due hydrogen bonding metal‐ligand interactions. The aligned nanocrystalline domains achieved further contribute increase in toughness thresholds. This innovative approach synergistically enhances nano‐conductive hydrogel, maximum tensile strength 4.98 MPa 48 MJ m −3 . Notably, CNFs template with anchored polyaniline, when oriented through training, forms directional pathway, which significantly power output performance. Besides, motion recognition system sensing device designed assistance deep learning techniques accurately identify human behaviors. work showcases potentially transformative flexible electronic material systems intelligent systems.

Language: Английский

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