Title :
Preparation of porous PTFE/PE/PP composite electret and study of its charge storage stability
Author :
Song, S.M. ; Jiang, J. ; Cui, L.L. ; Wang, X.P. ; Xia, Z.F.
Author_Institution :
Coll. of Basic Med. Sci., Second Mil. Med. Univ., Shanghai, China
Abstract :
In this paper we introduced the preparing process and corona charging method of the porous PTFE/PE/PP composite electret film, and furthermore, studied its charge storage stability by using the method of isothermal surface potential decay measurement, open-circuit thermally stimulated discharge current spectra. It was shown that 1) charge storage stability for negative porous PTFE/PE/PP composite electret corona charged at high temperature was almost the same as that of porous PTFE electret charged at room temperature. 2) The charge storage stability of porous PTFE/PE/PP electret was closely related to the structure of porous PTFE and charging condition. 3) Porous PTFE/PE/PP electret exhibited higher charge storage stability than porous PTFE electret under high humidity.
Keywords :
biomedical materials; composite materials; corona; electrets; polymer films; porous materials; surface potential; thermally stimulated currents; 293 to 298 K; charge storage stability; corona charging method; isothermal surface potential decay measurement; open-circuit thermally stimulated discharge current spectra; porous polytetrafluoroethylene-polyethylene-polypropylene composite electret film; preparing process; room temperature; Charge measurement; Corona; Current measurement; Electrets; Humidity; Isothermal processes; Surface charging; Surface discharges; Temperature; Thermal stability;
Conference_Titel :
Electrets, 2005. ISE-12. 2005 12th International Symposium on
Print_ISBN :
0-7803-9116-0
DOI :
10.1109/ISE.2005.1612319
