TY  - JOUR
A1  - Wegener, Michael
A1  - Wirges, Werner
A1  - Tiersch, Brigitte
T1  - Porous polytetrafluoroethylene (PTFE) electret films : porosity and time dependent charging behaviour of the free surface
N2  - Electrically charged porous polytetrafluoroethylene (PTFE) films are often discussed as active layers for electromechanical transducers. Here, the electric charging behavior of open-porous PTFE films with different porosities is investigated. Optimized electric charging of porous PTFE films is determined by variation of charging parameters such as electric fields and charging times. Maximum surface potentials are depending on the porosity of the PTFE films. Suitable charging leads to high surface potentials observed on non-stretched or slightly stretched porous PTFE films. Further increase of charging fields yields decreasing values of the surface potential accompanied with an increase of conductivity.
Y1  - 2006
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/11349
UR  - http://www.springerlink.com/content/601u86x365560515/
ER  -