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

Area of Science:

• Materials Science
• Environmental Engineering
• Nanotechnology

Background:

• High-performance air filtration is crucial for protecting human health from biological and ultrafine dust pollution.
• Existing fibrous filters often face trade-offs between filtration efficiency and pressure drop.

Purpose of the Study:

• To develop a self-supporting, three-dimensional (3D) nanofibrous membrane for high-performance air filtration.
• To optimize the electrospinning process for enhanced filtration efficiency and reduced pressure drop.

Main Methods:

• Fabrication of a 3D nanofibrous membrane with a curled pattern using electrospinning.
• Simulation of the flow field within the 3D filtration membrane to optimize process parameters.
• Evaluation of filtration efficiency and pressure drop.

Main Results:

• The micro-fluffy structure of the 3D membrane demonstrated high filtration efficiency and low pressure drop.
• Optimization of electrospinning parameters increased the qualification factor by 12.77% (from 0.0274 Pa^-1 to 0.0309 Pa^-1).
• The optimized membrane achieved a filtration efficiency of 93.6% with a pressure drop of 89.0 Pa.

Conclusions:

• A new strategy for fabricating 3D structures with controlled fiber morphology was established.
• The developed 3D nanofibrous membrane offers a promising solution for improved air filtration performance.
• This work contributes to the advancement of fibrous filter technology for better air quality and health protection.