摘要
Abstract
Taking Fe-Ca-TEA complex as redox mediator, indirect electrochemical dyeing of cotton fabric with indigo was carried out. Influences of mass concentration of ferric nitrate, c alcium nitrate, triethanolamine and sodium hydroxide on dyeing results were investigated. The results showed that under conditions of ferric nitiate 10 g/L, calcium nitrate 7 g/L, triethanolamine 35 g/L, sodium hydroxide 9 g/L, 5 V of applied voltage, 30 cm2 of cathode area, reducing 50 min, good vat dyeing effects of indirect electrochemical reduction dyed cotton fabric could be obtained, which could compete with that of the traditional dyeing using sodium dithionite as reducing agents. Meanwhile, hollow fiber membrane was applied to filter to remove the undyed particles, which realize the reuse of mediator, and reduce the consumption of water and chemicals.关键词
染色/还原染料/双核络合物/电化学Key words
dyeing/ vat dyes/ binuclear complex/ electrochamistry分类
化学化工
