Self-Supporting Three-Dimensional Electrospun Nanofibrous Membrane for Highly Efficient Air Filtration

Abstract

High-performance air filtration was the key to health protection from biological and ultrafine dust pollution. A self-supporting, three-dimensional (3D) nanofibrous membrane with curled pattern was electrospun for the filtration, of which the micro-fluffy structure displayed high-filtration efficiency and low-pressure drop. The flow field in the 3D filtration membrane was simulated to optimize the process parameters to increase the filtration performance. The qualification factor increased from 0.0274 Pa−1 to 0.0309 Pa−1 by 12.77% after the optimization of the electrospinning parameters. The best filtration efficiency and pressure drop were 93.6% and 89.0 Pa, separately. This work provides a new strategy to fabricate 3D structures through the construction of fiber morphology and promotes further improvement of air filtration performance of fibrous filters.

High-performance multifunctional electrospun fibrous air filter for personal protection: A review

“…Ultimately, the QF of the prepared curled PVDF nanofibers ( Fig. 7 (h)) was 12.77 % higher (0.0309 Pa −1 ) than that of straight one (0.0274 Pa −1 ) [138] . The preparation process of crimped fiber is relatively simple.…”

“…The velocity distributions of the airflow inside: (f) spiral fibers and (g) straight fibers. (h) The SEM image of spiral PVDF fibers [138] . …”

Multistage-Split Ultrafine Fluffy Nanofibrous Membrane for High-Efficiency Antibacterial Air Filtration

“…Electrospun nanofibrous membranes are widely used in air filtration owing to their ultrafine diameter, high specific surface area and porosity, and electrostatic adsorption capacity. − Under an electric field, a polymer solution is stretched into fine jets and quickly solidified to form nanofibers. Because of the slip effect (i.e., the fluid is in slip flow regime and the resistance decreases or disappears), when the fiber diameter is less than 13 nm, the air streamline is completely unaffected, which facilitates the development of high-efficiency, low-pressure air filters .…”

Polystyrene/Fluorinated Polyurethane Electrospinning Nanofiber Membranes Incorporated with Graphene Oxide–Halamine as Mask Filter Materials for Reusable Antibacterial Applications

“…Electrospinning nanofibrous membranes are an alternative candidate for the preparation of high-performance air filters owing to their controllable morphology, good internal connectivity, and high specific surface area. − Research has shown that reducing the diameter of the nanofibers or enhancing the nanofibers’ interfacial properties can effectively improve the filtration efficiency of the materials . Zhang et al created ultrafine nanofiber network air filters using a unique electrospraying technique, and the filters exhibited excellent filtration performance (removal efficiency >99.995%, <0.09% atmospheric pressure).…”