静电纺丝技术制备聚丙烯腈/铕-脂肪酸相变和发光双功能复合纳米纤维

摘要

Complexes of Eu-fatty acid were synthesized with fatty acid and 1 , 10-phenanthroline as ligand linked up to rare-earth ion( Eu3+) as functional light-emitting group. Then, ultrafine fibers of polyacrylonitrile ( PAN)/ Eu-fatty acid composite in which Eu-fatty acid acts as a model phase change luminescence material and PAN acts as a supporting material, were prepared via electro-spinning as phase change and luminescence materials. The properties of the novel phase change and luminescence fiber were characterized by scanning electron microscope ( SEM ) , energy dispersive spectrometer ( EDS ) , fluorospectrophotometer ( FL ) , the differential scanning calorimetry( DSC) . FL results suggested that under the excitation of 280 nm ultraviolet, PAN/Eu-MA composite nanofiber emitted the predominant emission peaks at 580, 593 and 614 nm, corresponding to 5 D0-7 F0 , 5 D0-7 F1 , 5 D0-7 F2 transitions of Eu3+, respectively. The composite nanofibers have good phase change properties and excellent luminescent property. With the increasing of Eu3+content and car-bon numbers of fatty acid, the average diameters of PAN/Eu-fatty acid composite fibers increases from 285 nm to 600 nm. This technique can be used to prepare other similar phase change and luminescence bifunctional composite nanofibers.%以不同链长的脂肪酸为配体,1,10-邻菲啰啉为第二配体,通过与发光稀土铕离子进行配位,合成了铕-脂肪酸相变和发光配合物；再采用静电纺丝技术以聚丙烯腈( PAN)为载体基质,铕-脂肪酸为相变和发光材料制备了一种新型的相变和发光纳米纤维。用扫描电镜( SEM)、X射线能量色散谱仪( EDS)、荧光光谱仪( FL)和差示扫描量热仪( DSC)对相变和发光纳米纤维的性能进行分析。研究结果显示,复合纳米纤维的直径在285~600 nm,在280 nm紫外光激发下,复合纳米纤维发射出主峰位于580,593和614 nm的红光,对应Eu3+的5 D0-7 F0,5 D0-7 F1及5 D0-7 F2跃迁。相变和发光纳米纤维具有优异的荧光性能及相变功能,纳米纤维的直径随着铕含量和脂肪酸碳链的增加呈现增大的趋势。