基于荧光素的荧光纳米纤维的制备与表征

摘要

The novel fluorescent nanofiber films were synthesized by aminating available electrospun polyacrylonitrile nanofibers with ethylenediamine and then immobilizing fluorescein covalently through a Man-nich reaction. The resulting fluorescent nanofibers have been confirmed by fluorescence spectra, field-emission scanning electron microscopy (FE-SEM) and Fourier transform infrared (FTIR ) spectrum. Results show that the synthesized nanofibers exhibit strong fluorescence, which show fluorescein was immobilized covalently into the electrospun nanofiber films. Further modification of electrospun films with fluorescent molecules presents the possibility of practical sensing applications of the electrospun films.%以电纺聚丙烯腈(PAN)纳米纤维为起始物,经乙二胺改性后,再利用Mannich反应将荧光素共价连接于PAN纳米纤维薄膜表面.用荧光光谱、扫描电镜和红外光谱进行了结构表征.结果表明,利用荧光素对静电纺丝薄膜表面进行修饰,获得了很强的荧光信号,证明了方法的可行性.