负载纳米银颗粒的纳米纤维膜的制备与表征

Preparation and characteristic of polymer nano bers film containing silver nanoparticles spun by electrospinning

采用一步还原法和螯合法制备Ag/PAN纳米纤维膜。采用SEM,UV,XRD,FT-IR傅里叶变换红外光谱仪对该纤维形貌,银粒子晶型、尺寸、官能团进行表征。得知两种方法都可制备出嵌有(或附着)纳米银颗粒的PAN纳米纤维膜,银粒子的粒径可以达10nm,且经过比较,Ag/PAN膜经过还原处理后,表面Ag粒子的含量更高,分布更均匀。

Two methods were mentioned. One was one-step reduction method which N, N-dimethylformamide （DMF）was used as a solvent for PAN as well as a reducing agent for the Ag ^＋ ions. Polyacrylonitrile nanofiber film （PANNF） containing Ag nanopartieles was prepared by electrostatic spinning. Part of the PANNF was used for the further reduc tion treatment in N2 H5 OH aqueous solution. The another was called chelating route. In this route,Ag nanoparticles with uniform size were well dispersed on the surface of the PAN nano？ her. The Ag/PAN nanocomposite film was characterized by scanning electron microscopy （SEM）, ultraviolet-visible （UV-vis） spectroscopy, X-Ray Diffractometer （XRD） and Fou rier transform infrared spectroscopy （FTIR）. XRD indicated that PANNF contained Ag inside or on the surface. UV spec trum showed that the diameter of Ag nanoparticles can be 10nm. FTIRrevealed the changes of functional groups. Compared with Ag/PAN film without further reduction,it showed that the further reduction can improve the sliver content on the fi ber and made the Ag nanoparticles more uniformly dispersed in the film.