Title :
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
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.641114
