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Textile Research Journal
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Bleaching Cotton Fabric with Electrogenerated Oxygen—The Role of Hydroxyl and Superoxide Radicals

K. Fukatsu

Faculty of Human Life Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan

S. Kokot

Centre for Instrumental and Development Chemistry, Queensland University of Technology, Brisbane 4001, Australia

D.P. Schweinsberg

Centre for Instrumental and Development Chemistry, Queensland University of Technology, Brisbane 4001, Australia

Many active oxygen species, especially the hydroxyl radical, may play an important role in damaging cotton fabric treated at a Pt electrode with electrogenerated oxygen. To elaborate the mechanism of this damage, we have investigated the generation of hydroxyl and superoxide radicals in electrolysis and used the colorimetric thiobarbituric acid and epinephrine spectrophotometric methods, respectively, for detection.. Generation of hy droxyl radical during electrolysis is confirmed at a Pt anode but speroxide radical is not. The electro-oxidation reactions for some model carbohydrates indicate nearly the same behavior as that with Fenton's reagent. Apparently, cotton fabric damage occurs through a reaction with a hydroxyl radical that is formed on the surface of the electrode, being initiated by the abstraction of a hydrogen atom from a cellulose molecule by the hydroxyl radical.

Textile Research Journal, Vol. 69, No. 10, 769-775 (1999)
DOI: 10.1177/004051759906901011
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