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Searching for Optimum Piezoelectric Nanomembranes
Abstract
For decades piezoelectricity was associated to ceramic materials. It was only recently that a class of materials piezoelectric polymers emerged. This work focuses on piezoelectric polymers, in special Poly (vinylidene fluoride) (PVdF) and its copolymers (PVdF-HFP and PVdF-TrFE), and how the electrospinning process affects its piezoelectric behavior. To be able to improve, even more, the phase formation, which is the phase responsible to the piezoelectric behavior, multi-walled carbon nanotubes functionalized by surfactants (SDBS) were introduced to the polymeric solution. Fiber morphology and spatial dispersion plays an important role into phase formation. Moreover, the CNT addition to polymeric solution lead to a decrease on fiber diameter around 34% and an increase 24% into phase formation. The SDBS effect was more effective at CNTs high concentrations (0.6% m/m), which somehow deactivate the saturation limit (0.15% m/m). Finally, the optimal nanomembrane configuration is highly dependent of the electrospinning operational parameters, but the CNT concentration of 0.15% m/m seems to serve as a nucleation site.
DOI
10.12783/asc2017/15337
10.12783/asc2017/15337