Preparation, characterization and sensor properties of ferroelectric and porous fluoropolymers

Author

Danz, R. ; Elling, B. ; Büchtemann, A. ; Mirow, P.

Author_Institution

Fraunhofer Inst. for Appl. Polymer Res., Golm, Germany

fYear

2002

fDate

2002

Firstpage

199

Lastpage

202

Abstract

Ferroelectric copolymers of vinylidene fluoride and trifluoroethylene [P(VDF/TrFE)] have a strong piezoelectric and pyroelectric effect with a high potential for sensor and transducer applications. Porous polytetrafluoroethylene (PTFE) exhibits excellent electret properties and is suitable for transducer applications based on its macroscopic piezoelectricity. In this work the preparation of piezoelectric P(VDF/TrFE) films onto flexible as well as on any shaped printed circuits achieved through a spray technique from the polymer solution is reported. Results on array sensors, measuring dynamic pressure in air flow field monitoring as well as dynamic force measurements, are presented. Electret transducers made by porous PTFE are prepared and their sensor properties are described.

Keywords

electrets; ferroelectric thin films; flow measurement; materials preparation; piezoelectric thin films; piezoelectric transducers; polymer blends; polymer films; porous materials; pressure sensors; spray coating techniques; spray coatings; air flow field monitoring; array sensors; dynamic force measurements; dynamic pressure measurements; electret properties; ferroelectric copolymers; ferroelectric fluoropolymers; flexible printed circuits; piezoelectric effect; polymer preparation; polytetrafluoroethylene; porous PTFE; porous fluoropolymers; pyroelectric effect; sensor properties; spray technique; transducer applications; trifluoroethylene; vinylidene fluoride; Electrets; Ferroelectric materials; Force measurement; Piezoelectric films; Piezoelectric transducers; Piezoelectricity; Polymer films; Pyroelectricity; Sensor arrays; Sensor phenomena and characterization;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on

Print_ISBN

0-7803-7560-2

Type

conf

DOI

10.1109/ISE.2002.1042978

Filename

1042978