This study investigated azoic dyeing as an approach to improving the natural dyeability of silk fabric while avoiding the use of metallic mordants, which are toxic to health and the environment. An aryl diazonium salt was prepared from p-nitroaniline and used to couple with silk fabric pretreated with plant polyphenols. The interaction triggered in situ production of azo dye within the silk fibers. This dyeing approach was demonstrated to overcome the poor tinctorial strength and fastness of natural dyes. Plant polyphenols were extracted from oolong tea and mangrove bark. The CIE L*a*b* and K/S values were measured, and compared with the results of post-mordant dyeing using aluminum potassium sulfate. Even at low concentrations, aryl diazonium salt was shown to achieve deep dyeing, producing an intense brown/orange shade. The effect of azoic dyeing on color strength was strongly dependent on the primary aromatic amine concentration. At 7 % owf, the oolong tea extract produced a K/S value approximately six times that of the comparable post-mordant sample, and the mangrove bark extract approximately three times. The grater color strength achieved by the tea extract was due to the higher TPC concentration. The natural extracts conferred UV protection greater than 50 in all dyeing processes.

这项研究研究了将偶氮染色作为一种方法来提高真丝织物的天然可染性，同时又避免使用对健康和环境有毒的金属媒染剂。由对硝基苯胺制备芳基重氮盐，并将其与用植物多酚预处理的丝织物偶联。相互作用触发了真丝纤维内偶氮染料的原位产生。事实证明，这种染色方法可以克服天然染料较弱的着色力和坚牢度。从乌龙茶和红树树皮中提取植物多酚。CIE L * a * b *和K / S测量该值，并将其与使用硫酸铝钾钾进行的媒染剂染色后的结果进行比较。即使在低浓度下，芳基重氮盐也能实现深染，产生深棕色/橙色阴影。偶氮染色对色强度的影响在很大程度上取决于芳族伯胺的浓度。在owf为7％的情况下，乌龙茶提取物的K / S值约为同等的媒粉后样品的K / S值，而红树林树皮提取物的K / S值约为三倍。茶提取物获得的刨丝器颜色强度归因于较高的TPC浓度。天然提取物在所有染色过程中均具有大于50的紫外线防护。