Preparation and performance analysis of rare earth luminous fiber with multiple colors

In order to increase the diversity of photochromic of rare earth luminous fiber and improve its single-color problem, a luminous fiber with both red luminescence characteristics and long-lasting luminescence performance was prepared by using SrAl2O4:Eu2+, Dy3+ and Sr2MgSi2O7:Eu2+, Dy3+ as the common luminescent center, the silane coupling agent as a molecular bridge to bond the light conversion agent to the surface of the luminescent material, the polyacrylonitrile fiber-forming polymer as the matrix and spinning through solution method to prepare a luminous fiber that can emit multiple light colors in the dark state after excitation, and its performance was studied. The results showed that the addition of the red conversion agent did not damage the phase structure of the luminescent material and the fiber-forming polymer. The excitation and emission spectra of the composite luminous fiber moved to long wavelengths, and the spectrum had red-shifted. The afterglow curve indicated that as the amount of light conversion agent increased, the fiber afterglow brightness decreased. In addition, the degree of red shift of the light color of the luminous fiber increased with the increase of the concentration of the red conversion agent. © 2021, Chemical Industry Press Co., Ltd. All right reserved.