Preparation method of fluorescent structural color pigment and application thereof

Abstract

The present application relates to the field of pigments, and discloses a preparation method of a fluorescent structural color pigment and application thereof.The preparation method comprises the following steps: 1) using N-(beta-aminoethyl-gamma-aminopropyl)methyldimethoxysilane as a passivation agent and citric acid as a carbon source, a silane functionalized carbon quantum dot mother liquor is prepared by a hydrothermal method; and 2) mixing carbon black containing hydroxyl groups on the surface and the silane functionalized carbon quantum dot mother liquor with a silicon source, and performing a hydrolysis reaction under alkaline conditions to obtain carbon quantum dot hybrid silica coated carbon black nanospheres.A new type of fluorescent structural color pigment is prepared by combining carbon quantum dots with photonic crystal structural color materials.Compared with a simple physical doping method, the carbon quantum dots are doped in the shell layer of the photonic crystal structural color material through a clever chemical modification method in the present application, so that the dispersion of the carbon quantum dots can be better realized, and the fluorescence quenching phenomenon caused by local high concentration aggregation or contact with metal ions can be avoided.

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