To expand the application of nano-fiber membrane with different raw materials in air filtration field,PVDF/PU blended nano-fiber membrane was prepared by electrospinning according to property of PVDF and PU.The effect of PVDF/PU blended ratio on the fiber membrane morphology,chemical structure,mechanical property and air filtration were studied.The results showed that mechanical property and hydrophily of the PVDF/PU blended nano-fiber membrane could be increased obviously through adding PU.When the blended ratio of PVDF/PU was 8∶2,morphology and air filtration property of the nano-fiber membrane were the best,the filtration efficiency was 91.3%,and the resistance was only 51 Pa,which can meet the requirement of high efficiency and low resistance of air filtration material.
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