Electret properties for porous polytetrafluoroethylene (PTFE) film

Author

Xia, Zhongfu ; Jian, Jiang ; Zhang, Yewen ; Cao, Yang ; Wang, Zhenzhong

Author_Institution

Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China

Volume

2

fYear

1997

fDate

19-22, Oct 1997

Firstpage

471

Abstract

In this paper, a porous (aperture from 1 to 5 μm, porosity 50%) polytetrafluoroethylene (PTFE) was prepared by stretching with biparous orientation, which can be used in clinical medicine for encouraging the recovery of wounded tissues of the human body. Influence of environmental humidity on charge stability for the porous PTFE was investigated after constant voltage corona charging. The comparison of the charge storage ability of the porous PTFE film and the solid PTFE film charged at room and elevated temperatures was carried out. The transport property of detrapped charges during thermally stimulated discharge was also studied by means of Thermally Stimulated Discharge (TSD) method and heat pulse technique

Keywords

electrets; polymer films; porous materials; thermally stimulated currents; biparous orientation; charge stability; charge storage; charge transport; clinical medicine; corona charging; electret; elevated temperature; environmental humidity; heat pulse technique; human body; polytetrafluoroethylene; porous PTFE film; stretching; thermally stimulated discharge; wounded tissue; Biological materials; Biomedical materials; Electrets; Humans; Humidity; Material storage; Physics; Stability; Temperature; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on

Conference_Location

Minneapolis, MN

Print_ISBN

0-7803-3851-0

Type

conf

DOI

10.1109/CEIDP.1997.641114

Filename

641114