Fabrication of the PLA/Sr2MgSi2O7:Eu2+, Dy3+ long-persistent luminescence composite fibers by electrospinning

• Long-persistent luminescent nanoparticles of Sr1.97MgSi2O7:0.01Eu2+, 0.02Dy3+ were synthesized by sol–gel.
• One-dimensional PLA/Sr2MgSi2O7:Eu2+, Dy3+ composite fibers (diameter 1.5 μm) were fabricated by electrospinning.
• The composite fibers have properties of fluorescence and long-persistent luminescence.

A novel one-dimensional PLA/Sr2MgSi2O7:Eu2+, Dy3+ composite fibers composed of long-persistent luminescence nanoparticles of Sr2MgSi2O7:Eu2+, Dy3+ and ploy lactic acid were successfully synthesized by means of electrospinning. Phase, morphology and luminescence properties were examined. The composite fibers contain 12.5 wt% of nanoparticles. It was found that the fibers (diameter 1.5 μm) with nanoparticles (size 200 nm) have an emission band from 410 nm to 590 nm and a major emission peak at 468 nm. It’s strongest excitation peak was at 360 nm. Similarly, it’s phosphorescent emission spectra have an emission band from 410 nm to 590 nm and a major emission peak at 468 nm. Decay curves of the composite fiber have a similar tendency with Sr2MgSi2O7:Eu2+, Dy3+ pure powder, but with lower intensity. The fibers have the properties of both long-persistent luminescence nanoparticles and PLA of polymer fibers, combining phosphorescence, fluorescence, plasticity, elasticity, self-degradation altogether. As these characters of above, the fibers has applications possibility in textiles, optical detectors, and vivo imaging.

Figure optionsDownload high-quality image (66 K)Download as PowerPoint slide