Highly sensitive gas permeable gelatin-polyvinyl alcohol conductive hydrogels prepared by fermentation method as wearable sensor

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-03-17 DOI:10.1016/j.sna.2025.116456

Wenjing Xu , Xiaoyu Ma , Jianan Chen , Xiang Wu , Qi Bao , Lijun You , Shaoyun Wang , Caihua Xiong

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引用次数: 0

Abstract

With the increasing demand for wearable sensing devices equipped with hydrogels for motion intent recognition and health monitoring applications, it is urgent to carry out research on enhancing their comfort and breathability. Gel/PVA/DPy breathable hydrogels with high breathability, excellent electrical conductivity, and sensing ability were prepared by the fermentation method using gelatin and polyvinyl alcohol to create a dual-network structure of hydrogels with Dopamine-modified polypyrrole(DPy) serving as a conductive filler. The prepared hydrogel film exhibits excellent air permeability (5.83 mg·cm⁻²·h⁻¹), tensile sensitivity (GF=5.14), compressive sensitivity (GF = 5.33), outstanding responsiveness to external tensile stimulation (response time of 0.30 s, recovery time of 0.20 s), and exceptional responsiveness to external compressive stimuli (response time of 0.20 s, recovery time of 0.30 s). The film is utilized as a high-sensitivity, high-precision wearable sensor for monitoring activities such as finger bending, facial micro-expressions, wrist swinging, and throat vocalizations; for real-time pressure-sensitive arrays; and for controlling electronic devices for gaming. This study offers a design concept and reference for preparing breathable hydrogel films for wearable sensors.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...