Intimate Humidity Monitoring: Development and Performance Evaluation of Wearable Color-Electric Dual-Mode Humidity Sensor 


Vol. 25,  No. 2, pp. 673-682, Feb.  2024
10.1007/s12221-023-00444-w


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  Abstract

Flexible wearable humidity sensors have seen significant development in healthcare fields. However, most sensors have only one electrical response mode with low visualization, thus limiting applications. Here, a wearable color-electric dual-mode linked-response humidity sensor was provided for intimate humidity monitoring. Specifically, nickel (II) iodide (NiI2) and polyacrylonitrile (PAN) were chemically treated and sodium hydroxide (NaOH)-modified, respectively. Subsequently, the modified NiI2 and PAN were configured into a spinning solution to fabricate humidity-sensitive NiI2/PAN membranes utilizing the solution blow-spinning method. Polyimide-based fork-finger electrodes were then laminated onto the humidity-sensitive NiI2/PAN membrane to assemble a wearable color-electric bimodal NiI2/PAN humidity sensor. The sensor was characterized by a fast response time (6.19 s) and recovery time (9.58 s), wide humidity-monitoring range (11–98% RH), relatively small hysteresis (1.9% RH), and excellent stability (> 30 d). As the relative humidity (RH) increased from 11 to 98%, the color of the Ni2/PAN membrane changed drastically from black to light yellow, demonstrating significant potential in enhancing the visualization of humidity sensors and optimizing their monitoring effects.

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  Cite this article

[IEEE Style]

G. Sun, H. Zhu, H. Han, G. Sun, H. Zhang, H. Hu, C. Xiao, "Intimate Humidity Monitoring: Development and Performance Evaluation of Wearable Color-Electric Dual-Mode Humidity Sensor," Fibers and Polymers, vol. 25, no. 2, pp. 673-682, 2024. DOI: 10.1007/s12221-023-00444-w.

[ACM Style]

Guangwu Sun, Hui Zhu, Huimin Han, Guangwu Sun, Hua Zhang, Hongyan Hu, and Changfa Xiao. 2024. Intimate Humidity Monitoring: Development and Performance Evaluation of Wearable Color-Electric Dual-Mode Humidity Sensor. Fibers and Polymers, 25, 2, (2024), 673-682. DOI: 10.1007/s12221-023-00444-w.

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