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Luminescent polyvinyl alcohol material and preparation method thereof

A technology of polyvinyl alcohol and alkyd acid, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem that the luminous color is not adjustable, achieve the effect of overcoming adverse effects, excellent mechanical properties, and broadening the application field

Inactive Publication Date: 2018-07-06
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminescent color of the current luminescent polyvinyl alcohol materials is not adjustable, which limits its application range to a certain extent.

Method used

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  • Luminescent polyvinyl alcohol material and preparation method thereof
  • Luminescent polyvinyl alcohol material and preparation method thereof
  • Luminescent polyvinyl alcohol material and preparation method thereof

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preparation example Construction

[0022] The preparation method of luminescent polyvinyl alcohol material according to one embodiment of the present invention comprises the following steps: dissolving polyvinyl alcohol, aldehyde acid and europium element ionic compound in a solvent, and adjusting the pH to neutral or alkaline, and then Hydrothermal solvothermal synthesis reaction at 140°C for 0.5-24 hours, after drying, the luminescent polyvinyl alcohol material can be obtained.

[0023] Hydrothermal solvothermal synthesis refers to the synthesis of reactants in water or other solvents under certain temperature and pressure conditions. The reaction is generally carried out in a closed container or autoclave, and the reaction is under subcritical or supercritical conditions. At this time, the reactivity of water or other solvents increases, and the physical and chemical properties of the substance in the solvent also change greatly, which is conducive to the generation of metastable substances with novel structu...

Embodiment 1

[0033] Weigh 3g of polyvinyl alcohol and add it to 17g of water, stir in a water bath at 90°C for 1.5 hours to obtain a polyvinyl alcohol solution with a mass fraction of 15%, and use water as a solvent to prepare Eu(NO 3 ) 3 solution and 5mol / L ammonia water.

[0034] Add 1.008g glyoxylic acid to the prepared polyvinyl alcohol solution, then add 3ml prepared Eu(NO 3 ) 3 The solution and 2.5ml of ammonia water were tested to be pH 7-8, stirred at room temperature for 30 minutes and mixed evenly, then transferred to a hydrothermal reaction kettle with a filling degree of 80%, reacted for 12 hours at 80°C for hydrothermal synthesis, and poured after cooling On a glass sheet, it is cast into a film and dried naturally to obtain a film-like luminescent polyvinyl alcohol material with adjustable luminescence.

Embodiment 2

[0036] Weigh 3g of polyvinyl alcohol and add it to 17g of water, stir in a water bath at 90°C for 1.5 hours to obtain a polyvinyl alcohol solution with a mass fraction of 15%, and use water as a solvent to prepare Eu(NO 3 ) 3 solution and 5mol / L ammonia water.

[0037]Add 1.008g glyoxylic acid to the prepared polyvinyl alcohol solution, then add 3ml prepared Eu(NO 3 ) 3 The pH of the solution and 2.5ml of ammonia water was tested to be 7-8, stirred at room temperature for 30 minutes and mixed evenly, then transferred to a hydrothermal reaction kettle with a filling degree of 80%, reacted for 12 hours at 100°C for hydrothermal synthesis, and poured after cooling On a glass sheet, it is cast into a film and dried naturally to obtain a film-like luminescent polyvinyl alcohol material with adjustable luminescence.

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Abstract

The invention relates to a luminescent polyvinyl alcohol material and a preparation method thereof. The preparation method comprises the following steps: dissolving polyvinyl alcohol, aldehyde acid and a europium ion compound in a solvent, adjusting the pH value to neutrality or alkalinity, performing thermal synthesis reaction for 0.5-24h in a hydrothermal solvent at 60-140 DEG C, and performingdrying to obtain the luminescent polyvinyl alcohol material. By the thermal mode of the hydrothermal solvent, the valence states of some europium ions are changed; by combination with the aldehyde acid with two functional groups, simultaneously, the europium ions with different valence states are bonded to polyvinyl alcohol molecules, thereby obtaining the luminescent polyvinyl alcohol material with adjustable luminescent color; and furthermore, adverse effects caused by single physical mixing are overcome, and the compatibility between europium ions and polyvinyl alcohol is good. The obtainedluminescent polyvinyl alcohol material is high in brightness and has good light transmittance and excellent mechanical properties; and the luminescent polyvinyl alcohol material with adjustable luminescent color has important application values in the aspects of decoration, counterfeiting prevention, illumination and display.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a luminescent polyvinyl alcohol material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol (PVA), as a naturally degradable and environmentally friendly polymer material, has the advantages of good water solubility, adhesion, flexibility, oil resistance, gas barrier and wear resistance. The series of polyvinyl alcohol synthetic materials produced as basic raw materials have broad application prospects in the fields of textiles, food, medicine, construction, papermaking, and printing. When the polyvinyl alcohol material has luminescent properties, its role in the application field will be further enhanced. For example, the luminescent polyvinyl alcohol material is an ideal functional decorative material and an important anti-counterfeiting material. However, the luminescent color of the current luminescent polyvinyl alcohol materials is not adj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/42C08F16/06C08J5/18C08L29/04C09K11/06C09K11/77
CPCC08F8/42C08J5/18C08J2329/04C09K11/06C09K11/7728C08F16/06
Inventor 陈万平祁传润李玲玲周阿红
Owner HUAIHUA UNIV
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