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Anti-counterfeiting label material with double-mode light emitting function, preparation method and application thereof

An anti-counterfeit label and dual-mode technology, applied in the field of phosphorescent materials, achieves the effects of good repeatability, large adjustment range, and large range of luminescent colors

Inactive Publication Date: 2019-10-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the invention is to solve the problem of Tb 3+ / Eu 3+ layered co-doped NaGdF 4 Realization of Tb in a multilayer core-shell structure 3 + / Eu 3+ Technical Issues of Up / Down Conversion Dual Mode Lighting

Method used

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  • Anti-counterfeiting label material with double-mode light emitting function, preparation method and application thereof
  • Anti-counterfeiting label material with double-mode light emitting function, preparation method and application thereof
  • Anti-counterfeiting label material with double-mode light emitting function, preparation method and application thereof

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preparation example Construction

[0062] like figure 1 As mentioned above, the preparation method of the anti-counterfeiting label material with dual-mode luminescence provided by the embodiment of the present invention includes the following steps:

[0063] S101, 0.3 mmol Gd(CH 3 CO 2 ) 3 ·xH 2 O, 0.5 mmol Yb(CH 3 CO 2 ) 3 4H 2 O, 0.2 mmol Eu(CH 3 CO 2 ) 3 ·xH 2 O. Add 10 milliliters of oleic acid and 15 milliliters of 1-octadecene into a 100-mL round bottom flask. Stir and heat to 130° C. under vacuum, and keep the temperature constant for 60 minutes. After the solution was naturally cooled to 50°C, the vacuum was released, and 5 ml of NaOH containing 2.5 mmol and 4 mmol of NH were added under vigorous stirring. 4 F in methanol solution. The resulting mixture was stirred at 50°C for 30 minutes. The reaction mixture was then heated to 100° C. under vacuum and held at a constant temperature for 10 minutes to remove methanol. Then fill it with argon and then evacuate it, and repeat this three ti...

Embodiment 1

[0078] The chemical formula of the anti-counterfeiting label material of the present invention is NaGdF 4 :0.50Yb / 0.20Eu@NaGdF 4 :0.15Ce@NaGdF 4 :0.50Yb / 0.20Tb@NaYF 4 . The concentrations of rare earth ions involved do not limit the scope of the invention.

Embodiment 2

[0080] The present invention adopts thermal decomposition method, 0.3 millimolar Gd (CH 3 CO 2 ) 3 ·xH 2 O, 0.5 mmol Yb(CH 3 CO 2 ) 3 4H 2 O, 0.2 mmol Eu(CH 3 CO 2 ) 3 ·xH 2 O. Add 10 milliliters of oleic acid and 15 milliliters of 1-octadecene into a 100-mL round bottom flask. Stir and heat to 130° C. under vacuum, and keep the temperature constant for 60 minutes. After the solution was cooled to 50°C, the vacuum was released, and 5 ml of NaOH containing 2.5 mmol and 4 mmol of NH were added under vigorous stirring. 4 F in methanol solution. The resulting mixture was stirred at 50°C for 30 minutes. The reaction mixture was then heated to 100° C. under vacuum and held at a constant temperature for 10 minutes to remove methanol. Then fill it with argon and then evacuate it, and repeat this three times to exhaust the air. The mixture was heated to 300° C. under a constant flow of argon gas and maintained at a constant temperature for 90 minutes. Cool to room tempe...

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Abstract

The invention belongs to the technical field of inorganic light emitting materials, and discloses an anti-counterfeiting label material with a double-mode light emitting function, a preparation methodand application thereof. The chemical formula of the anti-counterfeiting label material with the double-mode light emitting function is NaGdF4:0.50Yb / 0.20Eu@NaGdF4:0.15Ce@NaGdF4:0.50Yb / 0.20Tb@NaYF4;a plurality of layers of core-shell structures of the anti-counterfeiting label material with the double-mode light emitting function are synthesized in a mode of coating layer by layer; the thicknessof the shell layer is regulated and controlled by regulating and controlling the feeding molar ratio of each layer. The anti-counterfeiting label material disclosed by the invention has the double-mode light emitting function; moreover, the double-mode light-emitting colour has a large regulating range; the anti-counterfeiting label material with the double-mode light emitting function is high instability and high in repeatability, and has good practical and industrial prospects.

Description

technical field [0001] The invention belongs to the technical field of inorganic luminescent materials, and in particular relates to an anti-counterfeiting label material with dual-mode luminescence, a preparation method and application thereof. Background technique [0002] Currently, the closest prior art: [0003] Optical anti-counterfeiting label is an anti-counterfeiting technology that designs anti-counterfeiting label materials into specific characters or patterns, which can be directly recognized by naked eyes under the illumination of external light sources. Due to the advantages of high stability, good repeatability and adjustable luminous color, rare earth luminescent materials, especially up-conversion rare earth luminescent materials, are widely used in the field of anti-counterfeiting label materials. The optical specificity of rare earth luminescent materials largely determines the difficulty of deciphering anti-counterfeiting labels. Since the up-conversion...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/85B82Y20/00B82Y30/00B82Y40/00G09F3/02
CPCC09K11/02C09K11/7791B82Y20/00B82Y30/00B82Y40/00G09F3/02G09F2003/0276
Inventor 李广社冷稚华李莉萍
Owner JILIN UNIV
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