Plasticized relaxor ferroelectric terpolymer: Toward giant electrostriction, high mechanical energy and low electric field actuators
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- 作者：Jean-Fabien Capsal ; J茅r茅my Galineau ; Micka毛l Lallart ; Pierre-Jean Cottinet ; Daniel Guyomar
- 关键词：Polymers ; Composites ; Electroactive polymers ; Actuators
- 刊名：Sensors and Actuators A: Physical
- 出版年：1 March, 2014
- 年：2014
- 卷：207
- 期：Complete
- 页码：25-31
- 全文大小：1564 K
文摘
Enhancing the electrostrictive strain under low electric field of a dielectric electroactive polymer (EAP) is essential in soft actuators applications. Conventional electrostrictive polymers suffer of the high electric fields usually required to reach sufficient strain. Here we report a new approach that greatly enhanced the strain under electric field and the mechanical energy density of fluorinated terpolymer EAP. A new all organic composite based on poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer (P(VDF-TrFE-CFE)) doped with bis(2-ethylhexyl) phthalate (DEHP) was synthesized. DEHP molecule acts as a plasticizer that leads to large dipolar interfacial effects. This chemical modification allows a 28-fold increase of the electrostrictive strain and a 215-fold increase of the mechanical energy density. As a consequence, this new approach permits the uses of the exceptional properties of the fluorinated terpolymer for an electric field nearly 5 times lower and represents a simple and effective solution to this technological barrier.