间接电化学还原染色媒介体系对比研究  

Comparative study of media systems for indirect electrochemical reduction dyeing

作　　者：杨杰[1,2] 徐棚棚[1,2] 俞丹[1,2] 王炜[1,2] 

机构地区：[1]东华大学化学化工与生物工程学院,上海201620 [2]生态纺织科学技术教育部重点实验室,上海201620

出　　处：《印染助剂》2013年第2期20-23,共4页Textile Auxiliaries

摘　　要：以玻碳电极为工作电极,比较了Fe(Ⅲ)-草酸-葡萄糖酸钙与Fe(Ⅲ)-TEA-葡萄糖酸钙媒介体系的循环伏安曲线,探讨了体系的氧化还原性.Fe(Ⅲ)-草酸在碱性条件下不能稳定存在,但在加入葡萄糖酸钙(DGL)后,Fe(Ⅲ)-草酸在pH≥13的强碱性条件下依然能稳定存在,2种体系都表现出受扩散控制的准可逆反应过程.当n(草酸)∶n(Fe3+)∶n(DGL)=2∶1∶1时,电解30 min氧化还原电位能达到-1 019.2 mV.2种体系的染色效果(K/S及CIELab)都与传统保险粉染色效果相当.The cyclic voltammetric curves of the ferric-oxalate-calcium gluconate and the ferric-TEA-calcium gluconate medium systems were investigated using a glassy carbon electrode as working electrode, and the redox properties of the two systems were also explored. The ferric-oxalate system was unstable under alkaline condition. However, in the presence of calcium gluconate, ferric-oxalate system exhibited good stability in strongly alkaline （pH≥13） media. Moreover, both systems displayed a quasi-reversible reaction which was controlled by diffusion. When the molar ratio of n（oxalate）：n（Fe3＋）：n（DGL） was 2：1：1, the redox potential of the electrolyte achieved -1 019.2 mV after 30 min of electrolysis. Color depth was characterized by the K/S value and CIELab, and the dyeing result was comparable with the conventional samples dyed using sodium dithion- ite as the reducing agent.

关 键 词：循环伏安曲线 电化学还原 K S值 还原艳绿FFB 络合物 

分 类 号：TQ151.5[化学工程—电化学工业] TS193.72[轻工技术与工程—纺织化学与染整工程]