Senthilkumar, S. and Firozbabu, K. and Noel, M. and Anbukulandainathan, M. (2009) Redox mediated electrochemical method for vat dyeing in ferric-oxalate-gluconate system: process optimization studies. Journal of Applied Electrochemistry, 39 (12). pp. 2569-2577. ISSN 0021-891X

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Abstract

Preliminary efforts were made to identify alternative ligands for relatively greener and cheaper than triethanolamine (TEA), leading to a new ferric-oxalategluconate mixed ligand system as a potential alternative. Cyclic voltammetry was employed to study the mechanism involved. A low concentration of electrogenerated FeII- oxalate is transformed into FeII-gluconate, which is the reducing agent in the overall process. The influences of electrolyte medium, electrode material, nature of dye, dye concentration, material to liquor ratio (MLR), and other related parameters were studied to arrive at optimum experimental condition. Copper cathode and stainless steel anode were the material of choice. The optimum cathode current density was found to be 2.30 mA cm-2. Under optimum condition, both cotton fabric and yarn could be efficiently dyed using this electrochemical process. The electrolyte could also be recycled. Color intensity for different dyed materials was evaluated using K/S values according to the Kubelka–Munk equation.

Item Type:	Article
Uncontrolled Keywords:	Indirect electrolysis; Ferric-complex; Calcium gluconate; Oxalic acid; Vat dyes; Cyclic voltammetry; Electrochemical dyeing
Subjects:	Electroorganic
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	19 Jan 2012 09:19
Last Modified:	19 Jan 2012 09:19
URI:	http://cecri.csircentral.net/id/eprint/394

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