A facile method to prepare the white persistent luminescent fibers based on Sr2ZnSi2O7Eu2+, Dy3+ and fluorescence pigments

The polyacrylonitrile composite fibers with white persistent luminescence were prepared by adding different concentrations of Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ (SZO) and Rhodamine B fluorescent pigments (FP) into polyacrylonitrile spinning solution. Morphology, phase structure, color properties, photoluminescence properties and afterglow properties were examined. Photoluminescence test indicated that the emission spectrum of Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ phosphors overlapped with the excitation spectrum of fluorescent pigments in the range of 450–550 nm, which was the necessary condition for the energy transfer from the Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ to the Rhodamine B fluorescent pigments (FP). The phosphorescent color of the composite fibers showed that the white luminescent polyacrylonitrile fibers can be gained when weight ratios of SZO/FP ranged from 10:0.2 to 10:0.5. Decay curves suggested that the as weight ratio of SZO/FP was less than 10:0.75, the initial brightness of the composite fibers could not be significantly reduced.