Fibrous Structures Produced Using the Solution Blow-Spinning Technique for Advanced Air Filtration Process

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Biodegradable materials are increasingly important for sustainable technologies.
• Efficient air filtration is crucial for public health and environmental quality.
• Traditional filters often lack biodegradability or have high pressure drops.

Purpose of the Study:

• To develop a biodegradable filtration structure using solution blow-spinning (SBS).
• To optimize multi-layer filter design with polylactic acid (PLA) for aerosol particle filtration.
• To investigate the relationship between PLA concentration, fiber diameter, and filtration performance.

Main Methods:

• Utilized the solution blow-spinning (SBS) process to fabricate filter layers from PLA.
• Employed a multi-layer filter design with varying PLA concentrations (6% and 10%).
• Applied numerical modeling with the lattice Boltzmann approach for process optimization.

Main Results:

• Achieved filter structures with nanoscale fibers and controllable layer thicknesses.
• Demonstrated that lower PLA concentration resulted in decreased mean fiber diameter and increased filtration efficiency.
• Produced multi-layer filters with 96% efficiency for particles 0.26-16.60 µm at <160 Pa pressure drop.

Conclusions:

• Solution blow-spinning is a viable, cost-effective method for producing efficient, biodegradable filters.
• PLA concentration is a key parameter for tuning fiber morphology and filtration performance.
• The developed filters represent a significant advancement towards sustainable air filtration solutions.