高效低阻聚丙烯腈/石墨烯纳米纤维膜的制备及其抗菌性能

为了提高聚丙烯腈（PNA）基材料的过滤性能，采用静电纺丝的方法制备了含有不同质量分数石墨烯的PNA /石墨烯纳米纤维复合材料。并对复合材料的过滤效果及抗菌性能进行研究，探讨气流量及孔径分布对过滤效果的影响。研究结果表明：当氧化石墨烯（GO）的质量分数为0.3%时，纺制的纤维平均直径为103nm，复合膜的过滤性能最好；纳米复合材料的过滤效率随气流量的增加而减小，孔径尺寸分布在1.3 ~ 1.7μｍ 之间时最有利于过滤效率的提高；当GO和还原性氧化石墨烯（rGO）质量分数均为0.3%时，PAN /GO 纳米复合材料比PAN/rGO 纳米复合材料的过滤性能好，PAN / GO 和PAN/rGO 纳米复合材料对大肠杆菌的抑菌率分别为32.4%和40.5%，对金黄色葡萄球菌的抑菌率分别为45.8%和56.7%。

Preparation and antibacterial property of high-efficiency low-resistance polyacrylonitrile/graphene nanofiber membrane for gas filtration

In view of polyacrylonitrile (PAV) as filter material with the influence on air filtration performance factors, the electrospun graphene/PAN composite membranes differentcontents ofgraphenewere prepared. Filtration efficiency and antibacterial property of menbranes were tested, and the injluences of air flowrate and pore size distributionmembranes on filtration efficiency were studied. Results showed that when the content of graphite oxide(GO) is0.3%, the average diameter ofnanofibers was 103 nm and thefiltration efficiency of thecomposite membrane reaches to maximum; thefiltration efficiency of the composite membrane decreased with the increase of flow rate, andpore size between 1.3~1.7μm was best forimprovement of the membrane filtration efficiency; and when the contents ofGO and reductive graphite oxide (rGO) were 0.3%, the filtration efficiency of the GO/PAN composite membrane was better than that of therGO/PAN composite membrane, and though the antibacterial property was the opposite，namely the antibacterial experiment results were PAN/GO and PAN/rGO nanocomposite bacteriostatic rate of E. coli were 32.4% and 40.5%, respectively, the inhibition rate of Staphylococcus aureus were 45.8% and 56.7% respectively.