驻极处理对聚乳酸熔喷材料性能的影响

纺织学报 ›› 2015, Vol. 36 ›› Issue (09): 13-17.

驻极处理对聚乳酸熔喷材料性能的影响

收稿日期:2014-09-11 修回日期:2014-11-14 出版日期:2015-09-15 发布日期:2015-09-14

Influence of corona electret treatment on melt-blow PLA nonwovens material

Received:2014-09-11 Revised:2014-11-14 Online:2015-09-15 Published:2015-09-14

摘要/Abstract

摘要：

采用生物可降解性聚乳酸（PLA）为原料，采用熔喷工艺开发一种高性能过滤材料，并利用外置式电晕放电技术对材料进行驻极处理。分析讨论了驻极电压、驻极时间以及两电极之间距离等工艺参数对材料的表面电位、透气性及过滤性能的影响。采用扫描电子显微镜观察了驻极处理后PLA熔喷材料表面形貌结构的变化。结果表明：驻极后PLA熔喷材料表面粗糙度增加；材料在驻极电压增加过程中出现反极性充电现象。随着驻极电压和时间的增加，材料表面静电电位逐渐增加，然后又呈现下降的趋势。驻极处理后材料的透气性未出现显著变化；过滤效率显著提高。

关键词: PLA, 熔喷非织造材料, 驻极, 电晕放电, 过滤性能

Abstract:

Biodegradable polylactic acid (PLA) was chosen as raw material to develop high performance melt-blown filter material and the material was electrified by the external corona discharge. The effect of treatment voltage, time and distance from top electrode to samples on the surface potential, gas-permeability and filtration efficiency of the filter materials were discussed. The change of surface morphology of the material was analyzed by SEM. The SEM images show that the roughness of PLA melt-blown non-woven materials increase after the electret treatment. The results show that the voltage increased, the polarity charging phenomenon appeared. With the increase of electret treatment time and voltage, the surface electrostatic potential increase and then tend to decay with the futher increase of voltage and time. After the electet treatment the air permeability of PLA melt-blown nonwoven materials kept unchanged，while filtration efficiency increased significantly.

Key words: PLA, melt-blown nonwoven material, electret, corona discharge, filtration efficiency

中图分类号:

任煜李猛尤祥银. 驻极处理对聚乳酸熔喷材料性能的影响[J]. 纺织学报, 2015, 36(09): 13-17.

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