Method for preparing rare earth fluorescence micro/nano fibers

Abstract

The invention belongs to the technical field of preparation of rare earth europium organic coordination compound and macromolecular polystyrene composite fibers by electrostatic spinning and relates to a method for preparing rare earth fluorescence micro / nano fibers, which comprises: placing europium oxide in an excessive amount of diluted hydrochloric acid to react the europium oxide with the excessive amount of diluted hydrochloric acid completely, allowing the excessive hydrochloric acid to volatilize to obtain europium chloride, reacting the europium chloride, acetylsalicylic acid and phenanthroline, which are in a mass ratio of 1:2.1:0.78, in ethanol in the presence of triethylamine serving as a complexing agent and catalyst, adjusting the pH value to make the chloride, acetylsalicylic acid and phenanthroline react completely, washing, filtering under vacuum and drying to obtain white powdery rare earth coordination compound; and dissolving the rare earth europium coordination compound and a macromolecular material in solution of tetrahydrofuran or trichloromethane respectively, mixing, and uniformly stirring to obtain solution of precursor, and performing electrostatic spinning to obtain micro / nano fibers having smooth appearance and strip structures. In the invention, the preparation process is simple, and the product has low cost, good fluorescence effect and high performance and can be widely used in fields of electrical, optical and chemical materials and the like.

Description

Technical field: [0001] The invention belongs to the technical field of preparing rare earth europium organic complex and polymer polystyrene composite fibers by electrostatic spinning, and relates to a preparation method of rare earth fluorescent micro-nano fibers. Background technique: [0002] Rare earth elements include scandium, yttrium, and lanthanide in the IIIB group of the periodic table of 17 elements. The inner 4f electrons are shielded by the outer electrons to show unique optical, electrical, magnetic and chemical properties. , Which makes them occupy an important position in element chemistry. As a country with large rare earth resources, deep processing of rare earth materials into new functional materials with high added value has important practical significance. Rare earth luminescence is produced by the jumping of rare earth element 4f electrons between different energy levels. It has strong absorption capacity, high conversion efficiency, and can emit spectru...

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Problems solved by technology

Existing fluorescent fibers generally use fluorescent dyes or luminescent materials to add fibers during the chemical fiber manufacturing process, such as in a kind of anti-counterfeiting paper used in securities, certificates, etc. safety fiber, the fiber is short fiber and the content of luminescent material cannot be too high, and the strength and processing performance are poor; a kind of sheath-core suitable for general weaving equipment described in the specification published by the Chinese invention patent (CN1328177A, application number 00118517.9) Composite ultraviolet fluorescent fiber with round cross-section, but its preparation process is complicated, the conditions are harsh, the overall cost is high, and the development and application are difficult

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