Study of Water Retention Elevation on TiO2 /Nafion Membrane By Using Dynamic AFM
DMAFM, which is called tapping mode or non contact mode AFM measures amplitude and phase shift of specimen surface by amplitude modulation. The amplitude and phase shift are induced from the attraction force variation between tip and sample. The phase shift on the membrane is corresponding mechanical properties on the specimen such as viscosity, elasticity, and viscoelasticity.
We are synthesize the TiO2/Nafion composite membrane for high temperature PEMFC and characterize water retention on the membrane at variation conditions by using dynamic at mode atomic force microscopy (DMAFM). Characterization has done by two steps. Firstly, we simultaneously map topography and phase images of TiO2/Nafion composite membrane and pristine Naion under different humidity and temperature. The phase distributions on the composite membrane under different conditions are characterized. Secondly, the histograms from each image are extracted and statistically analyzed.
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