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首页> 外文期刊>Journal of Applied Polymer Science >Electret characteristics of melt-blown polylactic acid fabrics for air filtration application
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Electret characteristics of melt-blown polylactic acid fabrics for air filtration application

机译：用于空气过滤施用熔喷聚乳酸织物的驻极体特性

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摘要

Polylactic acid (PLA) is a biodegradable and biocompatible polymer. Melt-blown PLA electret fabrics have become attractive materials for air filter applications. Its filtration performance mainly depends on the electrostatic effect originating from electrets. How to improve their electret behavior and then to enhance their filtration efficiency has always been challenging. In this article, three melt-blown PLA fabrics with different morphological or crystal structure are made from different process conditions or ingredient. The electrets are formed by means of corona charging technology. Their crystalline and morphological structure was analyzed, and filtration performance was measured. Their charge-trapping feature was studied by thermal stimulating discharge technology. The results proved that the air filtration efficiency of three melt-blown samples improved a lot when electrets were formed. Different crystalline structures of PLA fabrics will result in differences in their electret charge-trapping feature. The PLA fabrics with semi-crystalline characteristics display a regular charge-trapped level distribution and amorphous structure hints the diversity of charge-trapped levels. The deference in filtration resistance is mainly ascribed to the different fiber diameters and their distributions. More narrow distribution of fiber diameter leads to more compact fabrics and to higher filtration resistance. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48309.
机译：聚乳酸（PLA）是一种可生物降解和生物相容性的聚合物。熔喷PLA驻极体织物已成为空气过滤器应用的吸引力。其过滤性能主要取决于源自驻极体的静电效果。如何提高其驻极体行为，然后提高其过滤效率一直在具有挑战性。在本文中，具有不同形态或晶体结构的三种熔喷PLA织物由不同的工艺条件或成分制成。通过电晕充电技术形成电器。分析了它们的结晶和形态结构，并测量过滤性能。通过热刺激放电技术研究了它们的电荷捕获功能。结果证明，当形成电体时，三个熔喷样品的空气过滤效率提高了很多。 PLA织物的不同晶体结构将导致其驻极体电荷捕获特征的差异。具有半晶特性的PLA织物显示常规电荷捕获的水平分布和非晶结构，提示了电荷捕获的水平的多样性。过滤电阻的偏见主要归因于不同的纤维直径及其分布。纤维直径的更窄分布导致更紧凑的织物和更高的过滤性。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48309。

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