Facile fabrication of flexible PDDA@PANI/PVDF humidity sensor and applications for non-contact monitoring

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

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI:10.1016/j.sna.2025.116674

Jintian Qian , Mingxia Feng , Dawu Lv , Ruiqin Tan , Wenfeng Shen , Weijie Song

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引用次数: 0

Abstract

Flexible humidity sensors play a crucial role in the real-time monitoring of human physiological activities by being integrated with smart terminals, compact medical devices and flexible electronic skins. In this work, a facile fabrication method of a flexible humidity sensor based on a composite material of poly(diallyldimethylammonium chloride) (PDDA) and polyaniline (PANI) using in-situ polymerization and dip-coating techniques was proposed on a microporous poly(vinylidene fluoride) (PVDF) filter membrane substrate. The resulting PDDA@PANI/PVDF-3.50 % sensor demonstrates remarkable sensitivity with a response of up to 5249 % across a humidity range of 11–97 % relative humidity (RH), minimal hysteresis (∼1.2 %), rapid response and recovery times (11 s and 28 s), stable performance under mechanical deformation, and excellent long-term durability. Additionally, the sensor can readily identify three breathing states and detect finger movements as short as 1 mm. The excellent performance is attributed to the hydrophilic modification and synergistic effect of PDDA on PANI chain, and the rich microporous structure of PVDF membrane. This work offers a novel strategy for developing advanced flexible sensors with significant potential in wearable electronic devices for healthcare and human-computer interaction.

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柔性PDDA@PANI/PVDF湿度传感器的简易制造及非接触式监测应用

柔性湿度传感器与智能终端、紧凑型医疗设备和柔性电子皮肤相结合，在实时监测人体生理活动方面发挥着至关重要的作用。本文提出了一种基于聚二烯基二甲基氯化铵（PDDA）和聚苯胺（PANI）的复合材料在微孔聚偏氟乙烯（PVDF）过滤膜基底上原位聚合和浸涂的柔性湿度传感器制备方法。由此产生的PDDA@PANI/PVDF-3.50 %传感器具有卓越的灵敏度，在相对湿度（RH）为11 - 97 %的湿度范围内响应高达5249 %，最小的滞后（~ 1.2 %），快速响应和恢复时间（11 s和28 s），在机械变形下性能稳定，并且具有出色的长期耐用性。此外，传感器可以很容易地识别三种呼吸状态，并检测短至1 毫米的手指运动。优异的性能归功于PDDA对聚苯胺链的亲水性改性和协同作用，以及PVDF膜丰富的微孔结构。这项工作为开发先进的柔性传感器提供了一种新的策略，在医疗保健和人机交互的可穿戴电子设备中具有重要的潜力。

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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...