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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Microwave structured polyamide-6 nanofiberet membrane with embedded poly(m-phenylene isophthalamide) staple fibers for effective ultrafine particle filtration
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Microwave structured polyamide-6 nanofiberet membrane with embedded poly(m-phenylene isophthalamide) staple fibers for effective ultrafine particle filtration

机译：微波结构的聚酰胺6纳米纤维/网膜，内嵌聚间苯二甲酰间苯二甲酰胺短纤维，可有效过滤超细颗粒

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摘要

Effective air filtration proposed for fibers requires their assembly into a porous structure with small pore size, low packing density, and controllable macro-structure; however, creating such filtration media has proved to be a grand challenge. Here, we introduce a strategy to create microwave structured polyamide-6/poly(m-phenylene isophthalamide) nanofiberet (PA-6/PMIA NFN) membranes for effective air filtration by combining the electro-spinningetting (ESN) and staple fiber intercalating process. Our approach causes the PA-6 NFN membrane composed of one-dimensional (1D) nanofibers and 2D Steiner-tree nanonets, and the embedded PMIA staple fibers, to assemble into a stable filtration medium with tunable pore size, packing density, and microwave fluctuation by facilely optimizing binary fiber construction and extrinsic staple fiber intercalation. By virtue of the integrated structural properties of small pore size (similar to 0.32 mu m), high porosity (91.3%), and extended surface area, the resulting PA-6/PMIA NFN filter can effectively filter ultrafine airborne particles, mainly using physical sieving, with high filtration efficiency of 99.995%, low pressure drop of 101 Pa, desirable quality factor of 0.1 Pa-1, and large dust-holding capacity of >50 g m(-2), which match well with the requirements for treating the real particulate matter (PM) pollutions. This work would not only provide great potential for PM2.5 governance, but also open new avenues for the design and development of stable porous membranes with controllable macrostructures for various applications.
机译：提议对纤维进行有效的空气过滤需要将其组装成具有小孔径，低堆积密度和可控宏观结构的多孔结构。然而，事实证明，创建这种过滤介质是一项巨大的挑战。在这里，我们介绍一种通过结合电纺/拉网（ESN）和订书钉来创建微波结构的聚酰胺-6 /聚（间苯二甲酰间苯二甲酰胺）纳米纤维/网（PA-6 / PMIA NFN）膜的策略，以进行有效的空气过滤。纤维嵌入过程。我们的方法使由一维（1D）纳米纤维和2D Steiner-tree纳米网以及嵌入的PMIA短纤维组成的PA-6 NFN膜组装成具有可调孔径，堆积密度和微波波动性的稳定过滤介质通过轻松优化二元纤维的结构和外部短纤维的嵌入。由于具有小孔径（约0.32微米），高孔隙率（91.3％）和扩展的表面积的综合结构特性，所得的PA-6 / PMIA NFN过滤器可有效过滤超细空气传播颗粒，主要使用物理方法筛分，过滤效率高达99.995％，压降低至101 Pa，理想的品质因数为0.1 Pa-1，大的容尘量> 50 gm（-2），非常适合处理实际颗粒物（PM）污染。这项工作不仅将为PM2.5治理提供巨大潜力，而且还将为设计和开发具有可控宏观结构的稳定多孔膜的各种应用开辟新的途径。

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