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This study is conducted to enhance the sensitivity of nanocomposite films in applications such as humidity sensing. For this purpose, polyvinylidene fluoride (PVDF) and titanium dioxide (TiO2) nanocomposites based capacitive humidity sensors are fabricated via spin coating technique. The concentration of PVDF has been varied to investigate its effect on the properties of the films. The synthesized PVDF-TiO2 composites are characterized by X-ray diffraction (XRD), Raman spectroscopy, Differential scanning calorimetry (DSC), Scanning electron microscopy (SEM), Atomic force microscopy (AFM) and Contact angle measurements. These characterization techniques are employed to study the structure, morphology, thermal stability and hydrophilicity of the deposited nanocomposite films. The 2.5wt% PVDF based capacitive humidity sensors demonstrate increased linearity and sensitivity as compared to the 5wt% sensors. Also, results show that the addition of TiO2 nanoparticles enhances the hydrophilicity of composite film as compared to standalone PVDF films.

NA.2 - Morphological Study of PVDF-TiO2 Composites Based Humidity Sensors