Environmental Stability Stretchable Organic Hydrogel Humidity Sensor for Respiratory Monitoring with Ultrahigh Sensitivity

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: May 3, 2024

Abstract Real‐time monitoring of respiration plays a very important role in human health assessment, especially and analyzing during exercise sleep. However, traditional humidity sensors still have problems flexibility, sensitivity, durability, so there is an urgent need to develop with high stretchability, environmental resistance as respiratory applications. Here, based on the double network hydrogel structure polyvinyl alcohol polyacrylamide, highly sensitive, stretchable, environmentally stable organic sensor has been manufactured by using synergistic effect lithium chloride MXene. The shows rapid response range 40–85% RH, sensitivity −103.4%/% RH. In addition, it exhibits more than 3000% mechanical strain excellent resistance, which attributed chemical cross‐linking multiple hydroxyl groups glycerol forming rich hydrogen bonds water polymer chains. used for real‐time breathing sleep processes. This work provides new strategy preparing high‐performance, extensibility, stability hydrogel‐based monitoring.

Language: Английский

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Cellulose nanofibers-based composite film with broadening MXene layer spacing and rapid moisture separation for humidity sensing and humidity actuators

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 278, P. 134383 - 134383

Published: Aug. 3, 2024

Based on the basic idea of expanding interlayer spacing MXene, utilizing effect gallic acid-modified cellulose nanofibers for rapid moisture separation, flexible sensing and driving composite film with a perfect balance among humidity signal response mechanical properties was prepared. Inspired by stacking autumn fallen leaves, nanofibers-based films were formed self-assembly under vacuum filtration blending MXene. The enhanced (tensile strength 131.1 MPa, puncture load 0.88 N, tearing 165.55 N/mm, elongation at break 16.14 %), (the stable induced voltage 63.7 mV response/recovery time 3.2/5.1 s), (154.7° bending angle) observed. synergistic hydrogen bonds, "pinning effect" arising from side chains, hierarchical layered microstructure contributed to performance. This work exemplifies application green natural product preparing intelligent sensing, wearable devices, biomimetic robots.

Language: Английский

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Advances in humidity sensors based on Self-Powered technology

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159480 - 159480

Published: Jan. 1, 2025

Language: Английский

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All-printed MXene/WS2-based flexible humidity sensor for multi-scenario applications

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 422, P. 136605 - 136605

Published: Sept. 7, 2024

Language: Английский

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Carrageenan-modified MXene nanocomposite-based all-printed flexible humidity sensor for healthcare application

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 418, P. 136316 - 136316

Published: July 24, 2024

Language: Английский

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Multiresponsive Ionic Conductive Alginate/Gelatin Organohydrogels with Tunable Functions

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(52)

Published: Aug. 1, 2024

Abstract Materials combining stretchability and sensitivity to external stimuli are key for wearable electronics applications enable the emergence of disruptive technologies in biosensing, health monitoring, photodetection human motion recognition. Conductive organohydrogels have gained significant attention due their high cost‐effective preparation. Biopolymers like gelatin alginate offer unique opportunities developing responsive devices, owing biocompatibility toward environmental factors. Here sustainable bio‐inspired method is presented produce alginategelatin transparency visible range, ionic conductivity, stretchability, multiresponsiveness. The controlled alginate's crosslinking with various metal cations Mn 2+ , Cu Fe 3+ Zr 4+ enables modulating conductivity as well finely tuning material's thermal mechanical properties. These show responsiveness temperature (from 10 50 degrees, a 0.19 K −1 ), relative humidity 20 80%, 0.022 RH(%) strain (gauge factor >1.6), enabling real‐time monitoring physiological parameters. Remarkably, they also exhibit photoresponsivity 9.2 µA W under light, feature rarely reported literature. ease chosen sensitivities open perspectives applying these materials stretchable sensors.

Language: Английский

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Sulfonate-modified fullerenes mimicking tentacle structures for humidity sensors

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 661, P. 977 - 986

Published: Feb. 5, 2024

In this work, a straightforward method for synthesizing fullerene derivatives with tentacle structures has been explored monitoring environmental humidity, which involves introducing sulfonate onto the fullerenes. The structure and number of polar groups in three determined by series structural tests greatly affect their hydrophilicity morphology, resulting changes humidity sensitive properties. particular, hysteresis response time sensors display great correlation hydrophilicity. C

Language: Английский

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Unveiling the MIL-53(Al) MOF: Tuning Photoluminescence and Structural Properties via Volatile Organic Compounds Interactions

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(5), P. 388 - 388

Published: Feb. 20, 2024

MIL-53(Al) is a metal-organic framework (MOF) with unique properties, including structural flexibility, thermal stability, and luminescence. Its ability to adsorb volatile organic compounds (VOCs) water vapor makes it promising platform for sensing applications. This study investigated the adsorption mechanism of different VOCs, ketones, alcohols, aromatics, molecules, focusing on transformations due pore size variation photoluminescence properties. The reported results assess selectivity towards VOCs provide insights into their fundamental properties potential applications in sensing.

Language: Английский

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Mussel-inspired dopamine/MXene composite: Improved oxidation stability for humidity sensing and non-contact monitoring

Sensors and Actuators B Chemical, Journal Year: 2025, Volume and Issue: 433, P. 137533 - 137533

Published: March 3, 2025

Language: Английский

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Ionic Covalent Organic Framework as a Dual Functional Sensor for Temperature and Humidity

Small, Journal Year: 2024, Volume and Issue: 20(32)

Published: Feb. 23, 2024

Abstract Visual sensing of humidity and temperature by solids plays an important role in the everyday life industrial processes. Due to their hydrophobic nature, most covalent organic framework (COF) sensors often exhibit poor optical response when exposed moisture. To overcome this challenge, is set out improve, moisture incorporating H‐bonding ionic functionalities into COF network. A highly sensitive COF, consisting guanidinium diformylpyridine linkers (TG‐DFP), capable detecting changes content fabricated. The hydrophilic nature enables enhanced water uptake, allowing trapped molecules form a large number hydrogen bonds. Despite presence non‐emissive building blocks, H‐bonds restrict internal bond rotation within leading reversible fluorescence solid‐state hydrochromism relative temperature.

Language: Английский

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