Preparation method of long afterglow fluorescent fibers emitting red light

Abstract

The invention relates to a preparation method of long afterglow fluorescent fibers emitting red light. The method is characterized by comprising the following steps: (1) mixing a titanate coupling agent, anhydrous alcohol, a light conversion agent of a xanthene structure and a fluorescent material, conducting heating and reaction in the high-speed dispersion state, filtering after reacting, fully washing with the anhydrous alcohol, drying and crushing to obtain a light conversion agent / fluorescent material composite; (2) drying PET powder in a vacuum oven to be premixed with the light conversion agent / fluorescent material composite to obtain a fluorescence fiber masterbatch material; (3) after the fluorescence fiber masterbatch material is dried, using a double-screw extruder to carry out melting and granulating to manufacture spinning masterbatches; (4) uniformly mixing PET masterbatches with the spinning masterbatches, carrying out melt spinning after drying, extruding, drafting and winding to prepare the long afterglow fluorescent fibers which can emit red light. According to the invention, the bonding force with PET macromolecules as fiber base materials is increased and the fiber material which has good dispersion and long afterglow fluorescence and emits the red light is obtained.

Description

technical field [0001] The invention relates to a preparation method of a red-emitting long-lasting fluorescent fiber, which belongs to the technical field of functional textile materials. Background technique [0002] With the development of science and technology, single-performance fiber raw materials can no longer meet people's growing demand for functional textiles, and at the same time, the safety and environmental protection of the fiber itself has attracted more and more attention. As a major textile province, Jiangsu Province is leading the development of the national textile industry. In recent years, with the rapid development of our province's industry, the variety of long-lasting materials and the improvement of performance, as well as the maturity of spinning technology and equipment, rare earth luminous fiber came into being. and achieved certain research results. Luminous fiber is a new type of functional fiber material with high technological content, which...

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Problems solved by technology

[0003] The development of luminous fiber can be traced back to 1998. A German company first developed a fiber that emits green light in the absence of light, using zinc sulfide as the luminescent material, and adding luminescent materials, spinning aids, etc. The fiber prepared by this method has high initial brightness but the afterglow time is too short, and it is easy to age when placed in the air, so the fiber has not been widely used

In 2002, in order to make up for the shortage, a company in the United States used zinc sulfide added with radioactive isotope 147 as a luminescent material to make a luminous fiber. The environment has produced corresponding hazards, so the luminous fiber has not been well researched and applied.

At present, the luminescent materials for luminous fibers include Sr 2 MgSi 2 o 7 :Eu 2+ , Dy 3+ , SrAl 2 o 4 :Eu 2+ , Dy 3+ Two kinds, mainly emitting blue light and green light, while the role of the matrix lattice structure of the red luminescent material and the low-energy transition of the outer electrons of the rare earth ion lead to poor luminescence performance, which cannot meet the performance requirements for the preparation of luminous fibers

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