Abstract
The beta-phase in polyvinylidene fluoride (PVDF) is responsible for its ferro-, piezo- and pyroelectric properties, key for memory, sensing and actuation applications. Filler addition as a route to enhance the smart beta-phase in PVDF is presented in this study. PVDF composites with varying concentrations of microcrystalline cellulose, carbon nanotubes and kaolinite clay were prepared by solution-sonication method and subsequently cast into thin standing composite films. Crystallinity of PVDF and its composites were found to be similar. Phase evolution studies showed that addition of microcrystalline cellulose yields a beta-phase fraction comparable to carbon nanotubes and significantly higher than that of clay. The mechanism of interaction between microcrystalline cellulose and PVDF is also proposed.
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