Electret Nonwoven Structures for High-Efficiency Air Filtration, Produced Using the Blow Spinning Technique.

This study explores the fabrication of electret nonwoven structures for high-efficiency air filtration, utilizing the blow spinning technique. In response to the growing need for effective filtration systems, we aimed to develop biodegradable materials capable of capturing fine particulate matter (PM2.5) without compromising environmental sustainability. Polylactic acid (PLA) was used as the primary polymer, with the addition of SiO and MoS to enhance the fibers' charge retention and filtration performance. The fibers were charged electrostatically to improve particle capture efficiency. The experimental results showed that fibers containing 5% MoS exhibited the highest filtration efficiency, surpassing those with SiO, despite MoS being a semiconductor and SiO a dielectric. Furthermore, the addition of MoS improved the filtration efficiency across a range of particle sizes (0.2-1 µm) while maintaining a manageable pressure drop. These findings suggest that incorporating MoS in electret nonwoven structures can significantly improve filtration performance, making it a promising material for advanced air filtration applications. This study contributes to the development of eco-friendly filtration materials with high performance, essential in reducing exposure to airborne pollutants.