Abstract: In order to improve the spinning rate and fiber strength of electrospinning, AgNWs-PVDF nanofiber membranes were prepared by coaxial electrospinning needle combined with high-speed airflow assisted electrospinning.The microstructure, filtration, strength and antibacterial properties of nanofibers were studied by SEM, permeability, filtration, mechanical properties, antibacterial properties, porosity and pore size distribution.The results showed that after adding AgNWs, the average diameter of 0.5% AgNWs-PVDF air-jet-electrospinning nanofiber membranes was the lowest, up to 73.85 nm, while the average pore size and breaking elongation of the nanofiber membranes decreased. The 1% AgNWs-PVDF air-jet-electrospinning membrane had the strongest breaking strength, reaching 6.52 MPa. With the increase of the AgNWs content, the hydrophilicity of the air-jet-electrospinning membrane increased, the air permeability decreased, and the filtration efficiency increased.The 2% 
AgNWs-PVDF air-jet-electrospinning fiber membrane had the best antibacterial effect, and the diameters of the inhibition zone against Escherichia coli and Staphylococcus aureus were 26.23 mm and 26.89 mm, respectively.

Key words: AgNWs, PVDF, electrospinning, air-jet, nanofiber

摘要： 为提高静电纺的纺丝速率及纤维强度，通过同轴静电纺丝针头结合高速气流辅助静电纺，制备AgNWs-PVDF纳米纤维膜。并利用SEM、透气性、过滤性、力学性能、抗菌性能、孔隙率及孔径分布等测试研究了纳米纤维微观形貌结构、过滤、强力和抗菌性能。结果表明：加入AgNWs后，0.5%AgNWs-PVDF气喷-电纺纳米纤维膜的平均直径最低，可达73.85 nm，同时纤维膜的平均孔径、断裂伸长减小，1%AgNWs-PVDF气喷-电纺膜断裂强度最强，达6.52 MPa。随着AgNWs含量的增加气喷-电纺膜的亲水性提高、透气性减小、过滤效率增大，2%AgNWs-PVDF气喷-电纺纤维膜抑菌效果最好,对大肠杆菌和金黄色葡萄球菌的抑菌圈直径分别为26.23、26.89 mm。

关键词: AgNWs, PVDF, 静电纺丝, 气喷, 纳米纤维