Acoustic “re-charging” of nanofiber air filters
Abstract
filtration efficiency to ∼75% (solid) and ∼74% (oil), with a pressure drop of 96 Pa. Subsequent acoustic stimulation (100 Hz, 110 dB, 10 min) restored the efficiency to 99.99% for solid and 92.90% for oily particles, while lowering the pressure drop to 45 Pa, performance that matches that of the pristine, as-spun membranes. This recovery stems from sound-induced fiber vibration, which activates a synergistic piezoelectric-triboelectric mechanism within the microphase-separated composite, replenishing surface charge and expanding the pore structure. The process is repeatable over 30 cycles without decay and also enhances back-pulse cleaning. By introducing acoustic energy as a distinct, non-contact regeneration regime, this work provides a scalable pathway toward energy-efficient, durable, and high-performance air filtration systems.
Fields of Study & Subjects
Aerosol Filtration and Electrostatic Precipitation
Acoustic Wave Phenomena Research
Electrospun Nanofibers in Biomedical Applications
Publication details
- Journal / source
- Materials Horizons
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 13
- Issue
- 10
- Pages
- 4992–5003
- Publication date
- 1 January 2026
- Language
- EN