Scalable fabrication of highly flexible porous polymer-based capacitive humidity sensor using convergence fiber drawing
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polymers-11-01985.pdf
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1.94 MB
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Author(s)
Tousi, Maryam Mesgarpour
Zhang, Yujing
Wan, Shaowei
Yu, Li
Hou, Chong
Yan, Ning
Fink, Yoel
Wang, Anbo
Jia, Xiaoting
Fink, Yoel
Date Issued
December 2019
Journal
Polymers
Publisher
Multidisciplinary Digital Publishing Institute
Citation
Tousi, Maryam Mesgarpour, et al., "Scalable fabrication of highly flexible porous polymer-based capacitive humidity sensor using convergence fiber drawing." Polymers 11, 12 (2019): no. 1985 doi 10.3390/polym11121985 ©2019 Author(s)
Version
Final published version
Abstract
In this study, we fabricated a highly flexible fiber-based capacitive humidity sensor using a scalable convergence fiber drawing approach. The sensor's sensing layer is made of porous polyetherimide (PEI) with its porosity produced in situ during fiber drawing, whereas its electrodes are made of copper wires. The porosity induces capillary condensation starting at a low relative humidity (RH) level (here, 70%), resulting in a significant increase in the response of the sensor at RH levels ranging from 70% to 80%. The proposed humidity sensor shows a good sensitivity of 0.39 pF/% RH in the range of 70%-80% RH, a maximum hysteresis of 9.08% RH at 70% RH, a small temperature dependence, and a good stability over a 48 h period. This work demonstrates the first fiber-based humidity sensor fabricated using convergence fiber drawing. Keywords: capacitive humidity sensor; convergence fiber drawing; porous polymer; flexible; PEI
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.3390/polym11121985
