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首页> 外文期刊>Textile Chemist and Colorist >Continuous Sulfur Dyeing without Reducing Agents: Fully Reduced Sulfur Black 1 by Cathodic Reduction
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Continuous Sulfur Dyeing without Reducing Agents: Fully Reduced Sulfur Black 1 by Cathodic Reduction

机译：在不使用还原剂的情况下连续进行硫染色：通过阴极还原完全还原的硫黑1

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摘要

The electrochemical reduction of sulfur dyes was examined with regard to the substitution of nonregenerable reducing agents in dyeing processes. The redox behavior of Leuco Sulfur Black 1 was characterized by photometric and potentiometric methods. In the presence of a surplus of reducing agent, the disulfide groups and the quinoneimine groups were reduced. A comparable degree of dye reduction could be achieved by cathodic reduction. The cathodically reduced sulfur dye had a reduction capacity of sufficient magnitude to serve as a reducing agent and antioxidant by itself. The cathodically reduced dye was used for one-bath pad-steam dyeing experiments. The color depth and shade of the dyed samples corresponded to standards dyed with the use of reducing agents, thus indicating that full substitution of reducing chemicals by cathodic dye reduction can be achieved. The described electrochemical technique offers ecological and economic advantages in combination with sulfide free sulfur dyeing.
机译：关于在染色过程中不可再生还原剂的替代，研究了硫染料的电化学还原。 Leuco硫黑1的氧化还原行为通过光度法和电位法进行了表征。在过量的还原剂存在下，二硫基和醌亚胺基被还原。通过阴极还原可以实现相当程度的染料还原。阴极还原的硫染料具有足够大小的还原能力以单独用作还原剂和抗氧化剂。阴极还原的染料用于一浴浸轧-蒸汽染色实验。染色样品的色深和色泽与使用还原剂染色的标准品相对应，因此表明可以实现通过阴极染料还原完全替代还原化学品。所述的电化学技术与无硫化物的硫染色结合提供了生态和经济上的优势。

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