摘要
以硝酸盐和柠檬酸为原料,采用有机凝胶-热分解法制备了铜铁氧体(CuFe2O4)中空纤维.通过采用傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和振动样品磁强计等测试技术,对纤维前躯体的结构、热处理产物的物相、形貌以及磁性能进行了表征.800℃热处理2 h后得到纯相CuFe2O4纤维,且纤维平均直径在1μm左右,具有良好的中空结构和长径比,饱和磁化强度和剩磁分别为42.5 A.m2.kg-1和23.0 A.m2.kg-1.以制备的CuFe2O4纤维为载体,利用浸渍法吸附银处理,再经过500℃热处理后,得到载银铜铁氧体(Ag/CuFe2O4)纤维.抗菌试验表明:Ag/CuFe2O4纤维具有良好的抗菌效果,8μg.mL-1剂量的纤维样品20 h能抑制浓度为5×105CFU.mL-1的大肠杆菌的生长.
Copper fen＇ire（CuFe2Q） magnetic hollow fibers were prepared by organic gel-thermal decom- position method with nitrate and citrate acid as raw material. The structure, chemical composition, morphology as well as magnetic property of the precursor fibers and products derived from thermal decomposition of the precursor fibers at different temperature were determined by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. The results show that with the heat-treatment for 2 h at 800 ℃, nanofibers in hollow structure are successfully prepared with good ratio of length and diameter, and with average diameter of 1 μm. The saturation magnetization and residual magnetization are 42.5 and 23.0 A · m^2 · kg^-1, respectively. Ag-loading CuFe204 （Ag/CuFe2O4） nanofibers were fabricated with dip method. The antibacterial experiment shows that the Ag/CuFe2O4 fibers exhibit excellent antimicrobial activity against E. coli. The nanofiber content of 8 μg ·mL^-1 can completely inhibit 5 x 10^5 CFU · mL^-1 E. coli.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期116-120,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(31101388)
江苏高校优势学科建设工程项目
