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首页> 外文期刊>Separation and Purification Technology >Multilevel structured polyacrylonitrile/silica nanofibrous membranes for high-performance air filtration
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Multilevel structured polyacrylonitrile/silica nanofibrous membranes for high-performance air filtration

机译：用于高效空气过滤的多层结构聚丙烯腈/二氧化硅纳米纤维膜

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摘要

As engineers strive to develop high-performance filtration membranes with structural alternatives, the challenges and costs of processing often limit creative innovation. Here, we describe a powerful yet economic strategy for fabricating multilevel structured nanofibrous membranes within a single filter medium, which is constructed by the accumulation of bimodal sized and silica nanoparticles (SiO2 NPs) incorporated electrospun polyacrylonitrile (PAN) nanofibrous membranes. By simply varying the composition of precursor solutions and layer-by-layer assisted stacking structure, individual fibers within the medium can conformally be endowed with non-circular cross section, or rough surface to form a skeletal frame-worked membrane with complimentary filtration efficiency (99.989%) and pressure drop (117 Pa) for 300-500 ran NaCl aerosol particles. The results suggested that this cost-effective filter media could be used as promising materials for a variety of potential applications in respiratory protection equipment, high efficiency particulate air filters, and ultra-low penetration air filters.
机译：随着工程师努力开发具有替代结构的高性能滤膜，加工的挑战和成本通常会限制创新。在这里，我们描述了一种在单一过滤介质中制造多层结构化纳米纤维膜的有力而经济的策略，该策略是由双峰尺寸和二氧化硅纳米颗粒（SiO2 NPs）的结合并入电纺聚丙烯腈（PAN）纳米纤维膜而构成的。通过简单地改变前体溶液的组成和逐层辅助的堆叠结构，介质中的单根纤维可以共形地具有非圆形横截面或粗糙表面，从而形成具有良好过滤效率的骨架骨架膜99.989％）和300-500 ran NaCl气溶胶颗粒的压降（117 Pa）。结果表明，这种经济高效的过滤介质可用作呼吸防护设备，高效颗粒空气过滤器和超低渗透空气过滤器中各种潜在应用的有前途的材料。

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