Study On The Fabrication Of PMMA/Eu³⁺ Composite Nanoifbers And Its Optical Properties

Luminescence rare（RE） ions are of fundamental and technical interest due to theircharacteristic luminescent properties, such as potential high internal quantum efficiency, longlifetime, and extremely sharp emission bands. Rare earth luminescence materials are widelyused in the fields of display, lighting and detection. Electrospinning technique is the mostsimple and versatile method to obtain of continuous fibers with diameters down to a fewnanometers. The method can be applied to synthetic one-dimensional（1D） organicpolymer-inorganic composite fiber.The Poly（methyl methacrylate）（PMMA）/Eu³⁺ions composites nanofibers andnanoribbons were obtained by electrospinning the poly（methyl methacrylate）-europiumnitrates precursor solution, which was prepared with PMMA, europium nitrates and templateDMF as raw material via a sol-gel process. The influence of concentration ratio of PMMA toeuropium nitrates, spinning voltage on the morphology of the products was systematic studied.The study showed that the morphology of the PMMA/Eu³⁺ions composites could be changedfrom to ribbon structure by adjusting the concentration of Eu³⁺ions in the electrospunprecursor solution.The effect of different factors on the structure and luminescent properties of thecomposition were investigated by Fourier transform Infrared spectroscopy（FT-IR）,Differential Thermal Analysis（DTA）, Photoluminescence（PL） spectra. FT-IR and DTAanalysis manifested the coordination between the Eu³⁺and PMMA molecules. PL spectraanalysis indicated that the5D0-7FJ（J=0,1,2,3,4） emission appeared in the PL spectra of thePMMA/Eu³⁺ions composites, whereas the5D0-7F0emission was completely absent in the PLspectra of Eu（NO3）3powder due to the different local environments surrounding Eu³⁺ion. Itwas interesting to note that intensity ratios of the electric-dipole and magnetic-dipoletransition for the PMMA/Eu³⁺ions composites could be enhanced significantly by increasingelectrospinning voltage.