Abstract: DMF was used as solvent to dissolve PAN powder and the resulting solution was employed to prepare PAN nanofibers with diameter of about 400 nm by using high-pressure electrospinning technology. And after needle-punching process, the “nanofiber-embedded” composite filter material was produced. Test results indicated that this novel composite filter has excellent filtering property, which has a huge potential to filter the ultramicron under 1～2 μm.

Key words: nanofiber; embedded; electrospinning; filtration efficiency; pressure drop