Strategies in the preparation of conductive polyvinyl alcohol hydrogels for applications in flexible strain sensors, flexible supercapacitors, and triboelectric nanogenerator sensors: an overview

Advanced Composites and Hybrid Materials, Год журнала: 2023, Номер 6(6)

Опубликована: Ноя. 8, 2023

Язык: Английский

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Liquid Metal-Doped Conductive Hydrogel for Construction of Multifunctional Sensors

Analytical Chemistry, Год журнала: 2023, Номер 95(7), С. 3811 - 3820

Опубликована: Фев. 7, 2023

Interest in wearable and stretchable multifunctional sensors has grown rapidly recent years. The sensing elements must accurately detect external stimuli to expand their applicability as sensors. However, the sensor's self-healing adhesion a target object have been major challenges developing such practical versatile devices. In this study, we prepared hydrogel (LM-SA-PAA) composed of liquid metal (LM), sodium alginate (SA), poly(acrylic acid) (PAA) with ultrastretchable, excellent self-healing, self-adhesive, high-sensitivity capabilities that enable conformal contact between sensor skin even during dynamic movements. performance stems from its double cross-linked networks, including physical chemical networks. cross-link formed by ionic interaction carboxyl groups PAA gallium ions provide reversible autonomous repair properties, whereas covalent bond provides stable strong network. Alginate forms microgel shell around LM nanoparticles via coordination Ga ions. addition offering exceptional colloidal stability, sufficient polar groups, ensuring adheres diverse substrates. Based on efficient electrical pathway provided LM, exhibited strain sensitivity enabled detection various human motions electrocardiographic monitoring. preparation method is simple can be used for low-cost fabrication sensors, which broad application prospects human-machine interface compatibility medical

Язык: Английский

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Conductive nanocomposite hydrogels for flexible wearable sensors

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(16), С. 9371 - 9399

Опубликована: Янв. 1, 2024

We present a comprehensive review of the recent research advances in field sensors based on hydrogels with nanofillers. The characteristics and design strategies nanofillers are highlighted multiple properties conductive nanocomposite described.

Язык: Английский

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

Journal of Polymer Science, Год журнала: 2024, Номер 62(20), С. 4599 - 4611

Опубликована: Июль 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.

Язык: Английский

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Interfacial engineering of liquid metal nanoparticles for the fabrication of conductive hydrogels: A review

Chemical Engineering Journal, Год журнала: 2024, Номер 486, С. 150197 - 150197

Опубликована: Март 6, 2024

Язык: Английский

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Smartphone-assisted microfluidic sensor as an intelligent device for on-site determination of food contaminants: Developments and applications

Microchemical Journal, Год журнала: 2023, Номер 190, С. 108692 - 108692

Опубликована: Март 31, 2023

Язык: Английский

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Folk arts-inspired twice-coagulated configuration-editable tough aerogels enabled by transformable gel precursors

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Дек. 19, 2023

Aerogels, as famous lightweight and porous nanomaterials, have attracted considerable attention in various emerging fields recent decades, however, both low density weak mechanical performance make their configuration-editing capability challenging. Inspired by folk arts, herein we establish a highly efficient twice-coagulated (TC) strategy to fabricate configuration-editable tough aerogels enabled transformable gel precursors. As proof of concept, aramid nanofibers (ANFs) polyvinyl alcohol (PVA) are selected the main components aerogel, among which PVA forms flexible network first coagulation process, ANF configuration-locking second process. TC guarantees resulting with high toughness feasible configuration editing individually or simultaneously. Altogether, special through soft hard modulation provide great opportunities break limits expand application areas aerogels.

Язык: Английский

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Anisotropic, ultra-sensitive, self-adhesive, biocompatible, and conductive hydrogels prepared for wearable sensors

European Polymer Journal, Год журнала: 2023, Номер 196, С. 112277 - 112277

Опубликована: Июль 3, 2023

Язык: Английский

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Catechyl lignin-reinforced mechanical performances of Poly(vinyl alcohol)-Based materials

Composites Part B Engineering, Год журнала: 2023, Номер 264, С. 110917 - 110917

Опубликована: Авг. 2, 2023

Язык: Английский

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

Biosensors, Год журнала: 2023, Номер 13(8), С. 823 - 823

Опубликована: Авг. 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.

Язык: Английский

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