Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 655, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.130302
Keywords
Electrostatic spinning; Well -ordered structure; Nanofiber membranes; Air filtration
Categories
Funding
- Key Research Project of China
- [20SWAQX06]
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This study utilized the properties of polyacrylonitrile to prepare well-ordered nanofiber membranes, which exhibit excellent air filtration efficiency and low resistance.
Disordered pore structures present in traditional fiber filtration materials often mean they are incapable of simultaneously achieving high filtration efficiencies and low air resistance. In this study, the excellent spinn-ability, hydrophobicity, and stability properties of polyacrylonitrile (PAN) have been exploited to prepare electrospun nanofiber membranes containing well-ordered fibers with diameters ranging from 240 to 404 nm and pore sizes ranging from 1.91 to 6.45 mu m. These nanofiber membranes exhibit excellent air filtration effi-ciencies ranging from 94.83 % to 99.60 % for aerosol particles with diameters of around 300 nm, which occurs with a corresponding pressure drop from 33 to 98 Pa. Three-dimensional (3D) models of disordered nanofiber membranes, standard-ordered nanofiber membranes, and cross-ordered nanofiber membranes were constructed, which confirm that the ordered structure can greatly reduce the pressure drop of the fiber membranes whilst maintaining filtration efficiency. The new well-ordered membranes exhibit significantly higher filtration effi-ciencies and lower air resistance than traditional fiber air membranes that contain a more disordered structure, meaning they should be well-suited for air-filtration applications.
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