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CN-121991553-A - Quantum dot printing ink and preparation method thereof

CN121991553ACN 121991553 ACN121991553 ACN 121991553ACN-121991553-A

Abstract

The invention provides quantum dot printing ink which comprises, by mass, 10-30% of quantum dots, 20-50% of hydroxy acrylic resin, 1-10% of functional monomers, 1-10% of modified epoxy resin, 0.1-2% of photoinitiators, 0.1-1% of leveling agents and 10-50% of solvents, wherein the modified epoxy resin is acrylic acid modified epoxy resin. According to the invention, the compatibility of the epoxy resin with the hydroxy acrylic resin, the functional monomer and other components is enhanced by introducing the acrylic structure into the epoxy resin, so that the components are dispersed, the quantum dots are uniformly dispersed in an ink system, the film forming uniformity of the ink is effectively enhanced, meanwhile, a plurality of active groups among the components are subjected to a crosslinking effect and generate intermolecular acting force, a more three-dimensional network structure is obtained, the quantum dots can be adsorbed by the structure, the quantum dot printing ink with better uniformity and stability is obtained, and the luminous efficiency is improved.

Inventors

  • LI YUANYUAN
  • LIU GE

Assignees

  • 惠州学院

Dates

Publication Date
20260508
Application Date
20241107

Claims (10)

  1. 1. The quantum dot printing ink is characterized by comprising the following components in parts by mass: Wherein, the The modified epoxy resin is acrylic acid modified epoxy resin.
  2. 2. The quantum dot printing ink of claim 1 wherein the quantum dot is selected from one or more of group IIB-VIA, group IIIA-VA, group IVA-VIA, group IB-IIIA-VIA, group IIB-IVA-VIA, group IIA-IVB-VA, group VIII-VIA single or composite structure quantum dots or perovskite quantum dots.
  3. 3. The quantum dot printing ink of claim 1 wherein the functional monomer is trimethylolpropane trimethacrylate.
  4. 4. The quantum dot printing ink of claim 1 wherein the photoinitiator is selected from one or more of benzil, aroylphosphine oxide, benzophenone, alkyl benzophenone, or benzoyl formate.
  5. 5. The quantum dot printing ink of claim 1 wherein the leveling agent is selected from one or more of an acrylic leveling agent, a silicon leveling agent, or a fluorine leveling agent.
  6. 6. The method for preparing the quantum dot printing ink as claimed in any one of claims 1 to 5, comprising the steps of: S1, blending epoxy resin and o-hydroxyaniline, and heating for reaction to obtain an intermediate product; s2, blending the intermediate product, acrylic acid and tri (2-hydroxyethyl) isocyanurate triacrylate, and heating for reaction to obtain modified epoxy resin; And S3, uniformly blending the quantum dot, the hydroxy acrylic resin, the functional monomer, the modified epoxy resin, the photoinitiator, the flatting agent and the solvent to obtain the quantum dot printing ink.
  7. 7. The method for preparing the quantum dot printing ink according to claim 6, wherein the mass ratio of the epoxy resin to the o-hydroxyaniline is 1 (1-3).
  8. 8. The method for preparing a quantum dot printing ink according to claim 6, wherein in the step S1, the heating temperature is 50-70 ℃ and the reaction time is 30-60min.
  9. 9. The method for preparing the quantum dot printing ink according to claim 6, wherein the mass ratio of the intermediate product to the acrylic acid to the tri (2-hydroxyethyl) isocyanurate triacrylate is 1 (0.5-2): 0.01-0.05.
  10. 10. The method for preparing a quantum dot printing ink according to claim 6, wherein in the step S2, the heating temperature is 90-120 ℃, and the reaction time is 30-60min.

