纳米Ag-聚乙烯醇缩丁醛静电纺丝复合纳米纤维的制备及性能

摘要

采用静电纺丝技术制备纳米Ag-聚乙烯醇缩丁醛(PVB)复合纳米纤维,获得一类过滤性能和抗菌性能优异的空气过滤材料.采用TEM分析纳米Ag的形貌,采用SEM、FTIR和XRD等表征手段研究纳米Ag-PVB复合纳米纤维的微观形貌、化学结构以及结晶行为,并对其空气过滤性能、透气性能和抗菌性能进行了研究.结果表明:以乙醇为溶剂,当PVB含量为10wt％、纳米Ag含量为0.25wt％时,得到的纤维尺寸均一,平均直径为542.14 nm.性能测试结果表明,纺丝最佳时间为10 min,纳米Ag-PVB复合纳米纤维对PM2.5过滤效率为99.99％,过滤阻力为16 Pa,透气率为155.0 mm/s,并且对大肠杆菌表现出优异的抗菌性能,其抑菌率为95.52％.%The nano Ag-polyvinyl butyral (PVB) composite nanofibers were prepared by electrospinning method,which aimed to fabricate antibacterial and efficient air filtration material.The morphology of nano Ag was characterized by TEM.The microstructure,chemical structure and crystal structure of the as-prepared nano Ag-PVB composite nanofibers were confirmed by SEM,FTIR and XRD.Moreover,the filtration efficiency,air permeability and antibacterial performance of the composite nanofibers were further studied.The results indicate that the suitable component for preparing composite nanofibers is 10wt％ PVB and 0.25wt％ nano Ag in ethanol solvent.Under the operating condition,the nano Ag-PVB composite nanofibers exhibit uniform structure with fiber diameter of 542.14 nm.The air filtration performance test reveals that the optimized electrospinning time is 10 min.Moreover,the nano Ag-PVB composite nanofibers display excellent PM2.5 filtration efficiency of 99.99 ％,low pressure drop of 16 Pa and appropriate air permeability of 155.0 mm/s.Further antibacterial test demonstrates that the nano AgPVB composite nanofibers exhibit good antibacterial performance for E.coli,and the antibacterial rate is 95.52％.