Preparation and property analysis on PAN/MgO/Ag composite nanofibrous filtration membrane.

In order to improve the property of polyacrylonitrile (PAN) nanofibrous membrane, MgO nanoparticles and Ag nanoparticles (MgONPs and AgNPs) were added into the polyacrylonitrile (PAN) solution. PAN/MgO/Ag composite nanofibrous filtration membranes with different mass fractions of MgO and Ag nanoparticles were prepared through electrospinning method. Their microstructure, crystalline structure, air permeability, moisture permeability and filtration property were tested by scanning electron microscope, X-ray diffractometer, infrared spectrometer, ultraviolet translucency analyzer and filtration property tester. Test results showed that the fiber diameter of pure PAN nanofiber was 222.9 nm while the diameter of PAN/MgO/Ag composite nanofibers were 151.5 nm~258.6 nm. Compared with pure PAN nanofibrous membrane, composite PAN/MgO/Ag nanofibrous membranes possessed excellent filter performance and ultraviolet protective property. Their UV protective factor were 38.73~55.37. The filtration efficiency were 95.36%~97.59% while the pressure drop were 46.06 Pa~58.31 Pa. When the mass fraction of MgONPs and AgNPs were both 0.75%, PAN/MgO/Ag composite nanofibrous membrane had the maximum quality factor of 0.071 4 Pa^-1 and the filtration performance was the best, which belonged to the fiber filtration material with higher efficiency and lower resistance and UV protection property. [ABSTRACT FROM AUTHOR]