A Chemiresistive CO2 Sensor Based on CNT-Functional Polymer Composite Films

Carbon dioxide (CO 2 ) is commonly used in the ventilation control of buildings as a metric for indoor air quality (IAQ); however, few commercially available sensors exist that can reliably measure CO 2 while being low cost, exhibiting low power consumption, and being easily deployable for use in ap...

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Bibliographic Details
Main Authors: Siefker, Zachary A., Boyina, Abhi, Braun, James E., Zhao, Xikang, Boudouris, Bryan W., Bajaj, Nikhil, Chiu, George T.-C., Rhoads, Jeffrey F.
Format: Conference Proceeding
Language:English
Subjects:
Buildings
Humidity
Monitoring
Resistance
Temperature measurement
Temperature sensors
Testing
Online Access:Request full text
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Summary:Carbon dioxide (CO 2 ) is commonly used in the ventilation control of buildings as a metric for indoor air quality (IAQ); however, few commercially available sensors exist that can reliably measure CO 2 while being low cost, exhibiting low power consumption, and being easily deployable for use in applications such as occupancy monitoring. This work presents an initial assessment of a chemiresistive CO 2 sensor that leverages a polymer blend of branched polyethylenimine (PEI) and poly(ethylene glycol) (PEG) as the CO 2 absorbing layer. Prototype sensors were assessed in a bench-top environmental test chamber at various ambient temperatures (22-26 °C), relative humidity levels (20-80%), and CO 2 concentrations (400-2,000 ppm), which are typical of indoor environments. The results show that with some further advancements, the proposed method could serve as an alternative to current commercially available CO 2 sensing technologies.
ISSN:2168-9229
DOI:10.1109/SENSORS47125.2020.9278681