Preparation method of water dispersion liquid of fluorescent polymer microsphere

Abstract

The invention belongs to the technical field of paint, and relates to a preparation method of water dispersion liquid of fluorescent polymer microsphere. The preparation method comprises the following steps: at first, dissolving tetraphenyl ethylene derivatives and an oil soluble initiator into acrylate mixed monomers, taking polyvinylpyrrolidone as the dispersion aid, dispersing the mixed organic monomers in the water phase at a high speed, and carrying out reactions for a while at a certain temperature under a certain stirring speed to obtain a fluorescent polymer microsphere water dispersion liquid system with a solid content of 25 to 75%. Due to the fixing effect of covalent bonds and wrapping effect of polymer chain segments, the movement of molecules of tetraphenyl ethylene derivatives is limited; and according to the principle of aggregation-induced emission, photoluminescence can be realized under the radiation of ultraviolet rays. Furthermore, the water dispersion liquid can be painted on a substrate to form a film, and thus can be applied to the field of fluorescent paint.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a method for preparing an aqueous dispersion of fluorescent polymer microspheres. Background technique [0002] Fluorescence is a photoluminescent phenomenon, and the application range of fluorescent materials is becoming wider and wider with the in-depth study of its properties. It has important applications in fields including organic pigments, optical brighteners, photooxidants, coatings, chemical and biochemical analysis, solar collectors, anti-counterfeiting marks, and drug tracers. Its characteristic is that it emits light when it is irradiated with ultraviolet rays, and it is completely dark when the irradiation is stopped. Composite fluorescent paint refers to the doping of fluorescent compounds into the paint polymer matrix, so that the cured coating has a fluorescent effect. Fluorescent coating is also called security coating because of its anti-counterfe...

AI Technical Summary

Problems solved by technology

[0003] Traditional composite fluorescent composite materials have the following characteristics: the wavelength range of the emitted light is wide, and the color of the light can be changed by the type of phosphor powder added; the operation is simple, and the process can be followed; but the defect lies in the mechanical properties of the material. The overall performance is not good, and the fluorescent powder is easy to fall off

In addition, traditional fluorescent molecules, such as oxadiazole and its derivatives, triazole and its derivatives, rhodamine and its derivatives, coumarin derivatives, 1,8-naphthalimide derivatives , pyrazoline derivatives, triphenylamine derivatives, porphyrin compounds, carbazole, pyrazine, thiazole derivatives, perylene derivatives, etc., due to the inherent aggregation-induced quenching effect, although the fluorescent molecules are in the solution state It has strong fluorescence characteristics in the solid state, but the fluorescence characteristics drop sharply or even disappear in the solid state, which brings difficulties to the practical application of fluorescent composite materials.

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