铽配合物掺杂聚丙烯腈纳米纤维的荧光辐射特性

Fluorescence radiation of terbium-complex doped polyacrylonitrile nanofibers

通过静电纺丝技术获得直径约为200 nm,均匀且取向随机的Tb(BA)3Phen掺杂聚丙烯腈(PAN)纳米纤维。采用扫描电子显微镜、傅里叶红外光谱仪、紫外/可见/近红外分光光度计、差式扫描量热仪和荧光光谱仪对样品的形貌及性能进行了分析。荧光复合材料的激发光谱表明,有效激发波长范围为220~350 nm。在紫外激发下,Tb(BA)3Phen/PAN复合材料呈现出强烈的绿色荧光发射。随着Tb(BA)3Phen掺杂量的增加,荧光强度明显增强。同时,静电纺纤维的发光强度可达体材料的5倍以上,进一步证实了静电纺纤维化对荧光体光辐射效果的增强作用。强烈的荧光发射和良好柔韧性能表明铽配合物掺杂PAN纤维在防伪识别、智能服装、光电显示等方面拥有特殊的优势和潜能。

Tb(BA)3Phen doped polyacrylonitrile(PAN)nanofibers with an uniform diameter of about 200 nm and random orientation were obtained by electrospinning method.The morphology and performance of samples were analyzed by scanning electron microscopy,fourier infrared spectrometer,UV/Vis/NIR spectrophotometer,differential scanning calorimeter and fluorescence spectrometer.The excitation spectra of the fluorescent composites showed that the effective range of excitation wavelength is 220-350 nm.Under ultraviolet radiation,Tb(BA)3Phen/PAN exhibited intense green fluorescence emission.With the increase of Tb(BA)3Phen doping content,the fluorescence intensity increased significantly.Moreover,the luminous intensity of electrospinning fibers is up to 5 times that of bulks,which further confirms the enhancement effect of electrospinning fibrosis on fluorescence radiation.Intense fluorescence emission and good flexibility indicated that the terbium-complex doped PAN fibers possessed special strengths and potential in anti-counterfeiting identification,intelligent clothing and photoelectric display field.