Electrospun nanofibers for high-performance air filtration

The development of air filtration materials (AFMs) has drawn increasing research interest due to the fact that air pollution is posing an enormous threat to human health on a global scale. However, the fabrication of AFMs with both high filtration efficiency and low pressure drop remains a challenge. Owing to the advantages of small fiber diameter, tunable porous structure, and substantial charges in situ injected, electrospun nanofibers have emerged as one of the most promising candidates for AFMs. In this review, universal strategies for preparing high-performance electrospun AFMs (EAFMs) are concluded, involving the construction of structures and the enhancement of electrostatic effect. For the structures, not only the two-dimensional membranes that composed of smooth fibers and hierarchically structured fibers but also the recently developed three-dimensional nanofibrous aerogels are comprehensively summarized. As to the electrostatic effect, two primary techniques for fabricating charged EAFMs are discussed. This review finally concludes with challenges and perspectives, aiming to provide practical guidance for the further development of EAFMs.

由于空气污染在全球范围内对人类健康构成巨大威胁，因此空气过滤材料（AFM）的开发引起了越来越多的研究兴趣。然而，具有高过滤效率和低压降的AFM的制造仍然是挑战。由于纤维直径小，可调节的多孔结构和原位注入大量电荷的优势，电纺纳米纤维已成为AFM最有希望的候选者之一。在这篇综述中，总结了制备高性能电纺原子力显微镜（EAFM）的通用策略，包括结构的构造和静电效应的增强。对于结构，不仅对由光滑纤维和分层结构的纤维组成的二维膜，而且对最近开发的三维纳米纤维气凝胶也进行了全面总结。关于静电效应，讨论了两种用于制造带电EAFM的主要技术。这篇综述最后以挑战和观点结束，旨在为EAFM的进一步发展提供实用指导。

Published: 2019

Journal ：COMPOSITES COMMUNICATIONS

Impact Factor：4.915

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S2452213919300622