Strip-type flexible capacitive humidity sensor based on composite of polyimide and poly(glycidyl methacrylate): Fabrication, humidity sensitive performance and potential for detecting water content in liquids

Zhao, Huijie; Han, Kaiyue; Li, Yang

doi:10.1016/j.colsurfa.2023.132092

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…The sensor was able to detect pronounced words, coughing, skin moisture, approaching fingers, and oral and nasal breathing patterns. Zhao et al 168 prepared a flexible capacitive humidity sensor based on a "pine nut" microstructure composed of two intertwined copper wires coated with soluble PI and poly(glycidyl methacrylate) (PGMA), for real-time monitoring of water content in liquids and air applications. The sensor exhibited a sensitivity of ∼1.4%/% RH and a hysteresis of 6.6% RH, with sensors prepared with higher concentrations of PI revealing the minimum hysteresis values.…”

Section: Acsmentioning

confidence: 99%

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Ferreira,

Silva,

Nunes-Pereira

2024

ACS Sens.

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Due to an ever-increasing amount of the population focusing more on their personal health, thanks to rising living standards, there is a pressing need to improve personal healthcare devices. These devices presently require laborious, time-consuming, and convoluted procedures that heavily rely on cumbersome equipment, causing discomfort and pain for the patients during invasive methods such as sample-gathering, blood sampling, and other traditional benchtop techniques. The solution lies in the development of new flexible sensors with temperature, humidity, strain, pressure, and sweat detection and monitoring capabilities, mimicking some of the sensory capabilities of the skin. In this review, a comprehensive presentation of the themes regarding flexible sensors, chosen materials, manufacturing processes, and trends was made. It was concluded that carbon-based composite materials, along with graphene and its derivates, have garnered significant interest due to their electromechanical stability, extraordinary electrical conductivity, high specific surface area, variety, and relatively low cost.

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Section: Acsmentioning

confidence: 99%

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Ferreira,

Silva,

Nunes-Pereira

2024

ACS Sens.

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“…In order to improve the sensitivity of the sensor, carbon black [ 60 ], lithium chloride, graphene [ 61 ], halloysite nanotube [ 62 ], and poly(glycidyl methacrylate) [ 63 ], and so on are doped into PI to form a composite material as a new sensitive layer.…”

Section: Applications Of Pi In Sensorsmentioning

confidence: 99%

“…Although the repeatability of the sensor is not good enough and the dehumidification response needs to be improved, this work still proves that the improved PI structure plays an irreplaceable role in improving the performance of the humidity sensor. In order to improve the sensitivity of the sensor, carbon black [60], lithium chloride, graphene [61], halloysite nanotube [62], and poly(glycidyl methacrylate) [63], and so on are doped into PI to form a composite material as a new sensitive layer.…”

Section: Sensitive Layer In Capacitive Rh Sensormentioning

confidence: 99%

Recent Study Advances in Flexible Sensors Based on Polyimides

Zhang,

Chai,

Wang

et al. 2023

Sensors

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With the demand for healthy life and the great advancement of flexible electronics, flexible sensors are playing an irreplaceably important role in healthcare monitoring, wearable devices, clinic treatment, and so on. In particular, the design and application of polyimide (PI)-based sensors are emerging swiftly. However, the tremendous potential of PI in sensors is not deeply understood. This review focuses on recent studies in advanced applications of PI in flexible sensors, including PI nanofibers prepared by electrospinning as flexible substrates, PI aerogels as friction layers in triboelectric nanogenerator (TENG), PI films as sensitive layers based on fiber Bragg grating (FBG) in relative humidity (RH) sensors, photosensitive PI (PSPI) as sacrificial layers, and more. The simple laser-induced graphene (LIG) technique is also introduced in the application of PI graphitization to graphene. Finally, the prospect of PIs in the field of electronics is proposed in the review.

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Additive manufacturing of wearable flexible sensors based on GN/flexible resin composite materials

Chang,

Liu,

Xie

et al. 2024

J Mater Sci

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Strip-type flexible capacitive humidity sensor based on composite of polyimide and poly(glycidyl methacrylate): Fabrication, humidity sensitive performance and potential for detecting water content in liquids

Cited by 5 publications

References 27 publications

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Current On-Skin Flexible Sensors, Materials, Manufacturing Approaches, and Study Trends for Health Monitoring: A Review

Recent Study Advances in Flexible Sensors Based on Polyimides

Additive manufacturing of wearable flexible sensors based on GN/flexible resin composite materials

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