The electret characteristics of polypropylene (PP) nonwoven fabrics processed by melt-blowing and its composites with 2 vol% of silicon dioxide (SiO2) are studied in this work. The surface potential Ve, effective surface charge density aef and electric field strengths E as well as their filtration efficiency are reported. Improvement of electret properties of PP filled with SiO2 in comparison with the samples without filler is observed. It is seen that PP samples poled in a corona discharge show lower filtration rate than the non-poled ones. The electret nonwoven fabrics with improved filtration characteristics are obtained on the basis of PP with SiO2 inclusions.

中文翻译：

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聚丙烯基非织造布及其含有2 vol%二氧化硅夹杂物的复合材料的驻极体和过滤性能研究

本工作研究了熔喷处理的聚丙烯（PP）非织造布及其与 2 vol% 二氧化硅（SiO2）复合材料的驻极体特性。报告了表面电位 Ve、有效表面电荷密度 aef 和电场强度 E 以及它们的过滤效率。观察到与不含填料的样品相比，填充有 SiO2 的 PP 的驻极体性能有所改善。可以看出，在电晕放电中极化的 PP 样品显示出比非极化样品更低的过滤速率。具有改进过滤特性的驻极体非织造布是以含有 SiO2 夹杂物的 PP 为基础获得的。