Fig. 3: Air purification performance of nanofibrillated CFNs.
From: Nanofibrillated collagen fiber networks for enhanced air purification
A Schematic illustration of the experimental setup for air purification, and the filtration mechanisms of Nano-CFN. B Comparison of HCHO removal efficiencies among pristine CFN, Nano-CFN and three layers of standard H13 filters (3 × H13). Data are presented as mean values ± SD (n = 3). C Filtration efficiencies of CFN, Nano-CFN, and a three-layer H13 filter for PM of varying sizes (PM10: 10 μm, PM2.5: 2.5 μm, PM0.3: 0.3 μm). Data are presented as mean values ± SD (n = 3). D SEM image of Nano-CFN after PM removal. Experiments were repeated three times with similar results. E Pore size distribution profiles for CFN and Nano-CFN. F Pressure drops versus air face velocity for CFN, Nano-CFN, and 3 × H13 filters. G Comparison of quality factor (QF) and dust holding capacity (DHC) among CFN, Nano-CFN, and H13 filters. Data are presented as mean values ± SD (n = 3); the error bars indicate measurement variations. H Dynamic HCHO removal efficiency curves over a 5-cycle test using a commercial air purifier equipped with a Nano-CFN filter. I Dynamic PM2.5 removal efficiency under identical conditions. J Comparative analysis of Nano-CFN’s performance against reported protein-based air filters and other common filter materials.
