High-Sensitivity Composite Dual-Network Hydrogel Strain Sensor and Its Application in Intelligent Recognition and Motion Monitoring

ACS Applied Polymer Materials, Journal Year: 2023, Volume and Issue: 5(4), P. 2628 - 2638

Published: March 6, 2023

Flexible electronic sensors are attracting more and attention because of their outstanding flexibility foldability. Based on this background, a composite hydrogel with excellent flexibility, good stability, high sensitivity is prepared in work. This high-performance composed polyacrylamide, sodium alginate, MXene, PEDOT:PSS through dynamic supramolecular cross-linking. The electrical conductivity significantly enhanced by the addition conductive polymer MXene. Hydrogel increased 150% materials at same tensile strain. It exhibits (GF = 1.99) linearity over wide operating range 1000% strain, which ensures detection performance sensor under large strain conditions. In addition, it has repeatability (600 cycles) fast response/recovery times (0.624 s/0.912 s). Due to performance, was made into smart explore its application skin. data acquisition module were integrated for real-time monitoring pressure. We combine deep learning algorithms provide new solution human motion recognition, such as joint flexion, facial expression change, health monitoring, handwriting recognition.

Language: Английский

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Electrochemical Wearable Biosensors and Bioelectronic Devices Based on Hydrogels: Mechanical Properties and Electrochemical Behavior

Biosensors, Journal Year: 2023, Volume and Issue: 13(8), P. 823 - 823

Published: Aug. 15, 2023

Hydrogel-based wearable electrochemical biosensors (HWEBs) are emerging biomedical devices that have recently received immense interest. The exceptional properties of HWEBs include excellent biocompatibility with hydrophilic nature, high porosity, tailorable permeability, the capability reliable and accurate detection disease biomarkers, suitable device–human interface, facile adjustability, stimuli responsive to nanofiller materials. Although biomimetic three-dimensional hydrogels can immobilize bioreceptors, such as enzymes aptamers, without any loss in their activities. However, most suffer from low mechanical strength electrical conductivity. Many studies been performed on electroactive nanofillers, including biomacromolecules, carbon-based materials, inorganic organic nanomaterials, tackle these issues. Non-conductive even conductive may be modified by well redox species. All modifications led design development efficient nanocomposites biosensors. In this review, both conductive-based non-conductive-based derived natural synthetic polymers systematically reviewed. main synthesis methods characterization techniques addressed. behavior discussed detail. Finally, prospects potential applications biosensing, healthcare monitoring, clinical diagnostics highlighted.

Language: Английский

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A “bird nest” bioinspired strategy deployed for inducing cellulose gelation without concomitant dissolution

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(5)

Published: Sept. 29, 2023

Language: Английский

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In Situ Polymerization of Hydrogel Electrolyte on Electrodes Enabling the Flexible All‐Hydrogel Supercapacitors with Low‐Temperature Adaptability

Small, Journal Year: 2024, Volume and Issue: 20(22)

Published: Feb. 5, 2024

Abstract All‐hydrogel supercapacitors are emerging as promising power sources for next‐generation wearable electronics due to their intrinsic mechanical flexibility, eco‐friendliness, and enhanced safety. However, the insufficient interfacial adhesion between electrode electrolyte frozen hydrogel matrices at subzero temperatures largely limit practical applications of all‐hydrogel supercapacitors. Here, an supercapacitor is reported with robust contact anti‐freezing property, fabricated by in situ polymerizing onto electrodes. The developed synergistic effect a tough matrix topological entanglements. Meanwhile, incorporation zinc chloride (ZnCl 2 ) prevents freezing water solvents endows flexibility fatigue resistance across wide temperature range 20 °C –60 °C. Such demonstrates satisfactory low‐temperature electrochemical performance, delivering high energy density 11 mWh cm −2 excellent cycling stability capacitance retention 90% over 10000 cycles −40 Notably, can endure dynamic deformations operate well under 2000 tension even °C, without experiencing delamination failure. This work offers strategy flexible storage devices adaptability.

Language: Английский

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High-toughness multifunctional conductive hydrogel fibers via microfluidic spinning for flexible strain sensor

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 222, P. 119598 - 119598

Published: Sept. 7, 2024

Language: Английский

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