静电纺PA6/PET复合膜的制备及其空气过滤性能
Preparation of electrospun PA6/PET composite membranes and their air filtration properties
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摘要: 主要研究静电纺纳米/微米纤维复合膜(PA6/PET)的制备及其空气过滤性能,电纺了几种不同密集度的复合膜,研究了其对氯化钠粒子在特定条件下的过滤能力,进行了加载过滤测试,并通过扫描电子显微镜(SEM)对过滤前后纤维膜的表面形态进行观察.结果表明,对于多分散的NaCl粒子来说,过滤材料的过滤效率随着过滤时间的增加而增加.当增大过滤粒子流量时,过滤阻力与流量呈现线性增长关系,但是过滤效率变化不大.本实验中复合膜的最低过滤效率为99.990%.Abstract: In this study, we investigate the preparation of electrospun filters composed of a layer of nanofibers on a substrate made of micrometer fibers and their air filtration performance. Four different samples were prepared, and the filtration performance of electrospun filters was evaluated by measuring the penetration of monodisperse NaCl nanoparticles through the filters. Scanning electron microscope (SEM) was used to observe the differences of the surface of the fiber membranes before and after filtration. The results show that, the efficiency of the filters increasesd with the filtration time of the mondisperse NaCl nanoparticles. The pressure drop increased linearly with filtration velocity, but the efficiency of the filters did not change. The lowest efficiency of the composite filters is 99.990%.
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Key words:
- electrospinning /
- composite membrane /
- air filtration /
- NaCl
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