Poly(vinyl alcohol)/polyacrylamide double‐network ionic conductive hydrogel strain sensor with high sensitivity and high elongation at break

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 62(20), P. 4599 - 4611

Published: July 19, 2024

Abstract As a soft material with biocompatibility and stimulation response, ionic conductive hydrogel‐based wearable strain sensors show great potential across wide spectrum of engineering disciplines, but their mechanical toughness is limited in practical applications. In this study, freeze‐thawing techniques were utilized to fabricate double‐network hydrogels poly(vinyl alcohol)/polyacrylamide (PVA/PAM) both covalent physical cross‐linking networks. These demonstrate excellent performance, an elongation at break 2253% tensile strength 268.2 kPa. Simultaneously, they also display high sensitivity (Gage factor, GF = 2.32 0%–200% strain), achieve rapid response time 368 ms without the addition extra fillers or ions, stable signal transmission even after multiple cycles, fast human motion detection.

Language: Английский

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Multifunctional, High-Strength Electronic Skin Based on the Natural Sheepskin Fiber Network for Multifaceted Human Health Monitoring and Management

Biomacromolecules, Journal Year: 2024, Volume and Issue: 25(8), P. 5359 - 5373

Published: July 24, 2024

Inspired by the animal skin fiber network, we developed an electronic (e-skin) utilizing natural sheepskin as primary substrate. This innovative design addresses limitations of conventional e-skins, including inadequate mechanical strength, overly complex artificial network construction, and limited health monitoring capabilities. e-skin successfully retains structure properties while exhibiting exceptional strength (with a breaking 4.01 MPa) high elongation at break 304.8%). Moreover, it possesses various desirable attributes such electrical conductivity, antibacterial properties, biocompatibility, environmental stability. In addition, this has advantage diverse data collection (joint movement, bioelectricity, foot detection, speech disorder communication systems). Therefore, breaks traditional construction strategy single-mode application is expected to become ideal material for building smart sensor devices.

Language: Английский

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Carbon Quantum Dot-Functionalized Dermis-Derived Transparent Electronic Skin for Multimodal Human Motion Signal Monitoring and Construction of Self-Powered Triboelectric Nanogenerator

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(35), P. 46771 - 46788

Published: Aug. 21, 2024

Electronic skin (e-skin) is considered as a highly promising interface for human-computer interaction systems and wearable electronic devices. Through elaborate design assembly of various materials, it possesses multiple characteristics similar to human skin, including remarkable flexibility, stretchability, sensitivity temperature humidity, biocompatibility, efficient interfacial ion/electron transport capabilities. Here, we innovatively integrate multifunctional carbon quantum dots (CQDs), which exhibit conductivity, antibacterial properties, ultraviolet absorption, fluorescence emission, with poly(acrylic acid) glycerin (Gly) into three-dimensional network structure natural goatskin collagen fibers. top-down strategy enhanced by hydrogen bond reconstruction, successfully fabricated novel transparent e-skin (PAC-eSkin). This exhibited significant tensile properties (4.94 MPa strength 263.42% maximum breaking elongation), while also possessing Young's modulus (2.32 MPa). It noteworthy that the functionalized CQDs used was derived from discarded goat hair, addition Gly gave PAC-eSkin excellent antifreezing moisturizing properties. Due presence ultrasmall CQDs, creates channels within PAC-eSkin, could rapidly sense motion physiological signals (with gauge factor (GF) 1.88). Furthermore, had potential replace traditional electrode patches real-time monitoring electrocardiogram, electromyogram, electrooculogram signals, higher SNR (signal-to-noise ratio) 25.1 dB. Additionally, customizable size shape offer vast possibilities construction single-electrode triboelectric nanogenerator systems. We have reason believe development this based on CQDs-functionalized dermal matrices can pave new way innovations in human–computer interfaces their sensing application diverse scenarios.

