Effect of Surface Energy of Electrospun Fibrous Mat on Dynamic Filtration Performance for Oil Particles

摘要

Oil particle removal,different from the removal of general salt particular matter,has an unusual filtration process in which oil particles will be captured by forming a continuous film on the surface of the filter.Therefore,it is important to investigate the effect of surface property of the filter on the oil particle dynamic filtration process.In this study,three fibrous mats with different surface energies were fabricated from polyacrylonitrile(PAN),polyacrylonitrile/cellulose acetate(PAN/CA),and polyacrylonitrile/polyvinylidene fluoride(PAN/PVDF)solutions by needleless electrospinning.PAN/PVDF fibrous mat presented the lowest surface energy(19.99 mJ/m2),followed by PAN/CA fibrous mat(29.49 mJ/m2)and PAN fibrous mat(40.91 mJ/m2).As the oil particle filtration went on,the PAN/PVDF fibrous mat presented both the fastest filtration efficiency decline(4.72%in 10 min)and the fastest filtration resistance increase(543.41 Pa in 10 min).