Photochromic ink-jet printable water-based fluorescent ink and preparation method thereof

An inkjet printing and photochromic technology, used in inks, household appliances, applications, etc., can solve the problems of narrow emission spectrum and high color purity

Active Publication Date: 2021-02-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the development of lanthanide metal functional materials, it has the characteristics of narrow emission spectrum, high color purity, bright color; strong light absorption ability, high conversion efficiency, wide emission wavelength distribution area, and relatively stable chemical properties. The combination of metal functional materials and photochromic spiropyran molecular luminescent materials is conducive to wider applications in many fields such as security and anti-counterfeiting, security inks, display devices, fluorescent sensing, and information storage, but there are no relevant reports so far.

Method used

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  • Photochromic ink-jet printable water-based fluorescent ink and preparation method thereof
  • Photochromic ink-jet printable water-based fluorescent ink and preparation method thereof
  • Photochromic ink-jet printable water-based fluorescent ink and preparation method thereof

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preparation example Construction

[0030] A kind of preparation method of the photochromic ink-jet printing water-based fluorescent ink based on lanthanide metal organic framework of the present invention, specifically comprises the following steps:

[0031] (1) Preparation of lanthanide metal organic frameworks;

[0032] 0.1 mmol lanthanide metal compound (specifically LnCl 3 ·6H 2 O, Ln=Eu 3+ or Tb 3+ ), 0.1mmol trimesic acid (H 3 BTC), 10-15ml N,N-dimethylformamide and 5-10ml deionized water were added to the beaker and stirred evenly. Transfer the uniformly mixed mixture to a reaction kettle lined with polytetrafluoroethylene, and heat it in a muffle furnace at 80-120°C for 12-24h, which has a good heat preservation effect and is conducive to the formation of lanthanide metal organic frameworks. The formation of the appearance, and it is also convenient to adjust the cooling rate. After the reaction, the reaction kettle was slowly cooled to room temperature at a temperature of 5-10 °C / h. The precipit...

Embodiment 1

[0041] A kind of preparation method of photochromic inkjet printing water-based fluorescent ink of the present invention specifically comprises the following steps:

[0042] (1) Preparation of lanthanide metal organic frameworks:

[0043] LnCl 3 ·6H 2 O (0.1mmol Ln 3+ =Eu 3+ ), trimesic acid (H 3 BTC 0.1mmol), N,N-dimethylformamide (10ml) and deionized water (5ml) were added into the beaker and stirred evenly for 1h. The homogeneously mixed mixture above was transferred to a Teflon-lined autoclave and heated at 80 °C for 12 hours. The reaction vessel was cooled slowly to room temperature at a temperature of 5 °C / h. The reaction solution generated above was separated by filtration, washed successively with N,N-dimethylformamide and deionized water, and vacuum-dried at 50°C for 12 hours to obtain white needle-like crystals, which were stored in a desiccator.

[0044] (2) Adsorption of spiropyrans by lanthanide metal organic frameworks:

[0045] 60 mg of the above-mention...

Embodiment 2

[0051] A kind of preparation method of photochromic inkjet printing water-based fluorescent ink of the present invention specifically comprises the following steps:

[0052] (1) Preparation of lanthanide metal organic frameworks:

[0053] LnCl 3 ·6H 2 O (0.1mmol Ln 3+ =Tb 3+ ), trimesic acid (H 3 BTC 0.1mmol), N,N-dimethylformamide (12ml) and deionized water (8ml) were added into the beaker and stirred evenly for 1h. The homogeneously mixed samples above were transferred to a Teflon-lined autoclave and heated at 100 °C for 20 h. The reaction vessel was cooled slowly to room temperature at a temperature of 7 °C / h. The reaction solution generated above was separated by filtration, washed successively with N,N-dimethylformamide and deionized water, and dried in vacuum at 50° C. for 12 hours to obtain white needle-like crystals. Collected samples were stored in a desiccator.

[0054] (2) Adsorption of spiropyrans by lanthanide metal organic frameworks:

[0055] The above-...

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Abstract

The invention provides photochromic ink-jet printable water-based fluorescent ink and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving lanthanidemetal chloride and trimesic acid in a mixed solution of N,N-dimethyl formamide and deionized water, carrying out hydro-thermal treatment for 12-24 hours at the temperature of 80-120 DEG C, then cooling to the room temperature, separating, precipitating, and drying to obtain a lanthanide metal organic framework; step 2, activating the lanthanide metal organic framework in methanol, and grinding theactivated lanthanide metal organic framework and 1-(2-hydroxyethyl)-3,3-dimethyl indole-6-nitrobenzopyran in a nitrogen atmosphere to obtain a compound; and step 3, dispersing the compound in deionized water and absolute ethyl alcohol, adding a sodium dodecyl sulfate solution with a mass fraction of 10% to 12%, carrying out ball milling to obtain a second dispersion liquid, finally adding a polyvinyl alcohol or polyethylene glycol aqueous solution with a mass fraction of 3% to 5%, and uniformly mixing to obtain the photochromic ink-jet printing water-based fluorescent ink.

Description

technical field [0001] The invention belongs to the technical field of photochromic materials, in particular to a photochromic inkjet printable water-based fluorescent ink and a preparation method thereof. Background technique [0002] At present, counterfeiting is becoming more and more serious, and the close combination of anti-counterfeiting technology and digital printing is of great significance for preventing illegal counterfeiting. Anti-counterfeiting ink is an important branch of anti-counterfeiting technology, that is, printing anti-counterfeiting marks on banknote documents, product trademarks or packaging in the form of ink, which has the advantages of low cost, good concealment, easy detection, and high flexibility. [0003] The study of intelligent anti-counterfeiting materials with optical modulation properties has attracted great attention in the field of materials science. Photoresponsive molecules, especially photochromic molecules, can be used to achieve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/30C09D11/32C08G83/00
CPCC09D11/50C09D11/30C09D11/32C08G83/008
Inventor 李新平张召康榭娜
Owner SHAANXI UNIV OF SCI & TECH
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