Carbon polymer dot ultraviolet absorbent as well as preparation method and application thereof

Abstract

The invention relates to the technical field of new materials, in particular to a carbon polymer point ultraviolet absorbent and a preparation method and application thereof.The carbon polymer point ultraviolet absorbent comprises carbon polymer points, the carbon polymer points are composed of amino acids and polyethyleneimine, the weight ratio of the amino acids to the polyethyleneimine is (5-15): (3.5-5), and the weight ratio of the amino acids to the polyethyleneimine is (5-15): (3.5-5). The carbon polymer point ultraviolet absorbent can absorb ultraviolet rays in the full wave band of 200-400 nm, and has the advantages of low toxicity and good biocompatibility; the preparation method can prepare the carbon polymer point ultraviolet absorbent with low toxicity and good biocompatibility, and the carbon polymer point ultraviolet absorbent is suitable for large-scale application in cosmetics.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a carbon polymer dot ultraviolet absorber and a preparation method and application thereof. Background technique [0002] Ultraviolet rays are divided into three categories according to the wavelength: UVA UVA (320-400nm), UVB (280-320nm) and UVC (200-280nm). UVC is absorbed by the ozone layer because the wavelength is too short, so the ultraviolet rays that mainly reach the earth's surface are UVB and UVA. High exposure to the UV component of sunlight can lead to skin cancer, especially in southern hemisphere regions such as Australia and New Zealand where high UV index leads to higher than average rates of these types of cancer. Modern sunscreens and cosmetics often contain a blend of two different UV absorbers, organic and inorganic, to protect against the harmful effects of exposure to the sun's UV components. These UV absorbers are designed to reduce UVA (320-400nm) ...

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Problems solved by technology

However, organic UV absorbers such as 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydrogen-3',5'-di-tert-phenyl)-5-chlorinated benzotriazole 2,4-dihydroxybenzophenone itself is toxic, the production process is complicated, the purity requirement is high, the ultraviolet absorption range is very narrow, and it is easy to photodegrade or decompose under long-term ultraviolet radiation; inorganic ultraviolet absorbers such as titanium dioxide, zinc oxide, etc. etc. Although the absorption range is wide, these substances are easy to agglomerate, bioaccumulate, use in daily life to affect the transparency of the material, and enrichment occurs; these inorganic materials themselves have photocatalytic properties, so they will accelerate the aging process of the material and other disadvantages

[0003] At present, carbon quantum dots are also used to absorb ultraviolet rays, but the existing carbon quantum dots still have deficiencies. For example, although Chinese patent CN202110650563 discloses a carbon quantum dot that absorbs ultraviolet light broad-spectrum, the surface of the carbon quantum dot of the patent There are one type of group and two types of groups grafted, one type of group contains at least one of C=O, C-OH, and C-NH, and the second type of group has a nitrogen-containing heterocyclic ring in a conjugated structure, However, its synthesis principle is too complicated, and the production cost is relatively high, and it involves nitrogen-containing heterocycles, with low toxicity and narrow application range

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