Description

Quantum dot printing ink and preparation method thereof Technical Field The invention relates to the field of quantum dot printing ink, in particular to quantum dot printing ink and a preparation method thereof. Background The quantum dot luminescent material has obvious quantum confinement effect, and the effect endows the material with the characteristics of adjustable luminescent wavelength, high luminescent efficiency, good light stability, long service life, excellent solution processability and the like, so that the material plays an important role in a plurality of fields such as novel display, LED illumination, biological imaging, fluorescent marking and the like. And quantum dot ink is one of representative applications of quantum dot luminescent materials. In the prior art, quantum dot ink generally disperses quantum dot luminescent materials directly in a solvent, and the method has some problems. For example, when a solvent having high dispersion stability such as toluene or chloroform is used, the obtained quantum dot ink has low viscosity and low boiling point. When a high molecular polymer with larger viscosity is used as a solvent, the dispersion effect on the quantum dot luminescent material is not ideal, the film forming uniformity is affected, and the introduced insulating polymer additive tends to reduce the charge transmission capability of the film. In addition, the quantum dot ligand may generate dissociation equilibrium under a complex solvent environment, and the change of external environment may cause the damage of the dissociation equilibrium, thereby affecting the storage stability of the ink and affecting the uniformity and luminous efficiency of the quantum dot ink. In view of the foregoing, it is necessary to develop a new technical solution to solve the problems existing in the prior art. Disclosure of Invention The invention provides quantum dot printing ink which is prepared from quantum dots, hydroxy acrylic resin, functional monomers, modified epoxy resin and the like. The modified epoxy resin is acrylic acid modified epoxy resin, the compatibility of the modified epoxy resin with the hydroxy acrylic resin, the functional monomer and other components is enhanced by introducing an acrylic acid structure into the epoxy resin, the components are dispersed, the quantum dots are dispersed in an ink system uniformly, the film forming uniformity of the ink is effectively enhanced, meanwhile, as the modified epoxy resin has epoxy groups and acrylic acid structures, after the modified epoxy resin is compounded with the hydroxy acrylic resin, the functional monomer and other components, various active groups among the components are crosslinked, and intermolecular acting force is generated, so that a more three-dimensional network structure is obtained, the quantum dots can be adsorbed by the structure, the quantum dot printing ink with better uniformity and stability is obtained, and the luminous efficiency of the quantum dot printing ink is improved. The invention aims to provide quantum dot printing ink which comprises the following components in parts by weight: Wherein, the The modified epoxy resin is acrylic acid modified epoxy resin. Further, the quantum dot is selected from one or more of IIB-VIA group, IIIA-VA group, IVA-VIA group, IB-IIIA-VIA group, IIB-IVA-VIA group, IIA-IVB-VA group, VIII-VIA group single or composite structure quantum dot or perovskite quantum dot. Further, the functional monomer is trimethylolpropane trimethacrylate. Further, the photoinitiator is selected from one or more of benzil, aroyl phosphine oxide, benzophenone, alkyl benzene ketone or benzoyl formate. Further, the leveling agent is selected from one or more of acrylic leveling agents, silicon leveling agents or fluorine leveling agents. Further, the solvent is selected from one or more of alcohols, ethers, glycol ether acetates, acetonitrile, dimethyl sulfoxide or dimethylformamide. The invention also provides a preparation method of the quantum dot printing ink, which comprises the following steps: S1, blending epoxy resin and o-hydroxyaniline, and heating for reaction to obtain an intermediate product; s2, blending the intermediate product, acrylic acid and tri (2-hydroxyethyl) isocyanurate triacrylate, and heating for reaction to obtain modified epoxy resin; And S3, uniformly blending the quantum dot, the hydroxy acrylic resin, the functional monomer, the modified epoxy resin, the photoinitiator, the flatting agent and the solvent to obtain the quantum dot printing ink. Further, the mass ratio of the epoxy resin to the o-hydroxyaniline is 1 (1-3). Further, in step S1, the heating temperature is 50-70 ℃, and the reaction time is 30-60min. Further, the mass ratio of the intermediate product, the acrylic acid and the tri (2-hydroxyethyl) isocyanurate triacrylate is 1 (0.5-2): 0.01-0.05. Further, in step S2, the heating temperature is 90-120 ℃, and the reaction time is 30-60min. The invention