Application of multifunctional carbon quantum dot taken as fluorescent whitening agent

Abstract

The invention discloses application of a multifunctional carbon quantum dot taken as a fluorescent whitening agent in the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like. The carbon quantum dot disclosed by the invention has the advantages of wide application field, good whitening effect and good light resistance, is innoxious and environmentally friendly, can be applied to the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like, and can generate unforeseeable technical effect because the carbon quantum dot can generate active oxygen free radicals under the condition of illumination, wherein the unforeseeable technical effect is as follows: the bacteria attached to the surfaces of spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like can be effectively killed after the spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like which are doped with the carbon quantum dot absorb ultraviolet light.

Description

technical field [0001] The present invention relates to the technical field of fluorescent whitening agents. More specifically, it relates to the application of a multifunctional carbon quantum dot as a fluorescent whitening agent. Background technique [0002] White items (such as fabrics, papers, white plastics, etc.) can absorb blue light (350-500nm) in visible light due to the organic compounds contained in them, making them slightly yellow, and at the same time, the reduction of reflected light makes people feel dull in color . The following two methods are usually used for surface whitening. One is to add a small amount of blue dye to the article, and use the complementary principle of increasing the blue color and the yellowish color of the substrate to achieve the purpose of whitening. Although this method can whiten, but because the total amount of reflected light is reduced, the color of the item is dull and gray, and the effect is not good. Another method is ch...

AI Technical Summary

Problems solved by technology

Although the current fluorescent whitening agent can produce better whitening effect, it also shows increasingly serious drawbacks

First, from the perspective of molecular structure, these fluorescent whitening agents are organic compounds with aromatic groups, which have poor water solubility and poor miscibility with other dyes, and are prone to precipitate; second, the fluorescence intensity is affected by pH changes. Larger, narrow application range; third, poor structural stability, prone to photoisomerization, resulting in poor light resistance; fourth, a large amount of chemical raw materials are used in the synthesis process and a large amount of dust is generated, which consumes a lot of energy and causes serious pollution

At present, although there are some environmentally friendly organic fluorescent whitening agents on the market at home and abroad, it is difficult to popularize them due to the difficulty of synthesis technology and high cost.

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