静电纺丝是一种有效制备超细纤维的重要方法. 以钛酸丁酯作为TiO2前驱体实现了聚碳酸酯(PC)/TiO2的制备, 采用TEM、SEM、红外光谱、X射线衍射等方法进行理化性能表征, 并测试了材料的抗菌性能. 结果表明: 当PC与钛酸丁酯质量比为9:1时电纺纤维尺寸较均匀, 珠状物最少; 7:3时纤维膜对大肠杆菌的抗菌率达到87%左右, 以期用于过滤膜、防护服及医疗纺织材料等领域.
Functional ultrafine fibers of polycarbonate (PC)/TiO2 were prepared by electrospinning of PC solutions mixed with butyl titanate for possible anti-bacterial applications. Three different mixture ratios, i.e. 9:1, 8:2, and 7:3 by mass between PC and butyl titanate were applied. These fibers were then characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Furthermore, anti-bacterial performance of the nonwoven fiber mats on escherichia coli was also measured. Experimental results show that when the ratio of PC and butyl titanate is 9:1, the resulting fibers are most uniform with least beads on the fiber surfaces. When this ratio is increased to 7:3, however, as high as 87% of the escherichia coli bacteria are killed. The present work demonstrates that an attachment of titania into PC ultrafine fibers leads to a significant improvement in their anti-bacterial ability.
参考文献
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