Preparation and study on the structure and properties of rare-earth luminescent fiber

In order to further explain the luminous properties of rare-earth luminescent fiber and promote various-product development of the fiber, in this research, rare-earth luminescent fiber was prepared by using rare-earth strontium aluminate as the rare-earth luminescent material, fiber-forming polymer PET as the matrix. The microstructure, composition and properties of rare-earth luminescent fiber were studied systematically based on tests and analysis with luminescent fiber, rare-earth luminescent materials and polyester fiber in detail. The results showed that the crystal structure of SrAl ₂ O ₄ : Eu ²⁺ , Dy ³⁺ distributed in fiber was not destroyed by the polymer matrix and that the complex manufacturing process to ensure luminous properties of fiber performed well. Meanwhile, the structure and properties of luminescent fiber with no distinct changes were similar with that of the polyester fiber. The breaking tenacity and elongation of luminescent fiber in the wet state decreased respectively compared to the dry, and the breaking tenacity of polyester fiber was higher than luminescent fiber. The endothermic melting peak and glass transition temperature of luminescent fiber were slightly higher than that of polyester fiber. Decay curves of samples were successfully fitted by the sum of three exponential components with different decay times. Characteristic decay tended to be longer in luminescent fiber, while the initial luminance intensity of SrAl ₂ O ₄ : Eu ²⁺ , Dy ³⁺ was higher than that of luminescent fiber.