Novel TOCN/PVOH Dielectric Composite Sheets With Low Ecological Footprint for Microwave Humidity Sensing

Humidity-sensitive dielectric sheets combine easy integration of humidity sensing ability and high sensitivity performance through microwave technologies. However, only a few materials have been investigated so far. This article introduces TEMPO oxidized nanocellulose (TOCN) composite sheets with po...

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Bibliographic Details
Published in:IEEE sensors letters 2018-12, Vol.2 (4), p.1-4
Main Authors: Eyebe, Guy Ayissi, Bideau, Benoit, Loranger, Eric, Boubekeur, Naimi, Domingue, Frederic
Format: Article
Language:English
Subjects:
Coplanar waveguide techno (CPW)
Coplanar waveguides
Detection
Dielectrics
Environmental impact
Footprint analysis
Frequency response
Humidity
Humidity measurement
microwave humidity sensors
Microwave technology
Parameter robustness
Parameter sensitivity
Polyvinyl alcohol
Resonant frequency
Sensitivity
Sensors
Sheets
TEMPO oxidized nanocellulose (TOCN)
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Summary:Humidity-sensitive dielectric sheets combine easy integration of humidity sensing ability and high sensitivity performance through microwave technologies. However, only a few materials have been investigated so far. This article introduces TEMPO oxidized nanocellulose (TOCN) composite sheets with polyvinyl alcohol (PVOH) as a sensitive material with low ecological footprint for microwave humidity sensing. Preparation and physical characterization of these novel sensitive materials are realized. The humidity sensing performances are studied with a CPW-based serial resonator where the sensitive sheets are deposited. Experimental results validate the sensitivity of TOCN/PVOH sheets both in reflection and transmission. Dynamic range, sensitivity, and the robustness of microwave parameters over the humidity measurement range are analyzed. The best results are reached with the sample with only 4 wt% of PVOH: 1.85 MHz/%RH in the 55-100%RH for the frequency response and 0.46°/%RH in 70-100%RH range for the phase response.
ISSN:2475-1472
2475-1472
DOI:10.1109/LSENS.2018.2869155