Study On The Synthesis Of Screen-ultraviolet Dye With Naphthoquinone Of Unazo Strcture

Dyes used in textile consist of natural dyes and synthetic dyes. Limited sources of natural dyes as well as higher costs, have become the bottleneck in the development of textile dyes. To meet the needs of the market, synthetic dyes have been developed rapidly just like springing, but in these synthetic dyes, azo dyes account for a large proportion. Due to the defect of the carcinogenic characteristic of azo dyes, the development of textile dye has been limited especially in the aspect of wool dyes, which resulted in the biomimetic synthesis of natural dyes in this new topic.This paper is basis of natural dyes to synthesized dyes of naphthoquinone by chemical methods. So the productive has both the virtue of natural dye and synthetic dyes in the production of large, multi-color, water-soluble good advantages. Research content:â‘ Naphthoquinone dyes having good anti-UV properties are synthesized through the Diels-Alder reaction by using 1,4-benzoquinone and 2-pyrones as main raw material;â‘¡multi-hydroxy napthoquinone dyes, which has both good anti-UV properties and water-soluble characteristic, are synthesized by Claisen reaction with the main raw material, aromatic pyruvate;â‘¢utilizing the synthetic naphthoquinones dyes as matrix, the structural modification has been done to improve dyeing properties, enhance dye chromatography; increase carbon chain and synthesis of dyes conjugated system, so the goal to improve the performance of synthetic dyes in anti-UV is achieved.Keystones and difficulties:â‘ Synthesis and the structure confirmation of Naphthoquinone;â‘¡Separation and purification of synthetic naphthoquinone;â‘¢Growing ring of naphthoquinone, the introduction of azo conjugate (C=C, C=N) chain.Here lists the preliminary achievements of the paper:â‘ 7-hydroxy-5-methyl-1,4-naphthoquinone and 6-chloro-5-hydroxy-1,4-naphthoquinone are synthesized by Diels-Alder reaction;â‘¡We use 7-hydroxy-5-methyl-1,4-naphthoquinone to stain wool, staining experiments demonstrate that the synthesis of 7-hydroxy-5-methyl-1,4-naphthoquinone has good water solubility and good UV performance and we found that the UPF values of the dyein g wool are all above 50;â‘¢Annelation of henna quinine is completed and the yield is increased.