Method for preparing lanthanide series-based NaYF4 up-conversion luminescence ink and transparent anti-fake label

A technology of luminescent ink and lanthanide series, applied in ink, identification device, instrument and other directions, can solve the problems of restricting the application of rare earth up-conversion luminescent ink, high cost of converting luminescent ink, poor anti-counterfeiting effect, etc., to achieve high anti-counterfeiting performance, high Concealment and anti-counterfeiting, high transparency effect

Inactive Publication Date: 2018-01-30
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The patent publication number is CN 105885845 A, which discloses rare earth up-conversion luminescent ink for screen printing and its preparation method and anti-counterfeiting application, but there are the following problems: (1) considering the practical application, simply using up-conversion particles as pigments, ethanol Rare-earth up-conversion luminescent inks that cannot be formulated in large quantities with solvents and are relatively expensive
(2) The pattern printed on the polyethylene terephthalate film (PET) substrate using the rare earth up-conversion luminescent ink published in this patent is white under natural light, indicating that its concealment is not good and the anti-counterfeiting effect poor (such as figure 1 as shown in a)
The above two problems limit the application of rare earth up-conversion luminescent inks in the field of anti-counterfeiting

Method used

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  • Method for preparing lanthanide series-based NaYF4 up-conversion luminescence ink and transparent anti-fake label
  • Method for preparing lanthanide series-based NaYF4 up-conversion luminescence ink and transparent anti-fake label
  • Method for preparing lanthanide series-based NaYF4 up-conversion luminescence ink and transparent anti-fake label

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Embodiment 1

[0027] Embodiment 1 of the present invention relates to lanthanide NaYF 4 Preparation of up-conversion red luminescent ink and preparation method of transparent anti-counterfeiting label. The details are as follows: 1) First, 2 mmol of sodium citrate is dissolved in 10 mL of aqueous solution, and it is completely dissolved under magnetic stirring (400 rpm), and then 1 mmol of rare earth chloride (Y:Er:Tm=88%:10 %: 2%) is dissolved in the water of 5ml, is slowly added dropwise in the above-mentioned solution to obtain mixed solution, then the oleic acid of 10ml and 5ml ethylene glycol are added to mixed solution. Finally, 1 ml of an aqueous solution in which 2.88 mmol of sodium chloride was dissolved and 4 ml of an aqueous solution in which 6 mmol of ammonium fluoride was dissolved were added dropwise in sequence. After stirring for 30 minutes, it was added and then transferred to a 50ml reaction kettle, and the reaction was continued for 6 hours in an oven at 180°C. The obta...

Embodiment 2

[0029] Embodiment 2 of the present invention relates to lanthanide NaYF 4 Preparation method of up-conversion green luminescent ink and transparent anti-counterfeit label. The details are as follows: 1) First, 2 mmol of sodium citrate is dissolved in 10 mL of aqueous solution, and it is completely dissolved under magnetic stirring (400 rpm), and then 1 mmol of rare earth chloride (Y:Yb:Er=80%:18 %: 2%) is dissolved in the water of 5ml, is slowly added dropwise in the above-mentioned solution to obtain mixed solution, then the oleic acid of 10ml and 5ml ethylene glycol are added to mixed solution. Finally, 1 ml of an aqueous solution in which 2.88 mmol of sodium chloride was dissolved and 4 ml of an aqueous solution in which 6 mmol of ammonium fluoride was dissolved were added dropwise in sequence. After stirring for 30 minutes, it was added and then transferred to a 50ml reaction kettle, and the reaction was continued for 6 hours in an oven at 180°C. The obtained precipitate...

Embodiment 3

[0031] Embodiment 3 of the present invention relates to lanthanide NaYF 4 Preparation method of up-conversion blue luminescent ink and transparent anti-counterfeit label. The details are as follows: 1) First, 2 mmol of sodium citrate is dissolved in 10 mL of aqueous solution, and it is completely dissolved under magnetic stirring (400 rpm), and then 1 mmol of rare earth chloride (Y:Yb:Tm=80%:18 %: 2%) is dissolved in the water of 5ml, is slowly added dropwise in the above-mentioned solution to obtain mixed solution, then the oleic acid of 10ml and 5ml ethylene glycol are added to mixed solution. Finally, 1 ml of an aqueous solution in which 2.88 mmol of sodium chloride was dissolved and 4 ml of an aqueous solution in which 6 mmol of ammonium fluoride was dissolved were added dropwise in sequence. After stirring for 30 minutes, it was added and then transferred to a 50ml reaction kettle, and the reaction was continued for 6 hours in an oven at 180°C. The obtained precipitate ...

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Abstract

The invention relates to a method for preparing lanthanide series-based NaYF4 up-conversion red, green and blue luminescence ink and a transparent anti-fake label. The method comprises the following steps: changing types of doping rare-earth ions, and preparing a rare-earth up-conversion material for generating red, green and blue luminescence colors with laser of 980nm; mixing up-conversion luminescence granules, ethanol and a polyacrylic resin, so as to obtain up-conversion luminescence ink. Compared with conventional luminescence ink, the up-conversion luminescence ink is excellent in florescence property, an ink formula is hard to copy, and the anti-fake property of a printed product is greatly improved. The method needs no product purification, is rapid and visible and is a novel luminescence ink preparation method which is simple and rapid to operate and high in yield. Based on a PET (Polyethylene Terephthalate) substrate, a series of transparent anti-fake labels are prepared from the red, green and blue up-conversion luminescence ink with conventional low-cost technique process spinning, silk screen printing and stamping, colored patterns can be displayed on the transparentlabels under excitation of laser of 980nm, and relatively good shielding performance and anti-fake performance are achieved.

Description

technical field [0001] The present invention relates to lanthanide based NaYF 4 The preparation method of the up-conversion luminescent ink and the transparent anti-counterfeiting label. Background technique [0002] The up-conversion luminescent material is a luminescent material with an anti-Stokes luminescence mechanism, which can emit short-wave light under the excitation of long-wave light. In recent years, most of the up-conversion luminescent materials have been used in the fields of biomarkers and fingerprints, mainly because the up-conversion luminescent materials have low toxicity, good stability, sharp emission peaks, and can only display specific luminescence under near-infrared excitation. color. The luminescence characteristic of the up-conversion luminescent material that can only emit light under fixed conditions shows that it has very good concealment, so it can also be applied to security and anti-counterfeiting. By changing the type of doped lanthanide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/107G09F3/02
Inventor 吴伟姚伟睛田青勇李娜
Owner WUHAN UNIV
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