New substances and particles appearing in the environment following technological development pose new challenges for separation methods. Moreover, the growing amount of waste also forces us to look for environmentally friendly solutions. One way to create filtration structures with the desired properties is to combine known techniques, thanks to which the advantages of one technique complement the deficiencies and disadvantages of another. Combining the melt-blowing and solution-blowing processes seems to be promising. Fibres created from melt-blowing will provide mechanical strength, while solution-blowing will allow the introduction of nanofibres into the structure with unique filtration and functional properties. Both methods enable working with biodegradable polymers, so the resulting filter can also be environmentally friendly after operation. Our research aimed to check whether combining two fibre production techniques (melt-blown and solution-blowing) is possible and how the joining method will affect the final product. We created a multilayer structure by placing a layer of solution-blowing nanofibres between melt-blown layers, and a mixed structure by simultaneous melt-blowing and solution-blowing. The created multilayer structure was characterised by high filtration efficiency and high-pressure drop. In contrast, the mixed structure achieved a high-quality factor and high mass of deposited droplets per 1 J of energy used for work.

中文翻译：

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结合溶液发泡和熔喷技术生产高效的无纺过滤器

随着技术的发展，环境中出现的新物质和颗粒对分离方法提出了新的挑战。此外，越来越多的废物也迫使我们寻找环保的解决方案。创建具有所需特性的过滤结构的一种方法是结合已知技术，由此一种技术的优点弥补了另一种技术的缺陷和缺点。熔喷和溶液吹塑工艺的结合似乎很有前景。熔喷制成的纤维将提供机械强度，而溶液吹制将允许将纳米纤维引入具有独特过滤和功能特性的结构中。这两种方法都可以使用可生物降解的聚合物，因此所得过滤器在运行后也可以是环保的。我们的研究旨在检查两种纤维生产技术（熔喷和溶液吹）的结合是否可能，以及连接方法将如何影响最终产品。我们通过在熔喷层之间放置一层溶液吹制纳米纤维来创建多层结构，并通过同时熔喷和溶液吹制创建混合结构。所创建的多层结构具有高过滤效率和高压降的特点。相比之下，混合结构实现了高品质因数和每 1 J 用于做功的能量沉积的液滴的质量。