Upconversion fluorescent ink for inkjet printer and preparation method of upconversion fluorescent ink

An inkjet printer, fluorescent ink technology, applied in inks, applications, household appliances, etc., can solve the problems of short fixation time, unfavorable long-term storage of encrypted files, and inability to realize instant anti-counterfeiting printing, etc. Strong design, good anti-counterfeiting effect

Inactive Publication Date: 2015-02-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the UV-excited fluorescent materials currently used are organic pigments, which have a short fixation time, which is not conducive to long-term storage and the use of encrypted fi

Method used

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  • Upconversion fluorescent ink for inkjet printer and preparation method of upconversion fluorescent ink
  • Upconversion fluorescent ink for inkjet printer and preparation method of upconversion fluorescent ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one: preparation ytterbium erbium co-doped sodium fluoride yttrium (NaYF 4 :Yb,Er) nanoparticles

[0036] 0.8mmol YCl 3 , 0.18mmol YbCl 3 , 0.02mmol ErCl 3 Dissolve in 2mL ultrapure water, then add dropwise to 25mL oleic acid / octadecene mixed solvent with a volume ratio of 1:2, stir for 30 minutes, heat to 160°C to remove the moisture in the solvent, and then cool to room temperature; 2.5mmol NaOH, 4mmol NH 4 F was dissolved in 5 mL of methanol, then added dropwise to the above oleic acid / octadecene mixed solvent, stirred for 2 hours, heated to 120°C to remove methanol in the solvent; then heated to 290°C, and kept for 1.5 hours to obtain ytterbium Erbium-codoped sodium yttrium fluoride (NaYF 4 : Yb, Er) nanoparticles, wherein the molar content of ytterbium (Yb) is 18%, and the molar content of erbium (Er) is 2%, which is green under the irradiation of 980nm wavelength laser.

Embodiment 2

[0037] Embodiment two: preparation ytterbium thulium co-doped sodium fluoride yttrium (NaYF 4 :Yb,Tm) nanoparticles

[0038] 0.795mmol YCl 3 , 0.2mmol YbCl 3 , 0.005 mmol TmCl 3 Dissolve in 2mL ultrapure water, then add dropwise to 25mL oleylamine / octadecene mixed solvent with a volume ratio of 1:2, stir for 30 minutes, heat to 160°C to remove the water in the solvent, and then cool down to room temperature; 2.5mmol NaOH, 4mmolNH 4 F was dissolved in 5mL of methanol, then added dropwise to the above mixed solvent of oleylamine / octadecene, stirred for 2 hours, heated to 120°C to remove methanol in the solvent; then heated to 290°C, and kept for 1.5 hours to obtain ytterbium Thulium-codoped sodium yttrium fluoride (NaYF 4 : Yb, Tm) nanoparticles, wherein the molar content of ytterbium (Yb) is 20%, and the molar content of thulium (Tm) is 0.5%, which is blue under the irradiation of 980nm wavelength laser.

Embodiment 3

[0039] Embodiment three: prepare the sodium yttrium fluoride (NaYF 4 :Er,Tm) nanoparticles

[0040] 0.88mmol YCl 3 , 0.1mmol ErCl 3 , 0.02mmol TmCl 3 Dissolve in 2mL ultrapure water, then add dropwise to 25mL oleic acid / oleylamine / octadecene mixed solvent with a volume ratio of 1:1:2, stir for 30 minutes, heat to 160°C to remove the moisture in the solvent, and then Cool down to room temperature; 2.5mmol NaOH, 4mmol NH 4 F was dissolved in 5mL of methanol, and then added dropwise to the above mixed solvent of oleic acid / oleylamine / octadecene, stirred for 2 hours, heated to 120°C to remove methanol in the solvent; then heated to 290°C, and kept for 1.5 hours, Erbium-thulium co-doped sodium yttrium fluoride (NaYF 4 : Er, Tm) nanoparticles, wherein, the molar content of erbium (Er) is 10%, and the molar content of thulium (Tm) is 2%, which is red under the irradiation of 980nm wavelength laser.

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Abstract

The invention discloses an upconversion fluorescent ink for an inkjet printer. The upconversion fluorescent ink comprises, by weight, 1-10 parts of rare-earth doped upconversion fluorescent nanoparticles, 1600-2000 parts of ink solvent and 300-800 parts of thickener, the rare-earth doped upconversion fluorescent nanoparticles are sodium yttrium fluoride nanoparticles co-doped by rare-earth activator and rare-earth sensitizer, the rare-earth activator is erbium, thulium or holmium, and the rare-earth sensitizer is ytterbium or erbium. The upconversion fluorescent ink for the inkjet printer has the advantages of good anti-counterfeiting effect and long fixation time and storage life and can realize individualized instant anti-counterfeiting printing.

Description

technical field [0001] The invention relates to an anti-counterfeit ink for an inkjet printer and a preparation method thereof, in particular to an up-conversion fluorescent ink for an inkjet printer and a preparation method thereof. Background technique [0002] Anti-counterfeiting inks are inks for printing invisible anti-counterfeiting marks, text, images and other content for the needs of product anti-counterfeiting and important documents anti-counterfeiting. Among them, ultraviolet anti-counterfeiting ink is the most widely used. It is made of ultraviolet-excited fluorescent materials. It is invisible under ordinary light and only visible under specific ultraviolet light environments. Because its materials and excitation light sources are readily available, it is easy to forge. Most of the UV-excited fluorescent materials currently used are organic pigments, which have a short fixation time, which is not conducive to long-term storage and the use of encrypted files. I...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/30C09D11/38
CPCC09D11/30C09D11/38C09D11/50
Inventor 徐峰林敏游民黎
Owner XI AN JIAOTONG UNIV
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