All-organic electrostrictive polymer composites with low driving electrical voltages for micro-fluidic pump applications

Abstract : This paper focuses on the improvement of a relaxor ferroelectric terpolymer, i.e., poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)], filled with a bis(2-ethylhexyl) phthalate (DEHP). The developed material gave rise to a significantly increased longitudinal electrostrictive strain, as well as an increased mechanical energy density under a relatively low electric field. These features were attributed to the considerably enhanced dielectric permittivity and a decreased Young modulus as a result of the introduction of only small DEHP plasticizer molecules. In addition, the plasticizer-filled terpolymer only exhibited a slight decrease of the dielectric breakdown strength, which was a great advantage with respect to the traditional polymer-based electrostrictive composites. More importantly, the approach proposed herein is promising for the future development and scale-up of new high-performance electrostrictive dielectrics under low applied electrical fields through modification simply by blending with a low-cost plasticizer. An experimental demonstration based on a flexible micro-fluidic application is described at the end of this paper, confirming the attractive characteristics of the proposed materials as well as the feasibility of integrating them as micro-actuators in small-scale devices.
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Submitted on : Tuesday, April 17, 2018 - 6:23:06 PM
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M.Q. Le, J.-F. Capsal, J. Galineau, F. Ganet, X. Yin, et al.. All-organic electrostrictive polymer composites with low driving electrical voltages for micro-fluidic pump applications. Scientific Reports, Nature Publishing Group, 2015, 5, ⟨10.1038/srep11814⟩. ⟨hal-01769268⟩

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