Enhanced electromechanical performance of cellular polypropylene electrets charged at a high temperature
Enhanced electromechanical performance of cellular polypropylene electrets charged at a high temperature
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DOI：
10.1088/0022-3727/44/41/415403
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
J. Zhang;L. Lebrun;B. Guiffard;R. Belouadah;D. Guyomar;L. Garbuio;P. Cottinet;Q. Liu
中科院分区：
文献类型：
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作者：
J. Zhang;L. Lebrun;B. Guiffard;R. Belouadah;D. Guyomar;L. Garbuio;P. Cottinet;Q. Liu
为了提高聚丙烯（PP）驻极体的机电性能，在电晕极化过程中对蜂窝PP驻极体进行高温加热，以加速其化学结构的变化，增加驻极体内形成偶极子的数量。我们研究了电晕极化后的表面电位衰减行为，结果表明，高温下的电晕极化可以改善商用蜂窝状聚丙烯的电荷保留。热刺激去极化电流的结果表明，电晕极化后蜂窝状聚丙烯驻极体中电荷的局部化状态不同。然后，通过变形测量系统测量增强的机电能力，在中等外加电场强度（30 MV m−1）下获得大应变（约5%）。
In order to enhance the electromechanical performance of polypropylene (PP) electrets, cellular PP electrets were heated during corona poling at a high temperature in order to accelerate its chemical structure change and increase the quantity of formed dipole within the electrets. We investigated the behaviour of surface potential decay after corona poling, and the results showed that corona poling at a high temperature can improve the charge retention of commercially used cellular PP. The results of thermally stimulated depolarization current indicated the different localized states of the electric charges in cellular PP electrets after corona poling. Then, enhanced electromechanical ability was measured by a deformation measurement system and large strain (about 5%) under a moderate applied electric field intensity (30 MV m−1) was obtained.