Influence of Plasticizers on the Electromechanical Behavior of a P(VDF‐TrFE‐CTFE) Terpolymer: Toward a High Performance of Electrostrictive Blends

Schiava, Nellie Della; Le, Minh‐Quyen; Galineau, Jérémy; Santos, Fabrice Domingues Dos; Cottinet, Pierre‐Jean; Capsal, Jean‐Fabien

doi:10.1002/polb.24280

Cited by 21 publications

(34 citation statements)

References 30 publications

(46 reference statements)

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“…At higher frequency, terpolymer treated with GPC solvent shows lower dielectric loss. This effect can be related to the dipolar mobility of the polymer matrix that dominates at high frequency . The Ph.…”

Section: Resultsmentioning

confidence: 99%

“…This effect can be related to the dipolar mobility of the polymer matrix that dominates at high frequency. 4 The Ph. Eur.…”

Section: Toward High Electroactive Performance Processing Optimizationmentioning

confidence: 99%

“…Poly(vinylidenefluoride–trifluoroethylene–chlorotrifluoroethylene) terpolymer P(VDF‐TrFE‐CTFE) has attracted the interest of many researchers due to its relaxor ferroelectric properties that result in high electrostriction phenomena . Capsal et al recently proposed a simple and efficient solution to improve the electromechanical behavior of P(VDF‐TrFE‐CTFE) fluorinated terpolymer while applying a low electric field . By doping the polymer with DEHP (2‐ethylhexyl phthalate) plasticizer, it was possible to decrease the Young modulus and increase the dielectric permittivity simultaneously.…”

Section: Introductionmentioning

confidence: 99%

“…2 Capsal et al recently proposed a simple and efficient solution to improve the electromechanical behavior of P(VDF-TrFE-CTFE) fluorinated terpolymer while applying a low electric field. 3,4 By doping the polymer with DEHP (2-ethylhexyl phthalate) plasticizer, it was possible to decrease the Young modulus and increase the dielectric permittivity simultaneously. This simple chemical modification enhanced the electrostrictive strain of the terpolymer under a relatively low electric field compared with the conventional material.…”

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Processing optimization: A way to improve the ionic conductivity and dielectric loss of electroactive polymers

Pedroli

Marrani

et al. 2018

J Polym Sci B Polym Phys

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Electro‐active polymers (EAPs) such as P(VDF‐TrFE‐CTFE) are greatly promising in the field of flexible sensors and actuators, but their low dielectric strength driven by ionic conductivity is a main concern for achieving high electrostrictive performance. It is well known that there is a quadratic dependence of the strain response and mechanical energy density on the applied electric field. This dependence highlights the importance of improving the electrical breakdown EAPs while reducing the dielectric losses. This article demonstrates that it is possible to dramatically increase the electrical breakdown and decrease the dielectric losses by controlling processing parameters of the polymer synthesis and fabrication procedure. As a result, an enhancement of around 70% is achieved in both the strain and blocking force. The effects on the dielectric losses of the polymer crystallinity, molecular weight, solvent purity, and crystallization temperature are also investigated. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 1164–1173

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Section: Resultsmentioning

confidence: 99%

“…This effect can be related to the dipolar mobility of the polymer matrix that dominates at high frequency. 4 The Ph. Eur.…”

Section: Toward High Electroactive Performance Processing Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Processing optimization: A way to improve the ionic conductivity and dielectric loss of electroactive polymers

Pedroli

Marrani

et al. 2018

J Polym Sci B Polym Phys

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“…Promising developments incorporating a plasticizer into an EAP matrix improves radically the its strain response and mechanical energy density. [18,19] Such a chemical modification leads to large dipolar interfacial effects within the polymer matrix, a contribution of charge trapping between amorphous and crystalline phases, giving rise to increase of dielectric permittivity and simultaneously decrease of Young's modulus. [20] In the case of dielectric polymer, the electrostrictive strain can be generated under electric field attributed to dipolar orientation within the material (Maxwell forces).…”

Section: Electroactive Polymers Selectionmentioning

confidence: 99%

Surface Correction Control Based on Plasticized Multilayer P(VDF‐TrFE‐CFE) Actuator—Live Mirror

