Filtration systems used in technical and medical applications require components for fine particle deep filtration to be highly efficient and at the same time air permeable. In high efficiency filters, nonwoven meshes, which show increased performance based on small fiber diameters (e.g., using nanofibers), can be used as fine particle filter layers. Nanofiber nonwoven meshes made by electrospinning of spider silk proteins have been recently shown to exhibit required filter properties. Needle-based electrospinning, however, is limited regarding its productivity and scalability. Centrifugal electrospinning, in contrast, has been shown to allow manufacturing of ultrathin polymer nonwoven meshes in an efficient and scalable manner. Here, continuous roll-to-roll production of nonwoven meshes made of recombinant spider silk proteins is established using centrifugal electrospinning. The produced spider silk nanofiber meshes show high filter efficiency in the case of fine particulate matter below 2.5 µm (PM2.5) and a low pressure drop, resulting in excellent filter quality.

中文翻译：

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使用离心静电纺丝进行过滤应用的蜘蛛丝纳米纤维非织造布网的卷对卷生产

技术和医疗应用中使用的过滤系统要求用于细颗粒深度过滤的组件既高效又透气。在高效过​​滤器中，基于小纤维直径（例如，使用纳米纤维）表现出更高性能的无纺网可用作细颗粒过滤层。通过静电纺丝蜘蛛丝蛋白制成的纳米纤维非织造网最近已被证明具有所需的过滤性能。然而，基于针的静电纺丝在其生产力和可扩展性方面受到限制。相比之下，离心静电纺丝已被证明可以以高效和可扩展的方式制造超薄聚合物非织造布网。这里，使用离心静电纺丝建立了由重组蜘蛛丝蛋白制成的无纺布网的连续卷对卷生产。生产的蜘蛛丝纳米纤维网在2.5μm以下的细颗粒物（PM2.5）的情况下过滤效率高，压降低，过滤质量优异。