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|Title:||High dielectric constant poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) for capacitive pressure and bending sensors|
Barbosa, J. C.
Gonçalves, Renato Ferreira
Tubio, C. R.
Vilas-Vilela, J. L.
Costa, Carlos Miguel Silva
|Citation:||Pereira, N., Gonçalves, S., Barbosa, J. C., Gonçalves, R., Tubio, C. R., Vilas-Vilela, J. L., . . . Lanceros-Mendez, S. (2021). High dielectric constant poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) for capacitive pressure and bending sensors. Polymer, 214, 123349. doi: https://doi.org/10.1016/j.polymer.2020.123349|
|Abstract(s):||Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene), P(VDF-TrFE-CFE), samples were prepared by solvent casting by varying polymer concentration and solvent evaporation temperature. Different sample morphologies were obtained depending on the processing conditions, as well as different physical-chemical properties such as degree of crystallinity, mechanical and dielectric properties. On the other hand, the electroactive β-phase content and the degradation temperature of the P(VDF-TrFE-CFE) samples are independent of the processing conditions. At 1 kHz, the highest dielectric constant, ε’ = 40, was obtained for the samples prepared with 15 wt% polymer concentration in solutions and processing conditions based on solvent evaporation and polymer melting at 210 °C. Taking into account the high dielectric response, pressure and bending capacitive sensors were developed with excellent response and high sensibility (0.03 kPa−1). The developed materials were evaluated for bending and force detection applications. Thus, it is concluded that the developed P(VDF-TrFE-CFE) films are suitable for a new generation of multifunctional materials for capacitive sensing applications, including both force and deformation sensors and touchpads.|
|Appears in Collections:||CAlg - Artigos em revistas internacionais / Papers in international journals|
CDQuim - Artigos (Papers)