乙烯/四氟乙烯共聚物薄膜驻极体的电荷储存稳定性

Charge storage stability in poly(ethylene/tetrafluoroethylene) film electrets

研究了经栅控恒压电晕充电的乙烯/四氟乙烯共聚物(ETFE)驻极体的电荷稳定性,并将其与几种重要的驻极体材料的储电性能进行了比较。结果显示,ETFE薄膜驻极体具有优良的电荷储存稳定性,负极性ETFE的电荷稳定性明显优于正极性样品。热处理工艺能明显改善ETFE驻极体的电荷储存寿命。本文还估算出两种极性ETFE驻极体的陷阱能级的活化能,阐明脱阱电荷的输运特性。

The charge storage stability of poly（ethylene/tetrafluoroethylene）（ETFE） electrets after constant voltage corona charging was studied. The comparison of the charge stability of ETFE and that of several important electret materials was investigated. It is found that the charge stability of ETFE electret is very good,and the stability of negatively charged ETFE is much better than that of positively charged ETFE. The charge storage lifetime can be obviously improved after heating treatment. The activation energy of positive- and negativecharged ETFE electrets was estimated, and at the same time , the characteristic of the transport of detrapped charges for ETFE electret was discussed.