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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.8 P.923-927


Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets

Author(s):  CHEN Gang-jin, XIAO Hui-ming, ZHU Chun-feng

Affiliation(s):  Institute of Functional Material Research, Zhejiang University of Science and Technology, Hangzhou 310027, China

Corresponding email(s):   cgjin@zust.edu.cn

Key Words:  Polymer electrets, Charge dynamics, Material microstructure

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CHEN Gang-jin, XIAO Hui-ming, ZHU Chun-feng. Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets[J]. Journal of Zhejiang University Science A, 2004, 5(8): 923-927.

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T1 - Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets
A1 - CHEN Gang-jin
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In this work, the charge dynamics characteristics of injection, transport and decay in porous and non-porous polytetrafluoroethylene (PTFE) film electrets were investigated by means of corona charging, isothermal and thermal stimulating surface-potential decay measurements. The results showed that the initial surface potential, whether positively or negatively charging, is much higher in non-porous PTFE than in porous PTFE. For porous film the value of initial surface potentials increases with increase of film thickness. Higher charging temperature can remarkably improve charge stability. The charge dynamics are correlated to materials microstructure according to their scanning electron micrographs. For non-porous PTFE films, polarizability change of C-F bonds is the main origin of electret charges; but for porous PTFE film a large number of bulk and interface type traps are expected because of the greater area of interface and higher crystallinity.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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T. Yovcheva@Assoc. prof. Dr<temiov@uni-plovdiv.bg>

2010-10-25 02:20:56

I am interested in voided polymer films. Please, send me full text of this paper. It will be vwry intwrwsting for my work in the Plovdiv University, Bulgaria

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