Polycarbonate Nanofiber Filters with Enhanced Efficiency and Antibacterial Performance.

Area of Science:

• Materials Science
• Environmental Engineering
• Nanotechnology

Background:

• Global demand for improved air quality necessitates advanced filtration solutions.
• Existing filters face limitations in efficiency and antibacterial properties.
• Polycarbonate (PC) nanofibers offer a promising base for novel filter development.

Purpose of the Study:

• To create and evaluate silver salt-coated polycarbonate (PC) nanofiber filters.
• To assess the impact of filter structure (beaded vs. non-beaded) and areal weight on performance.
• To investigate the filtration efficiency and antibacterial capabilities of the developed filters.

Main Methods:

• Electrospinning process to create PC nanofibers.
• Dipping-extraction method for silver salt coating application.
• Filtration tests using NaCl particles (50-400 nm) and pressure drop measurements.
• Antibacterial assays against E. coli and coliforms using the filtration membrane method.

Main Results:

• High filtration efficiencies, reaching 100% for thicker filters.
• Minimal air resistance observed in beaded filter structures.
• Effective inhibition of bacterial growth (E. coli, coliforms) on filter surfaces.
• Enhanced durability and extended service life due to antibacterial properties.

Conclusions:

• Silver salt-coated PC nanofiber filters demonstrate superior air filtration and antibacterial performance.
• Beaded structures offer reduced air resistance, improving usability.
• These filters are highly promising for applications requiring protection against harmful microorganisms, including industrial systems and hygienic masks.