Practical and environment-friendly indirect electrochemical reduction of indigo and dyeing.

ABSTRACT: Indigo has been widely used as a dye in the industrial dyeing due to its good color fastness in dyeing cellulose fibers. However, excess reducing agent, "insurance powder (Na₂S₂O₄)", was always used in the actual production of the factory, sparking serious pollution (water pollution and air pollution). Herein, we developed a practical and environment-friendly indirect electrochemical reduction of indigo, and applied this method for cloth dyeing. The electrochemical device was designed in the combination of source of electro-catalytic reduction and dyeing. The iron-triethanolamine-calcium gluconate (Fe-TEOA-Ca) complex played a role of key intermediate, and ultrasonic wave was found to speed up the indirect electro-catalytic process. The electrochemical perf

SUBMITTER: Yi C 

PROVIDER: S-EPMC7080776 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature