Cellular ferroelectrets for electroactive polymer hybrid systems: soft matter integrated devices with advanced functionality

Reinhard Schwödiauer; Ingrid Graz; Martin Kaltenbrunner; Christoph Keplinger; Petr Bartu; Gerda Buchberger; Christoph Ortwein; Siegfried Bauer

doi:10.1117/12.779363

10 April 2008 Cellular ferroelectrets for electroactive polymer hybrid systems: soft matter integrated devices with advanced functionality

Reinhard Schwödiauer, Ingrid Graz, Martin Kaltenbrunner, Christoph Keplinger, Petr Bartu, Gerda Buchberger, Christoph Ortwein, Siegfried Bauer

Author Affiliations +

Proceedings Volume 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008; 69270Q (2008) https://doi.org/10.1117/12.779363
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

Thin polymer foams with a closed cell void-structure can be internally charged by silent or partial discharges within the voids. The resulting material, which carries positive and negative charges on the internal void surfaces is called a ferroelectret. Ferroelectrets behave like typical ferroelectrics, hence they provide a novel class of ferroic materials. The soft foams are strongly piezoelectric in the 3-direction, but show negligible piezoelectric response in the transverse direction. This, together with a very low pyroelectric coefficient, make ferroelectrets highly suitable for flexible electroactive transducer element which can be integrated in thin bendable organic electronic devices. Here we describe some fundamental characteristics of cellular ferroelectrets and present a number of promising examples for a possible combination with various functional polymer systems. Our examples focus on flexible ferroelectret field-effect transistor systems for large-area sensor skins and microphones, flexible large-array position detectors (touchpad), and stretchable large-array pressure sensors.

Citation Download Citation

Reinhard Schwödiauer, Ingrid Graz, Martin Kaltenbrunner, Christoph Keplinger, Petr Bartu, Gerda Buchberger, Christoph Ortwein, and Siegfried Bauer "Cellular ferroelectrets for electroactive polymer hybrid systems: soft matter integrated devices with advanced functionality", Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 69270Q (10 April 2008); https://doi.org/10.1117/12.779363

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