Language: Английский

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Highly robust, self-adhesive, self-healing, pH-responsive, cytocompatible and degradable collagen/PVA/tannin-based conductive hydrogel sensor for motion-monitoring

Polymer, Journal Year: 2024, Volume and Issue: 308, P. 127365 - 127365

Published: July 6, 2024

Language: Английский

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Super Tough Anti‐freezing and Antibacterial Hydrogel With Multi‐crosslinked Network for Flexible Strain Sensor

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Addressing the diverse environmental demands for electronic material performance, design of a multifunctional ionic conductive hydrogel with mechanical flexibility, anti‐freezing capability, and antibacterial characteristics represents an optimal solution. Leveraging Dead Sea effect strong hydrogen bonding, this study exploits CaCl 2 abundant hydroxyl groups in phytic acid (PA) to induce chain entanglements, thereby constructing complex, multi‐crosslinked network. Furthermore, PA ternary solvent systems (CaCl /Glycerol/H O) synergistically impart excellent strength, toughness (with tensile strength 8.93 MPa, elongation at break 859.93%, 39.92 MJ m −3 ), high electrical conductivity, antifreeze properties, strain sensitivity (gauge factor up 2.10) hydrogels. Remarkably, structure maintains stability even after undergoing 6000 loading‐unloading cycles, demonstrating its outstanding fatigue resistance. Upon receiving external stimuli, exhibits response time 126 ms, making it ideal dynamic monitoring human motion signals. This offers novel insight into potential application hydrogels as flexible sensors challenging environments.

Language: Английский

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Multifunctional Biomimetic e-Skin Constructed In Situ on Tanned Sheep Leather as a Multimodal Sensor for the Monitoring of Motion and Health

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(32), P. 14176 - 14189

Published: July 30, 2024

Bionic electronic skin, with its integrated biological functions, is capable of sensing and responding to external stimuli, potentially surpassing the ideal flexibility natural skin in certain aspects. Most current preparation strategies employ "bottom-up" approach, using various monomers or polymer materials construct artificial networks through physical chemical cross-linking, leading issues complexity limited performance. In this work, we adopted a "top-down" strategy, which collagen fiber network aluminum-tanned sheepskin was utilized as scaffold load itaconic acid (IA) hydroxyethyl acrylate (HEA). The subsequent situ polymerization IA HEA led formation poly(itaconic acid-co-hydroxyethyl acrylate) (P(IA-HEA)) filling among skeleton, results successful fabrication high-strength bionic based on (LIHEZ). advantage approach that it can retain structure properties give resulting LIHEZ multiple functions (e.g., electrical conductivity, adhesion, bacteriostasis, biocompatibility, environmental stability), thereby replicating even performance animal skin. demonstrated sensitive stimulus responsiveness durability could serve multimodal sensors (strain, temperature, humidity, bioelectricity) efficiently monitor human movements, physiological signals, changes temperature humidity. This diversified data collection provides reliable assurance for monitoring health. present construction method substrate not only breaks conventional single applications but also new insights selection flexible device substrates, promising be next-generation material constructing intelligent

Language: Английский

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Skin-Inspired MXene-Based Polyvinyl Alcohol/Gelatin Organic Hydrogel with Good Anti-Drying, Anti-Swelling Properties and High Sensitivity

Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116231 - 116231

Published: Jan. 1, 2025

Language: Английский

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Dual-Network Conductive Hydrogels with Self-Healing, Ultrasensitive, and Antibacterial Activity toward Multifunctional Flexible Strain Sensor

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(12), P. 7020 - 7035

Published: April 23, 2024

Flexible strain sensors based on hydrogels have shown promising application prospects in artificial tissue and body deformation monitoring. However, hydrogel-based with ideal structural performance, self-healing ability, detection, adhesion remain challenging. Herein, a dual-network hydrogel (PG-B-T) flexible sensor poly(vinyl alcohol) (PVA) gelatin was developed, which were multidynamically cross-linked via the one-pot approach. The noncovalent bonds of by tannic acid (TA) could form first network impart stability antibacterial while second constructed reversible borate ester PVA borax showed capability electric conductivity. As such, prepared PG-B-T demonstrated exceptional ductility (strain >1000%) high sensitivity (GF = 2.51). In air or an underwater environment, can perform wide working range, such as capability, electrical properties, sensing properties. Meanwhile, hydrogen enabled strong to some classic substrates, not only allowing monitor movements detect vocal vibration signals but also achieving information transmission Morse code finger movement. Consequently, this work provided significant strategy for developing multifunctional strain-sensitive that conveniently effectively motion variation.

Language: Английский

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Dual design strategy for carboxymethyl cellulose-polyaniline composite hydrogels as super-sensitive amphibious sensors

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: unknown, P. 135630 - 135630

Published: Sept. 1, 2024

Language: Английский

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Ca2+/ethanol driven in-situ integration of tough, antifreezing and conductive silk fibroin/polyacrylamide hydrogels for wearable sensors and electronic skin

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154745 - 154745

Published: Aug. 23, 2024

Language: Английский

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