Branched nanofibers with tiny diameters for air filtration via one-step electrospinning

Engineering the surface morphology of fibers has been attracting significant consideration in various areas and applications. In this study, polyvinylidene fluoride (PVDF) branched nanofibers with a diameter of less than 50 nm are electrospun directly at a low relative humidity by adding tetrabutylammonium chloride. The effects of the branched structure on the specific surface area and pore size distribution are investigated, and the filtration properties of the air filter based on branched nanofiber webs with different basis weights are studied. The results exhibit that the air filter based on PVDF branched nanofibers with the basis weight of 1 g/m(2) has an outstanding filtration efficiency (99.999%) to 0.26 mu m sodium chloride particles under the pressure drop of 126.17 Pa. We believe that this study can be used as a useful reference for the preparation of branched nanofibers through one-step electrospinning.

对纤维的表面形态进行工程设计已在各个领域和应用中引起了广泛的关注。 在这项研究中，通过添加四丁基氯化铵，可在较低的相对湿度下直接电纺直径小于50 nm的聚偏二氟乙烯（PVDF）支化纳米纤维。 研究了支链结构对比表面积和孔径分布的影响，并研究了具有不同基重的支链纳米纤维网的空气过滤器的过滤性能。 结果表明，基于PVDF支化纳米纤维的基重为1 g / m（2）的空气过滤器在126.17 Pa的压降下，对0.26μm氯化钠颗粒具有出色的过滤效率（99.999％）。 这项研究可以作为一步一步电纺制备支链纳米纤维的有用参考。

Published: 2020

Journal ：JOURNAL OF INDUSTRIAL TEXTILES

Impact Factor：2.455

Paper link: https://journals.sagepub.com/doi/abs/10.1177/1528083720923773