Synthesis method of macromolecular white light phosphor powder containing europium and terbium

Abstract

The invention relates to a synthesis method of macromolecular white light phosphor powder containing europium and terbium. Firstly, a reactive europium complex compound and a reactive terbium complex compound are prepared, and then the polymerization is carried out. The synthesis method mainly comprises the following steps: firstly, an aqueous solution of sodium hydroxide, an ethanol solution of azodiisobutyronitrile, an oil phase solution, an oil-in-water normal microemulsion are prepared; then in a four-mouth flask, an europium-terbium-vinylcarbazole-methylmethacrylate tetra-copolymer is synthesized in a nitrogen atmosphere in a water bath while heating and stirring are carried out under such conditions that the water is cyclically condensed and the pH value is neutral; and the reaction product is de-emulsified with methanol, washed, dried, ground, sieved, purified and dried in vacuum to form tetra-copolymer white powder with the grain size less than or equal to 100 nm. The synthesis method has advanced process and high parameter accuracy and precision, and increases the product purity up to 98.6%. The product emits white light, and the color coordinate X is equal to 0.3538 and the color coordinate Y is equal to 0.3356. The synthesis method is an ideal method for synthesizing the macromolecular white light phosphor powder containing europium and terbium.

Description

Technical field: [0001] The invention relates to a method for synthesizing high-molecular white light fluorescent powder containing europium and terbium, and belongs to the technical field of preparation methods of organic photoluminescent materials rare earth high-molecular fluorescent powder. Background technique: [0002] White light LED is a new type of solid-state lighting electric light source. Its light-emitting principle and structure are different from incandescent lamps and fluorescent lamp vacuum electric light sources. White light LED has the advantages of high light efficiency, energy saving, long life, and no pollution. It has great application value and development. prospect. [0003] White light is a mixture of polychromatic light. According to the principles of luminescence and photometry, it can be mixed with blue light and yellow light, or mixed with red, green, and blue primary color light. Koedam and Opstelten predict: The three kinds of lights can be c...

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Problems solved by technology

[0003] White light is a mixture of polychromatic light. According to the principles of luminescence and photometry, it can be mixed with blue light and yellow light, or mixed with red, green, and blue primary color light. Koedam and Opstelten predict: The three kinds of lights can be combined together to obtain high-efficiency fluorescent lamps, and this technology will be realized in the near future; CN100999662A discloses a preparation method of white LED inorganic phosphors excited by blue light, and CN101007947A discloses an inorganic fluorescent light excited by ultraviolet or near ultraviolet powder and preparation method; there are relevant literature reports for preparing rare earth polymer phosphor powder by solution method, but there is no relevant literature for preparing rare earth polymer phosphor powder by microemulsion method; the product structure and feed ratio prepared by solution method will have There is a large difference and poor controllability. Due to the particularity of the polymerization site, the product structure and feed ratio of microemulsion polymerization are relatively close, and the controllability is strong. The ratio of red, green, and blue lights can be adjusted to obtain white light, but It is difficult to prepare red, green and blue composite white light rare earth polymer fluorescent materials by microemulsion method, and further research and discussion are needed in material selection, preparation process, product characterization and detection

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