Abstract
Electrospinning nanofiber membrane has many advantages, such as high specific surface area, small pore size, high porosity, and good fibre uniformity, which makes it show excellent application potential in air filtration and personal protection. This study used an electrospinning method to create a PVDF/SiO2/Ag composite nanofiber membrane with superhydrophobic and antibacterial properties. It was deposited on the surface of PET fibre to create an air filter material with a sandwich structure, and its surface morphology, antibacterial properties, surface wettability, and filtration efficiency were studied. The results demonstrated that the adding of nanosilver significantly improved the antibacterial performance of the composite nanofiber membrane. In addition, the hydrophobic performance of the nanofiber membrane was significantly improved as the concentration of hydrophobic nano-SiO2 was increased. As a result, the PVDF/SiO2/Ag composite nanofiber membrane had a filtration efficiency of 99.94% for 0.3 μm particulate matter and a drag pressure drop of 112.3 Pa. Furthermore, the filtration efficiency of air microorganisms was greater than 99.99%, indicating a promising application in air filtration.
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