Development of high efficiency nanofilters made of nanofibers
Development of high efficiency nanofilters made of nanofibers
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DOI：
10.1016/j.cap.2005.07.013
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发表时间：
2006-10-01
影响因子：
2.4
通讯作者：
Lee, J. K.
中科院分区：
文献类型：
--
作者：
Ahn, Y. C.;Park, S. K.;Lee, J. K.
静电纺丝是一种利用电场控制聚合物纤维沉积到目标基材上的制造工艺。这种静电处理策略可用于制造纤维直径范围从几微米到 100 纳米或更小的纤维聚合物垫。在本研究中，研究了使用尼龙 6 生产纳米纤维的优化条件，并设计了使用直径 80-200 nm 纳米纤维的尼龙 6 纳米过滤器，并评估了过滤器的过滤效率和压降。当尼龙6浓度为15 wt.%时，电纺纤维平均直径为80 nm，但有很多珠子，浓度增加到24 wt.%时，纤维直径逐渐粗化至200 nm，但没有珠子。当纺丝距离小时，产生的纳米纤维越细，接地电极上收集的纤维越多。使用 0.3 μm 测试颗粒，面速度为 5 cm/s 时，尼龙 6 纳米过滤器的过滤效率比商用 HEPA 过滤器高出 99.993%。尽管纳米过滤器的压力下降，但它们显示出应用 HEPA 和 ULPA 级高效过滤器的潜力。 (c) 2005 Elsevier B.V. 保留所有权利。
Electrospinning is a fabrication process that uses an electric field to control the deposition of polymer fibers onto a target substrate. This electrostatic processing strategy can be used to fabricate fibrous polymer mats composed of fiber diameters ranging from several microns down to 100 nm or less. In this study, optimized conditions to produce nanofibers using Nylon 6 are investigated and the Nylon 6 nanofilters using nanofibers of 80-200 nm in diameter are designed and evaluated the filtration efficiency and pressure drop across the filter. When the Nylon 6 concentration is 15 wt.%, electrospun fibers have an average diameter of 80 nm, but there are many beads, and the concentration increases to 24 wt.%, the fiber diameter gradually thickens to 200 nm, but there are not any beads. When the spinning distance is small, the thinner nanofibers are produced and the more fibers are collected on the grounded electrode. The filtration efficiency of Nylon 6 nanofilters is 99.993% superior to the commercialized HEPA filter at the face velocity of 5 cm/s using 0.3 mu m test particles. Even though the high pressure drops across the nanofilter, they show the potential to have the application of HEPA and ULPA grade high efficiency filter. (c) 2005 Elsevier B.V. All rights reserved.