Water activated ionic conduction in cross-linked polyelectrolytes

The electrical properties of polyelectrolytes depend on the water concentration of the environment. The behaviour of both conductance and capacitance caused by variations in relative humidity and temperature was investigated by impedance spectroscopy for humidity sensors based on an interpenetrated...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2008-08, Vol.134 (1), p.230-233
Main Authors: Camaioni, N., Casalbore-Miceli, G., Li, Y., Yang, M.J., Zanelli, A.
Format: Article
Language:English
Subjects:
Actuators
Chemoresistors
Conductance
Cross-linked polyelectrolytes
Electrical properties
Humidity
Humidity sensors
Interpenetrated polymer networks
Ionic conduction
Mathematical analysis
Moisture content
Polyelectrolytes
Sensors
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Summary:The electrical properties of polyelectrolytes depend on the water concentration of the environment. The behaviour of both conductance and capacitance caused by variations in relative humidity and temperature was investigated by impedance spectroscopy for humidity sensors based on an interpenetrated network of a polymer and a polyelectrolyte. The results were interpreted on the base of the Langmuir and Kelvin equations and two different sensing mechanisms were highlighted for low and high water content.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2008.04.035