Thetpraphi

Houachtia

et al. 2019

Advanced Optical Materials

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high-bandwidth communication, civil space surveillance technologies, wireless optical communication systems (UV and free-space systems), hyper-aperture multimirror structures, geoengineering (space mirror), and astronomical systems. [1,2] In particular the light-gathering power of an optical telescope, its "light grasp" or aperture gain, is one of the most important features of a telescope, [3] which requires very precise glass mirror technology.Recently, we have proposed a "World's Largest Telescope" for achieving highcontrast observations that could use this technology. [4][5][6] Such an optical system will be limited by the cost and manufacturability of large mirrors. The work described here, optics fabricated from an optimized electroactive polymer (EAP), could enable optics like these. The new approach will extend conventional active mirror technologies to larger smooth optical surfaces, without abrasive polishing. This means it will be possible to create precisely shaped low scattered light mirrors-suitable to astronomical applications-faster and at lower production costs. Our long-term vision for the new technology is to decrease the mass density (and cost) of mirrors by an order of magnitude.The idea of using force actuator-sensors fabricated from EAPs [3,4] is developed in this work in order to achieve active mirror surface shape control. By manipulating EAPs as active supports, integrated into the mirror structure allows correcting the mirror shape with a continuous actuator force distribution. Figure 1 illustrates how EAPs behave as elastic electromechanical deforming springs. This "electrical polishing" can correct surface shape errors that would be conventionally removed by abrasive grinding. To achieve high optical mirror quality surfaces with a thickness of a few millimeters the EAP glass deformation must have a dynamic range of few microns corresponding to actuator forces of about 1 N. The technique we propose could potentially be achieved using only additive manufacturing via 3D-printing technology.In this article we aim to present the EAP concept for Live-Mirror active optics. We evaluate different polymers in specific actuator designs in order to test their mechanical actuation properties for mirror-actuator prototypes. This article focuses on EAP-based actuator basic properties. Future work will explore how EAP sensors can be integrated into mirror systems.

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Advanced Plasticized Electroactive Polymers Actuators for Active Optical Applications: Live Mirror

et al. 2020

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The flexibility and semicrystalline structure of electroactive polymers (EAPs) allows a variety of electroactivity developments. The EAPs have been attractive in many sensor-actuator technology fields, especially for electromechanical response [1] in piezoelectric, electrostrictive, and ferroelectric materials. We characterize the response of these polymers to an external electric field with their 1) electrical properties (permittivity, dielectric relaxation, and electrical breakdown) and 2) mechanical properties (Young's modulus). [2] Both characteristics ultimately affect their electromechanical effectiveness. Customized and optimized EAPs have many applications such as rechargeable lithium-ion batteries, [3] enhancing cardiac regeneration, [4] haptic feedback, [5] and tactile sensors. [6] The development of different methods to achieve an excellent actuation response of EAPs was investigated in the polymer/ composite, [7] blended polymer, [8] and structural design [9,10] to improve intrinsic properties. Xia et al. [11] introduced a novel relaxor ferroelectric polymer, leading to the future improvement of EAPs for a broader range of electronic applications. Terpolymers P(VDF-TrFE-CFE/CTFE) presenting the combination of the ferroelectric-paraelectric phase yield a high dielectric constant (ϵ r % 70) and large electromechanical reaction. However, the main drawback of these polymers has been their high electric field requirement (E > 100 V μm À1 ) [12] to reach sufficient strain. Hence, the introduction of the terpolymer/composite including an effective fabrication processing/assembly has been investigated to enhance electromechanical effectiveness. [12,13] This motivates the investigation of advanced terpolymer composites by simply adding the plasticizer agent into the terpolymer matrix. The plasticizer molecule leads to the increased molecular mobility of the polymer chains, resulting in an increasing dielectric permittivity and a decrease in the Young's modulus of the material. The charge trapping at the boundaries of the heterogeneous morphology tends to induce large Maxwell-Wagner-Sillars (MWS) polarization effects. Such an adaptation technique is able to exploit electromechanical coupling through areas of functional sensor-actuator fabrication technology. [13] During the last 10 years, EAPs have been used in several actuator applications, such as artificial muscles, [14] micropumps, [15,16] and smart steerable guidelines. [17] As a result of their flexible and excellent electromechanical properties, EAPs have become attractive soft-actuator candidates in electronic devices. Furthermore, the free-formable attribute of EAPs presents the possibility to carry out numerous different designs. Considering the manufacturing process of piezoelectric and ferroelectric materials for

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Influence of Plasticizers on the Electromechanical Behavior of a P(VDF‐TrFE‐CTFE) Terpolymer: Toward a High Performance of Electrostrictive Blends

Cited by 21 publications

References 30 publications

Processing optimization: A way to improve the ionic conductivity and dielectric loss of electroactive polymers

Processing optimization: A way to improve the ionic conductivity and dielectric loss of electroactive polymers

Surface Correction Control Based on Plasticized Multilayer P(VDF‐TrFE‐CFE) Actuator—Live Mirror

Advanced Plasticized Electroactive Polymers Actuators for Active Optical Applications: Live Mirror

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