厚度对多孔PTFE／PE／PP驻极体电荷储存稳定性的影响

Influence of Thickness on the Charge Storage Stability for Porous PTFE/PE/PP Film Electrets

研究由不同厚度多孔聚四氟乙烯(PTFE)组成的多孔PTFE／聚乙烯(PE)／聚丙烯(PP)驻极体的电 荷储存稳定性．通过热融法和电晕充电技术将多孔PTFE,PE,PP复合膜制备成驻极体,并采用等温表面电 位衰减测量、电荷TSD和扫描电子显微镜研究多孔PTFE／PE／PP驻极体的电荷储存稳定性．结果表明:较厚的 多孔PTFE组成的多孔PTFE／PE／PP驻极体在低温区呈现出较好的电荷储存能力;多孔PTFE的孔洞越多,由 其组成的多孔PTFE／PE／PP驻极体在高温区的电荷储存能力越强;在高湿环境下,多孔PTFE／PE／PP驻极体比 多孔PTFE驻极体显示出更好的电荷储存稳定性．

The charge storage stability investigate has been for porous polytetrafluoroehtylene(PTFE) /polyethylene (PE)/polypropylene(PP) electret film.The porous PTFE, PE, and PP were made into the porous PTFE / PE/PP electret by means of heat melting and corona charging. The charge storage stability of the electret was measured by using methods of isothermal surface potential decay, charge TSD and scanning electron microscope. The Results show that the porous PTFE/PE/PP electret prepared from thicker porous PTFE showed better charge storage stability at low temperature area. The more of the porosity for the porous PTFE, the better charge storage stability of the porous PTFE/PE/PP electret at high temperature area. The porous PTFE/PE/PP electret exhibited more excellent charge storage stability than porous PTFE electret under the high humidity circumstance.