Nanotechnology

Air filter

Mathematics

Membrane

Indoor air quality

Porosity

Air permeability specific surface

Statistics

Filtration (mathematics)

Electrospinning

Engineering

Composite material

Chemistry

Materials science

Inlet

Layer (electronics)

Air filtration

Chemical engineering

Polymer

Biochemistry

Mechanical engineering

Environmental engineering

Nanofiber

ACS Applied Materials & Interfaces

Air filtration materials (AFMs) have gradually become a research hotspot on account of the increasing attention paid to the global air quality problem. However, most AFMs cannot balance the contradiction between high filtration efficiency and low pressure drop. Electrospinning nanofibers have a large surface area to volume ratio, an adjustable porous structure, and a simple preparation process that make them an appropriate candidate for filtration materials. Therefore, electrospun nanofibers have attracted increased attention in air filtration applications. In this paper, first, the preparation methods of high-performance electrospun air filtration membranes (EAFMs) and the typical surface structures and filtration principles of electrospun fibers for air filtration are reviewed. Second, the research progress of EAFMs with multistructures, including nanoprotrusion, wrinkled, porous, branched, hollow, core–shell, ribbon, beaded, nets structure, and the application of these nanofibers in air filtration are summarized. Finally, challenges with the fabrication of EAFMs, limitations of their use, and trends for future developments are presented.

Multistructured Electrospun Nanofibers for Air Filtration: A Review