Advanced Plasticized Electroactive Polymers Actuators for Active Optical Applications: Live Mirror. Issue 5 (28th February 2020)

• Record Type: Journal Article
• Authors: Thetpraphi, Kritsadi; Chaipo, Suphita; Kanlayakan, Waroot; Cottinet, Pierre-Jean; Le, Minh Quyen; Petit, Lionel; Audigier, David; Kuhn, Jeff; Moretto, Gil; Capsal, Jean-Fabien
• Is Part Of: Advanced engineering materials. Volume 22:Issue 5(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-02-28
• Subjects: active optics -- actuator applications -- astronomy and optical communication applications -- deformable mirrors -- modified electroactive polymers -- multilayer actuators -- plasticized terpolymers; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201901540
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : Herein, an advanced concept to enhance the actuation ability of electroactive polymers (EAPs) based on modified terpolymer P(VDF‐TrFE‐CFE) is proposed. Such a polymer matrix attracts a great deal of attention because of its outstanding electromechanical coupling property, particularly when doped with plasticizers, e.g., diisononyl phthalate (DINP). Herein, it is demonstrated that by optimizing the structure's multilayer design, the electromechanical coupling of the modified terpolymer is enhanced with its high dielectric permittivity, low Young's modulus, and exceptional dielectric strength. This leads to a large strain response as well as a high mechanical energy density at relatively low electric fields according to the electrostriction phenomena. The concept of stacked multilayers is demonstrated as a simple and effective technique to boost the actuation abilities. Experimental results in accordance with numerical models show actuator performance with a large electromechanical response. This technology shows feasibility for active optical surface shape control. The potential of multiple‐stack actuators is tested in a small prototype. This demonstrated mirror optical shape control and correction with a few degrees of freedoms. The proposed Live Mirror technology is useful for ground‐ and space‐based astronomy and communications telescopes. Abstract : Live Mirror recently reported the idea of active optical surface correction using the advantage of an electromechanical stimulator‐based modified terpolymer to deform mirror surface in a significant correction scale. The local correction prototype named shear actuator is developed to shape the glass by the assistance of multilayered plasticized terpolymer which provides an outstanding electromechanical coupling under low applied electric fields.