Nanoparticles, methods for their preparation and use in fluorescent inks
By surface modification of lanthanide rare earth-doped NaYF4 nanoparticles and combining them with water-based polyurethane/polyacrylic acid emulsion, the problems of low luminescence intensity, poor thixotropic properties, and high environmental pollution in existing anti-counterfeiting technologies have been solved, resulting in the preparation of a high-fluorescence-intensity, environmentally friendly fluorescent ink suitable for various printing methods.
CN119391401BActive Publication Date: 2026-07-21SHAANXI DADI IND CO LTD OF CHINA NAT NUCLEAR +1
View PDF 3 Cites 0 Cited by
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI DADI IND CO LTD OF CHINA NAT NUCLEAR
- Filing Date
- 2024-08-28
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing anti-counterfeiting technologies suffer from problems such as low luminous intensity, poor thixotropic properties, poor printability, and significant environmental pollution.
Method used
Nanoparticles were prepared by surface modification of lanthanide rare earth-doped NaYF4 upconversion nanoparticles with polyacrylic acid, and then applied to fluorescent inks to form an optical anti-counterfeiting phenomenon in combination with waterborne polyurethane/polyacrylic acid emulsion.
Benefits of technology
We have developed fluorescent inks that are high in fluorescence intensity, environmentally friendly and non-toxic, and highly adaptable to printing. They are suitable for various printing methods and meet environmental standards.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN119391401B_ABST
Abstract
The application provides a kind of nanoparticle and its preparation method and fluorescent ink use, the preparation method of the nanoparticle includes: surface modification is carried out to polyacrylic acid and lanthanide-doped NaYF4 upconversion nanoparticle, wherein the mass ratio of polyacrylic acid and the lanthanide-doped NaYF4 upconversion nanoparticle is 1:5-50.The nano material has the characteristics of small size, large specific surface area, and a large number of rare earth ion luminescence centers on the surface, and also has the advantages of high luminescence efficiency and strong fluorescence intensity. The nanoparticle is used to prepare vegetable oil-based fluorescent ink, and the obtained anti-fake ink has the advantages of no organic solvent volatilization, no radioactive elements, non-toxic and harmless, and good environmental protection effect; and the ink is uniform and stable, has strong acid and alkali resistance, and meets the performance standards of the relevant industry; it also has the advantages of high fluorescence intensity, good color development, beautiful printed pattern effect, and sustainable luminescence.
Need to check novelty before this filing date? Find Prior Art