Up-conversion light diffusion micro-sphere for panel display and preparation method thereof

Abstract

The invention discloses an up-conversion light diffusion micro-sphere for panel display and a preparation method thereof. The panel display up-conversion light diffusion micro-sphere is of a multi-shell structure and is microscopically of a sandwich structure. Erbium and magnesium bimetal composite oxide Er2O3-MgO micro-spheres are arranged on the innermost layer, the average diameter of the erbium and magnesium bimetal composite oxide Er2O3-MgO micro-spheres is 2-4 micrometers, porous g-C3N4 is arranged on intermediate layers, the thicknesses of the intermediate layers are 100-200 nm, polysiloxane condensation polymers are arranged on the outermost layer, and the thickness of the outermost layer is 400-600 nm. The panel display up-conversion light diffusion micro-sphere and the method have the advantages that a layer of porous g-C3N4 grows on each Er2O3-MgO micro-sphere in an in-situ manner to prepare porous g-C3N4 / Er2O3-MgO composite micro-spheres, and siloxane monomers are hydrolyzed, condensed and polymerized on the composite micro-spheres in an in-situ manner to obtain the panel display up-conversion light diffusion micro-sphere, accordingly, the panel display up-conversion light diffusion micro-sphere has up-conversion luminescence phenomena, and green light can be generated by the panel display up-conversion light diffusion micro-sphere excited by laser devices with the wavelengths of 980 nm; excellent light diffusion effects can be realized by light diffusion films prepared from the panel display up-conversion light diffusion micro-sphere by means of ultraviolet curing, the visible light transmittance of the light diffusion films is 90%-95%, the haze of the light diffusion films is 80%-88%, the light diffusion films have up-conversion luminescence performance and are excellent in mechanical performance, ageing resistance and flame-retardant characteristic and have multiple functions, and accordingly the up-conversion light diffusion micro-sphere for the panel display and the method are extensive in application prospects.

Description

technical field [0001] The invention relates to an up-conversion light-diffusing microsphere for flat panel display and a preparation method thereof, which belongs to the technical field of photoelectric functional materials and can be applied to the preparation of light-diffusion and up-conversion light-emitting two-in-one optical films. Background technique [0002] As a new type of light-emitting material, LED is widely used in automotive lighting, signal indicator lights, outdoor display screens, and indoor and outdoor lighting. However, because LED itself is a point light source, it will cause problems such as glare and narrow lighting area. Add light diffusion material to the resin to solve the problem. Light-diffusing material refers to an optical material with a certain light transmittance and haze. Through the difference between its own refractive index and the matrix resin, the point light source and line light source can be converted into line light source and sur...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201310101155.X discloses a light-diffusing agent for acrylic light-diffusing plates and its preparation method. The light-diffusing agent is styrene and methacryloxypropyl isobutyl cage-type oligomeric silsesquioxane random copolymer, but the polymerization reaction is difficult to control, and the shape and size of the obtained light diffusing agent are uncontrollable, resulting in poor diffusion effect of the light diffusing plate; Chinese patent 201510628802.1 discloses a preparation method of a styrene-based light diffusing Polymerization, styrene, divinylbenzene, ethylene glycol methacrylate, trimethylsilyl methacrylate, and chlorotrifluoroethylene are polymerized to obtain a styrene-based light diffusing agent. Although the invention The uniform dispersion of the light diffusing agent is achieved, but the mechanical properties and flame retardancy of the prepared light diffusing film are poor; Chinese patent 201610019716.5 discloses a modified amino resin light diffusing agent and its preparation method. After the end-capping agent reacts to eliminate the surface groups, the refractive index regulator is coated. Although this patent has the advantage of adjustable refractive index, the structure of the diffusing agent is single, and the range of refractive index adjustment is narrow, so it is impossible to realize the multifunctionality of the light diffusion film.

[0005] Current for upconversion materials and g-C 3 N 4 The research is concentrated in their respective research fields, and the report of combining the two as a light diffusing agent has never been seen.