Abstract:

Silane coupling agent (KH-570) was used to modify the rare-earth strontium aluminate luminescent powder, which has good stability in aqueous solution. The  long-afterglow luminescent regenerated cellulose fibers were prepared regenerated cellulose fibers (prepared from novel NaOH/thiourea/urea solvent system) and the treated rare earth strontium aluminate powder as an additive by wet spinning. The luminescent fiber samples were characterized by Fourier transmission infrared spectroscopy, X-ray diffeaction a tensile tester, and a long-afterglow luminescent tester, respectively. The experimental results showed that the coupling agent was coated on the rare-earth strontium aluminate powder by Si—O—AI chemical bonds. After the coupling process, the luminescent fiber has smooth appearance and the diameter was about 60 μm. The structure of rare-earth strontium aluminate and cellulose Ⅱaluminate in the fiber at the same time, which were not affected by each other. Tensile properties increased by 10%. The initial luminescent intensity was 0.82 cd / m².

Key words: rare-earth strontium aluminate, coupling agent, regenerated cellulose fiber, wet spinning