靛蓝的电化学还原及其染色工艺的探讨  

Investigation of electrochemical reduction and dyeing technology of indigo

作　　者：罗小勤[1] 樊增禄[1] 陈庭春[1] 王银银[1] 郑长征[1] 

机构地区：[1]西安工程大学纺织与材料学院,陕西西安710048

出　　处：《印染助剂》2008年第3期20-22,26,共4页Textile Auxiliaries

基　　金：生态纺织教育部重点实验室(江南大学)开放课题资助课题(KLET0620);西安工程大学研究生创新基金资助课题

摘　　要：以贵金属氧化涂层的网状钛电极为阳极(在阳极电解池中加入35 g/L H2SO4作为电解质),Cu为阴极{在阴极电解池中加入六水硫酸铁[Fe2(SO4)3·6H2O]、三乙醇胺(TEA)、NaOH作为还原染液},饱和甘汞电极为参比电极组成电解装置进行靛蓝染料(4 g/L,放在阴极电解池中)的电化学还原染色,最佳还原染色工艺为:还原[TEA 30 g/L,Fe2(SO4)3.6H2O 5 g/L,NaOH 15 g/L,外加电压5 V,阴极面积20 cm2,35℃]→染色(35℃,70 min,浴比1∶100)→在空气中自然氧化(20 min)→冷水洗→皂洗(90℃,15 min)→水洗→烘干.该工艺条件下染色织物的!K/S值为0.066,说明靛蓝电化学还原染色工艺的染色织物匀染性良好.The electrochemical reduction of indigo （4 g/L in the cathodic cell） was carried out in electrolytic equipment with reticular Ti electrode having noble metal oxidation coating as the anode （adding 35 g/L H2SO4 in the anodic cell as the electrolyte）, Cu as the cathode {adding ferric sulfate hexahydrate[Fe2（SO4）3·6H2O], triethanolamine（TEA） and NaOH in the cathodic cell as the the reductant dye liquor }, and saturated calomel electrode as the reference electrode. The optimal reduction process was reduction [TEA 30 g/L, Fe2（SO4）3·6H2O 5 g/L, NaOH 15 g/L, applied voltage 5 V, cathode surface area 20 cm^2 and 35 ℃]→dyeing （70 min at 35 ℃ with bath ratio 1：100） → natural oxidation in air （20 min） → cold water washing → soaping （15 min at 90 ℃） → water washing→drying. The fabrics dyes under these conditions had △K/S value 0.066, indicating that the fabrics dyed with this technology had good levelling property.

关 键 词：靛蓝 还原 电化学 染色 

分 类 号：TQ613.3[化学工程—精细化工]