绿色复合还原剂在靛蓝染色中的应用  

Application of Complex Green Reducing Agents in Indigo Dyeing

作　　者：张晓莉[1,2] 代亚敏 杨晓羽 ZHANG Xiaoli;DAI Yamin;YANG Xiaoyu(College of Textiles,Zhongyuan University of Technology,Zhengzhou 450007,China;Collaborative Innovation Center of Textile and Garment Industry,Zhengzhou 450007,China)

机构地区：[1]中原工学院纺织学院,河南郑州450007 [2]纺织服装产业河南省协同创新中心,河南郑州450007

出　　处：《Journal of Donghua University(English Edition)》2024年第2期156-161,共6页东华大学学报（英文版）

基　　金：Project of Henan Provincial Science and Technology,China(No.182102210514)。

摘　　要：靛蓝是纺织工业中最重要的还原染料之一,靛蓝染色时,必须在还原剂作用下转化为水溶性隐色体形式。该研究旨在寻找一种复合绿色还原剂,以替代靛蓝染色中使用的对环境不利的连二亚硫酸钠(sodium dithionite,SD)。首先,比较了三种还原剂,SD、二氧化硫脲(thiourea dioxide,TD)和葡萄糖(glucose,GS)的稳定性。采用TD作还原剂剧烈搅拌2h仍能保持靛蓝染色所需还原电位,而SD和GS剧烈搅拌1h达不到靛蓝染色所需的还原电位,靛蓝染色性能下降。鉴于GS的环境友好性,选择TD与GS复合物作为靛蓝染色的复合绿色还原剂。其次,分析复合还原剂不同质量比对棉织物靛蓝染色的还原电位、pH值和K/S值的影响。当TD与GS的质量比为7:3,体系具有稳定的还原电位,可获得较好的染色性能。Indigo is one of the most important vat dyes in the textile industry,and it must be reduced to a water-soluble leuco form before dyeing.This study aims to seek a complex green reducing agent as a possible substitute for the environmentally unfavorable sodium dithionite(SD)used in indigo dyeing.Firstly,the stability of three reducing agents,SD,thiourea dioxide(TD)and glucose(GS),is compared.The reduction system of indigo dyeing with TD can maintain good stability after 2 h vigorous stirring.However,SD and GS cannot reach the reduction potential required by indigo after 1 h vigorous stirring,and the dyeing performance of indigo decreased.Considering that GS is more eco-friendly than SD,the complex of TD and GS is selected as the green reducing agent of indigo dyeing.Secondly,the reduction potential,pH and K/S values for indigo dyeing on cotton fabrics with different mass ratios of the complex reducing agents are analyzed.The results show that the optimum mass ratio of TD to GS is 7:3,and under this condition,a stable reduction potential and a high dyeing ability are obtained.

关 键 词：靛蓝染色 二氧化硫脲(TD) 葡萄糖(GS) 连二亚硫酸钠(SD) 还原电位 K/S值 

分 类 号：TS193.5[轻工技术与工程—纺织化学与染整工程]