Environmentally stable and multi-functional conductive gelatin/PVA/black wattle bark tannin based organogel as strain, temperature and bioelectric sensor for multi-mode sensing

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 680, P. 795 - 808

Published: Nov. 10, 2024

Language: Английский

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Nanocomposite Multi-Cross-Linked Hydrogels with High Strength, High Stretchability and High Conductivity for Multifunctional Wearable Sensors

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Conductive hydrogels have gained significant attention in advanced fields like wearable devices and soft robotics. However, the concurrent fabrication of sensors based on with both optimal mechanical properties high conductivity remains a challenge due to inherent brittleness conventional absence conductive pathways within them. Addressing this challenge, study successfully developed nanocomposite multicross-linked hydrogel strength, stretchability conductivity. The structure comprises chemically cross-linked polyacrylamide (PAM) network entangled gelatin chains induced by Hofmeister effect. Multiple hydrogen bonds between gelatin, PAM, water molecules, carboxylated multiwalled carbon nanotubes (c-MWCNTs), chitosan (CS) enhance hydrogel's crosslink density stability. exhibits remarkable performance, tensile strength 0.83 MPa, over 1558%, toughness 5.04 MJ/m3, alongside excellent fatigue resistance self-healing capabilities. also shows (5.09 S/m), sensitivity (GF = 1.91), durability (over 100 cycles), enabled formed c-MWCNTs inorganic salt electrolytes. prepared strain show wide range applicability reliability field human motion monitoring, where large movements joint bending (including elbow, wrist knee) small such as smiling swallowing can be accurately monitored. Moreover, it transmit information analyzing electrical signal changes, suggesting innovative potential for communication applications. Thus, holds great promise health monitoring remote communication.

Language: Английский

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Plant Template-Based Ultra-high Conductivity Multifunctional Silver Nanocomposite Transparent Hydrogel for Flexible Wearable Sensors

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Conductive hydrogels, widely recognized as flexible sensor materials for health monitoring, pose a research challenge in selecting suitable frameworks and designing multifunctional composites that balance conductivity, transparency, self-healing, mechanical properties. In this work, simple efficient plant-template method (corn husk) is used to generate textured hydrogel (PPA) with PEI PVA the transparent framework, without additional cross-linking agents. The resulting exhibits high conductivity (8.56 S/m), excellent transparency (94% @ 550 nm nontextured variant), remarkable stretchability (627.1%). Additionally, PPA self-healing capabilities, achieving maximum efficiency of 94.68%. To enhance AgNWs are applied surface using rod coating method, forming PPA@RCA 12.39 S/m. This improvement attributed interactions between silver-based nanomaterials (AgNWs, AgNPs), Li+, PEI/PVA framework PPA@RCA. wearable strain based on features gauge factor 3.35 instantaneous response characteristics (response time 195 ms), exhibiting exceptional sensitivity repeatability across diverse ranges external stimuli. Therefore, ultrahigh-conductive hydrogel, produced through strategy, demonstrates significant potential applications tablet capacitive pens, writing devices, smart wearables, monitoring.

Language: Английский

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Tough ion-electron conductive hydrogels with multi-crosslinked network for strain sensors

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128060 - 128060

Published: Jan. 1, 2025

Language: Английский

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Recent progress in stimulus-responsive hydrogel-based sensors for inflammation-associated diagnosis and surveillance

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 506, P. 159756 - 159756

Published: Jan. 1, 2025

Language: Английский

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DNA Bioinspired by Polyvinyl alcohol -MXene-Borax Hydrogel for Wearable Skin Sensors

Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116331 - 116331

Published: Feb. 1, 2025

Language: Английский

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Thermoresponsive and Strain-Sensitive Hydrogels with Inscribable Transparency-Based Dynamic Memory Behaviors

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Personal health management drives the development of intelligent hydrogel dressings, which pursue optical transparency, stretchability, and conductivity are required to perceive specific environmental stimuli by dynamic structure, shape, or color memory. However, incorporation weak perceptive elements black conductive polymers limits fabrication these hydrogels. Herein, we propose smart hydrogels with inscribable memorizing-forgetting transparency behavior in situ degrading immobilizing polydopamine-doped polypyrrole (PDA-PPy) nanodots into an interpenetrating poly(NIPAm-co-acrylic acid) copolymer/polyacrylamide (PNAc/PAM) network. These not only optically transparent (∼64.99%), stretchable (∼1052%), self-adhesive (21-105 kPa), highly (∼0.8 S/m), but also can temperature changes via structure shifts, enables temperature-induced reversible control. Especially, temperature-dependent transparent-opaque transition kinetics tuned protonation -COOH groups at pH < pKa, utilizing achieve inscribed programmed memory for information memorizing-forgetting-recalling based on a pH-engraved evolution response changes. be used as efficient near-infrared (NIR) light-controlled drug release carriers realize on-demand release, serve soft sensor recognize different body postures movement behaviors high strain sensitivity (gauge factor, GF = 5.98), broad working (5-500%), rapid (139 ms), excellent sensing reliability (≈1000 cycles 50% strain).

Language: Английский

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Stretchable, tough, self-healing, antifreezing, and multifunctional nanocellulose-based hydrogel for wearable monitoring of human motion

Materials Science and Engineering B, Journal Year: 2025, Volume and Issue: 317, P. 118175 - 118175

Published: March 4, 2025

Language: Английский

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Polyvinyl Alcohol/Quaternary Ammonium Chitosan Hydrogels with Excellent Conductivity, Adhesion, Antibacterial and Biocompatibility for Wearable Sensors

Composites Communications, Journal Year: 2025, Volume and Issue: unknown, P. 102342 - 102342

Published: March 1, 2025

Language: Английский

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Silicone Ionic Liquid-Based Hydrogel for Flexible Strain Sensors with Intrinsically Antifreezing Property

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Language: Английский

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