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为了研究聚丙烯腈/二醋酸(PAN/CA)复合纳米纤维膜的截滤性能,以N,N-二甲基乙酰胺(DMAC)为溶剂,将PAN/CA以质量比分别为100/0、90/10、80/20共混配制成质量分数为10%的溶液,以静电纺丝技术,制备PAN/CA复合纳米纤维膜。借助扫描电镜(SEM)及相关测试软件,测出复合纳米纤维的平均直径分布在300~400nm之间,可纺性较好;傅里叶红外(FT-IR)测试结果显示:PAN与CA在晶区是不相容的,无定区有部分分子级相容,但相容程度不高;复合纳米纤维膜的力学性能和滤菌性能测试表明:存在一个较好的PAN/CA质量比,当PAN/CA质量比为90/10时,纳米纤维膜的强伸性较好;在实验范围内,纳米纤维膜对金黄色葡萄球菌的截滤效率高达97%。
In order to study the filtration performance of polyacrylonitrile / diacetic acid (PAN / CA) composite nanofibrous membranes, the PAN / CA mass ratio of N, N-dimethylacetamide (DMAC) , 90/10, 80/20 blend to prepare a solution with a mass fraction of 10%, and electrospinning the PAN / CA composite nanofiber membrane. The average diameter of the composite nanofibers was found to be between 300 and 400 nm with scanning electron microscopy (SEM) and related testing software. The results of Fourier transform infrared (FT-IR) The crystalline zone is incompatible, and the amorphous zone is partially compatible with some molecules, but the compatibility is not high. The mechanical properties and bacterial filtration performance of the composite nanofibrous membrane show that there is a better PAN / CA ratio, When the mass ratio of PAN / CA was 90/10, the tensile strength of the nanofiber membranes was better. The filtration efficiency of nanofiber membranes against Staphylococcus aureus was as high as 97% within the experimental range.