Multi-Component Nanofiber Composite Membrane Enabled High PM_0.3 Removal Efficiency and Oil/Water Separation...

Area of Science:

• Materials Science
• Environmental Engineering
• Nanotechnology

Background:

• Industrial waste streams (gases and oily wastewater) often present high temperatures and corrosive components, posing significant challenges for conventional filtration and separation materials.
• Existing materials struggle to withstand harsh conditions, limiting their effectiveness in critical industrial applications.

Purpose of the Study:

• To develop a versatile Poly(m-phenylene isophthalamide)/polyacrylonitrile/silica (PMIA/PAN/SiO2) nanofiber composite membrane for air filtration and oil/water separation in complex environments.
• To evaluate the membrane's performance under challenging conditions, including high temperatures and corrosive chemical compositions.

Main Methods:

• Fabrication of the PMIA/PAN/SiO2 nanofiber composite membrane using a simple electrospinning technique.
• Systematic investigation of the influence of SiO2 nanoparticles (NPs) on mechanical properties and filtration performance through experiments and simulations.

Main Results:

• The composite membrane achieved a high PM0.3 removal capacity of 99.69% and robust purification of real smoke PM2.5.
• Demonstrated effective oil/water separation performance exceeding 99.6%.
• Exhibited superior high-temperature stability (up to ~250 °C) and excellent chemical resistance.

Conclusions:

• The developed PMIA/PAN/SiO2 nanofiber composite membrane is a high-performance, multi-purpose material suitable for demanding filtration and separation tasks in harsh industrial environments.
• The study provides a facile and effective method for preparing advanced membranes for dust filtration and oily wastewater separation, even under extreme conditions.