PAN/TiO2抗菌复合纳米纤维的制备及性能研究

利用静电纺丝方法制备了聚丙烯腈/二氧化钛(PAN/TiO2)抗菌复合纳米纤维,并测试分析了纳米纤维的微观结构和抗菌性能等。结果发现TiO2的加入有效地减小了PAN/TiO2复合纳米纤维的直径;当TiO2的质量分数是0.5%时,PAN/TiO2纳米纤维膜的拉伸强力最大为71.14 cN。抗菌性能定性测试显示PAN/TiO2复合纳米纤维没有抑菌圈;但抗菌性能定量分析表明,PAN/TiO2复合纳米纤维对金黄色葡萄球菌和大肠杆菌的抑菌率都达到了90%以上,且随着TiO2质量分数的增加,对金黄色葡萄球菌的抑菌率相应提高,但对大肠杆菌的抑菌率先增加后减小,在TiO2质量分数为1.5%时达到最大的99.12%。当TiO2质量分数相同时,PAN/TiO2复合纳米纤维对金黄色葡萄球菌的抑菌率都略高于大肠杆菌。

Preparation and properties of PAN/TiO2 antibacterial composite nanofiber

PAN/TiO2 composite nanofibers with antibacterial performance were prepared by electrospinning technology,and their microstructure and antibacterial properties were also tested and analyzed.It was found that the addition of TiO2 effectively reduced the diameter of PAN/TiO2composite nanofibers.The maximum tensile strength of PAN/TiO2composite nanofibers reached 71.14 cN when the mass fraction of TiO2 was 0.5%.The qualitative test of antibacterial performance showed that no bacteriostatic zones were found for PAN/TiO2 composite nanofibers.However,the quantitative analysis of the antibacterial performance showed that the antibacterial rate of PAN/TiO2 composite nanofibers to Staphylococcus aureus and Escherichia coli exceeded 90%,and the antibacterial rate to Staphylococcus aureus increased with the increase of TiO2 mass fraction.But the antibacterial rate to Escherichia coli increased first and then decreased,and reached the maximum 99.12%when the TiO2 mass fraction is 1.5%.In addition,when TiO2 mass fraction was the same,the antibacterial rate of PAN/TiO2 composite nanofibers to Staphylococcus aureus was slightly higher than that of Escherichia coli.