Humidity Sensors Based on Titanium Oxide/Polyvinyl Alcohol Composite Nanofibers via Electrospinning 


Vol. 54,  No. 1, pp. 1-7, Feb.  2017
10.12772/TSE.2017.54.001


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  Abstract

In this study, titanium oxide(TiO2)/polyvinyl alcohol(PVA) electrospun composite nanofibers were used as a humidity sensing layer. The electrospinning behavior was observed to investigate the influence of different concentrations of TiO2. In order to secure the structural stability of the sensing layer, which was dissolved under conditions of high humidity, the PVA-based sensing layer was crystallized at 180℃. The humidity sensing properties, including the impedance versus relative humidity and response-recovery time, were found to improve because of the structural advantage of the fiber-shaped sensing layer and the hydrophillic inorganic particles. Furthermore, The humidity sensing mechanism could be elucidated via the complex impedance plots and corresponding equivalent circuit.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

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