Mechanical robust and highly conductive composite hydrogel reinforced by a combination of cellulose nanofibrils/polypyrrole toward high-performance strain sensor

Composites Part B Engineering, Journal Year: 2023, Volume and Issue: 266, P. 111022 - 111022

Published: Sept. 24, 2023

Language: Английский

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Guar gum reinforced conductive hydrogel for strain sensing and electronic devices

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 246, P. 125666 - 125666

Published: July 3, 2023

Language: Английский

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6-amino caproic acid regulated mechanical performance of ionically conductive ultra-stretchable hydrogels for flexible strain and epidermis sensors

Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 356, P. 114363 - 114363

Published: April 11, 2023

Language: Английский

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Hydrophobically associated ionic conductive hydrogels as strain, pressure, and an electronic sensor for human motions detection

Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 362, P. 114618 - 114618

Published: Aug. 25, 2023

Language: Английский

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Transparent, High Stretchable, Environmental Tolerance, and Excellent Sensitivity Hydrogel for Flexible Sensors and Capacitive Pens

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(37), P. 44280 - 44293

Published: Sept. 12, 2023

The prospect of ionic conductive hydrogels in multifunctional sensors has generated widespread scientific interest. new generation flexible materials should be combined with superior mechanical properties, high conductivity, transparency, sensitivity, good self-restoring fatigue and other characteristics, while the current are difficult to meet these requirements. Herein, we prepared poly(acrylamide-acrylic acid) (P(AM-AA))/gelatin/glycerol-Al3+ (PG1G2A) conducting hydrogel by one-pot polymerization under UV light. PG1G2A had tensile strength (539.18 kPa), excellent property (1412.96%), fast self-recovery resistance, transparency (>80%), moisturizing, antifreezing/drying properties. In addition, hydrogel-based strain sensor can respond stimulation generate accurate, stable, recyclable electrical signals, sensitivity (GF 5.81). could used as wearable devices for monitoring multiple subtle movements different body parts at temperatures. Interestingly, capacitive pen embedded mold write draw on screen a phone or tablet. This shows broad application prospects E-skin, motion monitoring, human-computer interaction extreme environments.

Language: Английский

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SENSING MECHANISM AND APPLICATION OF MECHANICAL STRAIN SENSOR: A MINI-REVIEW

Facta Universitatis Series Mechanical Engineering, Journal Year: 2023, Volume and Issue: 21(4), P. 751 - 751

Published: Nov. 2, 2023

This study reviews the potential of flexible strain sensors based on nanomaterials such as carbon nanotubes (CNTs), graphene, and metal nanowires (NWs). These have excellent flexibility, conductivity, mechanical properties, which enable them to be integrated into clothing or attached skin for real-time monitoring various activities. However, main challenge is balancing high stretchability sensitivity. paper explains basic concept that can convert deformation electrical signals. Moreover, this focuses simple, flexible, stretchable resistive capacitive sensors. It also discusses important factors in choosing materials fabrication methods, emphasizing crucial role suitable polymers high-performance sensing. processes, mechanisms, performance, applications detail. analyzes key aspects, sensitivity, stretchability, linearity, response time, durability. review provides useful insights current status prospects wearable technology human–machine interfaces.

Language: Английский

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Highly Flexible Strain Sensors Based on CNT-Reinforced Ecoflex Silicone Rubber for Wireless Facemask Breathing Monitoring via Bluetooth

ACS Applied Polymer Materials, Journal Year: 2023, Volume and Issue: 5(10), P. 8589 - 8599

Published: Sept. 5, 2023

Highly stretchable strain sensors based on carbon nanotube (CNT)-reinforced Ecoflex silicone rubber are developed for breathing monitoring purposes. The addition of CNTs promotes an improvement in electrical conductivity and mechanical properties (Young's modulus tensile strength) due to its good dispersion Ecoflex. evaluation response, both compression conditions, indicates a wide detection range ultrasensitive response at high levels, reaching gauge factor around 104 70% or 105 300% 0.3 0.7 wt % CNT-reinforced sensors, respectively. They show quite stable under 2000 cycling loads different levels frequencies. Moreover, the recovery times milliseconds (∼600 ∼800 ms, respectively). Finally, proof-of-concept wireless facemask was carried out with Bluetooth Low Energy technology platform that has been acquire, filter, visualize, store signal. With this, respiration rate can be unequivocally monitored as well difference between inspiration expiration. Thus, this type trial is proposed breath medical analysis, emergency teams, first aid.

Language: Английский

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Bimetallic-MOF Tunable Conductive Hydrogels to Unleash High Stretchability and Sensitivity for Highly Responsive Flexible Sensors and Artificial Skin Applications

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(12), P. 7288 - 7300

Published: June 6, 2024

Metal–organic frameworks (MOFs) are widely applied in various fields, including energy storage, drug delivery, wastewater treatment, and much more. However, their use hydrogels is limited due to low dispersion which causes agglomeration the hydrogel network many properties of sacrifices. Similarly, conductive have emerged as a promising material for skin-like sensors excellent biocompatibility mechanical flexibility. like MOFs, also face challenges such stretchability, toughness, susceptibility fatigue, resulting sensing range large response time-reduced durability sensors. In this study, highly stretchable, tough, antifatigue composite poly(dodecyl methacrylate-acrylamide-2-(acryloyloxy)ethyl trimethylammonium chloride) bimetallic metal–organic framework [p(DA-AM-AETAC)BM-MOF] was developed by integrating BM-MOFs into it. To achieve uniform within network, positively charged surfactant, ethyl hexadecyl dimethylammonium bromide, used. It facilitates formation hydrophobic interactions between matrix surface BM-MOFs. Furthermore, it can interact with surfactant polymer chains through physical interactions, significantly enhancing hydrogel. The BM-MOF-based exhibited impressive stretchability (1588%) toughness (537 kJ m–3), along exceptional properties. Moreover, demonstrated high conductivity 1.3 S/m tensile strain sensitivity ranging from 0.5 700% gauge factor 14.8 at response–recovery 195–145 ms. p(DA-AM-AETAC)BM-MOF displayed sensitive, reliable, repetitive detection wide human activities, wrist elbow rotation, finger bending, swallowing motion, speaking, well handwriting drawing. monitor pressure mimic skin. This highlights potential wearable strain, pressure, artificial skin flexible devices.

Language: Английский

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Ultra-Stretchable, Adhesive, Conductive, and Antifreezing Multinetwork Borate Ester-Based Hydrogel for Wearable Strain Sensor and VOC Absorption

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(10), P. 5322 - 5332

Published: Oct. 15, 2024

Hydrogels based on borate ester bonds exhibit remarkable tensile strength and self-healing ability, which make them a promising material for various biological research strain sensor applications. However, in order to meet the practical application of hydrogel sensors, they must also show high conductivity, frost resistance, proper adhesion, is still continuous challenge. Herein, triple network was prepared using poly(vinyl alcohol) (PVA) as first network, ethylene imine polymer (PEI) second poly(acrylamide-

Language: Английский

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An ultralow hysteresis zwitterionic hydrogel crosslinked by functionalized graphene oxide quantum dots for dual-responsive flexible wearable sensors

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149282 - 149282

Published: Feb. 5, 2024

Language: Английский

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