Polyacrylonitrile microscaffolds assembled from mesh structures of aligned electrospun nanofibers as high-efficiency particulate air filters
Polyacrylonitrile microscaffolds assembled from mesh structures of aligned electrospun nanofibers as high-efficiency particulate air filters
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DOI：
10.1080/02786826.2016.1171822
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发表时间：
2016-01-01
影响因子：
5.2
通讯作者：
Chen, Jem-Kun
中科院分区：
文献类型：
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作者：
Kao, Tzu-Hao;Su, Shuenn-Kung;Chen, Jem-Kun
非常小直径的电纺聚丙烯腈（PAN）纤维具有集成到能够提高颗粒过滤效率的过滤器中的潜力。为了满足具有合理压降的高效微粒空气（HEPA）过滤器的要求，我们通过在各种旋转速率下的预对准和随后的负载下的溶剂蒸气退火（SVA）来产生对准的静电纺丝PAN纤维。我们评估了由排列的静电纺丝PAN纤维以线性、正方形和三角形多个网格的形式组装的微支架过滤器的性质。具有多个正方形网孔的微支架表现出显著增加的过滤效率，而没有显著的压降。九层交叉层结构提供了一个过滤效率为99.98%的0.25 μ m的颗粒在10厘米秒（-1）的面速度，其过滤品质因数是所有测试的微支架中最高的。因此，可以使用PAN纤维实现具有低填充密度的HEPA过滤器。
Electrospun polyacrylonitrile (PAN) fibers of very small diameters have potential for integration into filters capable of increasing the particle filtration efficiency. To fulfill the requirements for high-efficiency particulate air (HEPA) filters with a reasonable pressure drop, we generated aligned electrospun PAN fibers through pre-alignment at various rotation rates and subsequent solvent vapor annealing (SVA) under a loading. We evaluated the properties of microscaffold filters assembled from aligned electrospun PAN fibers in the form of linear, square, and triangular multiple meshes. The microscaffolds featuring multiple square meshes exhibited dramatically increased filtration efficiency without a significant pressure drop. A nine-layer cross-ply structure provided a filtration efficiency of 99.98% for 0.25-mu m particles at a face velocity of 10 cm s(-1); its filtration quality factor was the highest among all of the tested microscaffolds. Thus, HEPA filters featuring a low packing density can be achieved using PAN fibers.