Preparation of electrospun luminescent polyimide/europium nanofibers by simultaneous in situ sol-gel and imidization processes

Si Cheng, Xiaofei Li, Sibai Xie, Yun Chen, Li Juan Fan

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17 Citations (Scopus)

Abstract

Luminescent polyimide (PI)/europium nanofibers have been successfully prepared by electrospinning combined with an in situ sol-gel technique. The possible reaction mechanism of the simultaneous imidization of polyamide acid and gelation of europium phase was analyzed by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The results showed that chemical coupling and noncovalent interaction existed between the polymer and the europium which formed during the preparative process. Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electronic spectroscopy (SEM) studies also indicated the successful incorporation of europium into PI matrix and various morphologies could be achieved by controlling the calcination temperature and the europium content. Nanofibers with necklace-like structures were obtained after calcination under high temperatures. These PI/europium nanofibers were further demonstrated to have strong fluorescence emission. The intensity ratio for the PI/europium nanofibers, labeled as (5D07F2)/(5D07F1), which is well known as the asymmetry parameter, was lower than that in pure Eu2O3 powder, indicating that there were highly symmetric coordination spheres around europium in the nanofibers.

Original languageEnglish
Pages (from-to)92-99
Number of pages8
JournalJournal of Colloid And Interface Science
Volume356
Issue number1
DOIs
Publication statusPublished - 2011 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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