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利用在室温和高温下的栅控恒压电晕充电 ,常温电晕充电后经不同温度老化处理后的表面电位衰减测量 ,及开路热刺激放电 (ThermallyStimulatedDischarge ,TSD)研究了正负充电后PTFE(Polytetrafluoroethylene)多孔薄膜驻极体的电荷储存稳定性 .PTFE多孔膜 ,PTFE非多孔膜 (TeflonPTFE)和FEP(Tetrafluoroethylene hexa fluoropropyleneCopoly mer)非多孔膜 (TeflonFEP)间的电荷储存稳定性的比较研究也已进行 .通过等温退极化程序 ,对上述三种薄膜驻极体的电荷储存寿命 (有效时间常数 )τ进行了定量估算 .结果指出 :在有机驻极体材料中 ,对正负充电后两种极性驻极体样品的PTFE多孔薄膜驻极体均呈现最优异的电荷储存稳定性 ,尤其是在高温条件下 .通过扫描电镜 (SEM)对这种新结构的氟聚合物驻极体材料的突出电荷储存能力和结构根源也已初步讨论 .
The effects of the positive and negative charge on the surface morphology of PTFE (after positive and negative charge) were investigated by measuring the surface potential attenuation after aging at different temperatures after corona charging at room temperature and high temperature, and using the Thermally Stimulated Discharge (TSD) Polytetrafluoroethylene Comparative study of charge storage stability of porous membrane electret Comparative study of charge storage stability between PTFE porous membrane, PTFE non-porous membrane (TeflonPTFE) and FEP (TeflonFEP) has also been conducted Through the isothermal depolarization program, the charge storage lifetimes (effective time constants) τ of the three film electrets were quantitatively evaluated.The results show that in the organic electret materials, The electrets of the electret electret samples exhibited the best charge storage stability, especially at high temperature.The prominence of this new structure of the fluoropolymer electret material by scanning electron microscopy (SEM) The charge storage capacity and structural origin have also been tentatively discussed.