Method for preparing multicolor luminescence rare earth-polyvinylpyrrolidone macromolecule composite material

A polyvinylpyrrolidone and composite material technology, which is applied in the directions of luminescent materials, chemical instruments and methods, can solve the problems of easy agglomeration, uneven distribution of rare earth complexes, and phase separation between two phases, and achieves uniform particle size distribution and easy production. Large-size display panel, thin and light effect

Inactive Publication Date: 2009-12-09
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hybrid material prepared by the above method is connected by weak interaction force between the rare earth complex and the inorganic matrix, so there are problems such as uneven distribution of the rare earth complex and easy agglomeration, and phase separation between the two phases.

Method used

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  • Method for preparing multicolor luminescence rare earth-polyvinylpyrrolidone macromolecule composite material
  • Method for preparing multicolor luminescence rare earth-polyvinylpyrrolidone macromolecule composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 2.79g of 2-hydroxynicotinic acid was dissolved in 20ml of anhydrous acetone, added to a three-necked flask and heated to reflux. A solution of 4.95 g of propyl triethoxysilyl isocyanate dissolved in 20 ml of anhydrous acetone was then added dropwise. After the dropwise addition, the temperature of the whole solution was controlled at 60° C., refluxed for 12 h under the protection of nitrogen, then cooled, and the solvent was distilled off under reduced pressure. The resultant was washed three times with 20 ml of cyclohexane to obtain a pale yellow oily liquid. The obtained oily organic bridge molecule system was dissolved in absolute ethanol and set aside. Dissolve 3.45g of polyvinylpyrrolidone in 10ml of N,N-dimethylformamide solution, then add dropwise the ethanol solution dissolving the organic bridge molecule, and add the ethanol solution of terbium nitrate or europium nitrate. The mixture was stirred for 3 hours at a temperature of 20° C., and then tetraethyl ort...

Embodiment 2

[0035] 2.44g of m-hydroxybenzoic acid was dissolved in 20ml of anhydrous ether, added to a three-necked flask and heated to reflux. Then, a solution of 4.95 g of triethoxysilylisocyanate dissolved in 20 ml of anhydrous diethyl ether was added dropwise. After the dropwise addition, the temperature of the whole solution was controlled at 65° C., refluxed for 13 h under the protection of nitrogen, then cooled, and the solvent was distilled off under reduced pressure. The resultant was washed three times with 20 ml of cyclohexane to obtain a pale yellow oily liquid. The obtained oily organic bridge molecules were dissolved in absolute ethanol and set aside. Dissolve 3.45g of polyvinylpyrrolidone in 10ml of N,N-dimethylformamide solution, then add dropwise the ethanol solution dissolving the organic bridge molecule, and add the ethanol solution of terbium nitrate or europium nitrate. The mixture was stirred for 4 hours at a temperature of 25° C., and then tetraethyl orthosilicate...

Embodiment 3

[0037] 2.68g of 2-acetylphenol was dissolved in 20ml of tetrahydrofuran, added to a three-necked flask and heated to flow. A solution of 4.95 g of propyl triethoxysilyl isocyanate dissolved in 20 ml of tetrahydrofuran was then added dropwise. After the dropwise addition, the temperature of the whole solution was controlled at 70° C., refluxed for 14 h under the protection of nitrogen, then cooled, and the solvent was distilled off under reduced pressure. The resultant was washed three times with 20 ml of cyclohexane to obtain a pale yellow oily liquid. The obtained oily organic bridge molecule system was dissolved in absolute ethanol and set aside. Dissolve 3.45g of polyvinylpyrrolidone in 10ml of N,N-dimethylformamide solution, then add dropwise the ethanol solution dissolving the organic bridge molecule, and add the ethanol solution of terbium nitrate or europium nitrate. The mixture was stirred for 5 hours at a temperature of 30° C., and then tetraethyl orthosilicate and ...

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Abstract

The invention belongs to the technical field of luminescent polymer composite materials, and in particular relates to a preparation method of a multicolor luminescent rare earth-polyvinylpyrrolidone polymer composite material. In the present invention, firstly, the method of organic synthesis is used to graft aromatic organic small molecules into the inorganic silicon skeleton to obtain organic bridge molecules, and then the organic bridge molecules, polyvinylpyrrolidone and rare earth ions are assembled into rare earth complexes through coordination bonds, and finally the sol is used to -Gel method The obtained complex undergoes hydrolysis and polycondensation reaction to obtain xerogel, so that the organic polymer with long carbon chain is embedded in the silicon-oxygen network matrix through covalent bonds, and the chemical gel is obtained through the drying and aging process. And polymer composite materials with stable thermodynamic properties, regular surface morphology, and characteristic fluorescence emission. The method of the invention has mild experimental conditions, can be directly obtained at room temperature without high-temperature calcination, and has strong operability and good reproducibility. The quality of the obtained product is stable, the grain size can be controlled in the range of micron and nanometer, and the shape is regular.

Description

technical field [0001] The invention belongs to the technical field of luminescent polymer composite materials, and in particular relates to a preparation method of a multicolor luminescent rare earth-polyvinylpyrrolidone polymer composite material. Background technique [0002] The rapid development of today's society has made it extremely urgent to discover the functional compounding, performance complementation and optimization of various materials, and to prepare hybrid materials with excellent performance. Therefore, as soon as the organic-inorganic hybrid system appeared, it immediately attracted great attention from scientists. All countries in the world have invested a lot of manpower, material resources and financial resources to conduct in-depth and meticulous research on this material. Generally speaking, hybrid materials have the following characteristics: inorganic substances and polymers can be combined at the molecular level or nanometer size, and have transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L39/06C08K3/28C09K11/77
Inventor 闫冰乔晓菲
Owner TONGJI UNIV
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