Comparison Activating Ability of Three Hydrogen Peroxide Activators

Sheng Guo; De Yi Huang; Ji Feng She; Xiang Qun Liang

doi:10.4028/www.scientific.net/AMR.641-642.215

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 641-642Comparison Activating Ability of Three Hydrogen...

Comparison Activating Ability of Three Hydrogen Peroxide Activators

Abstract:

The bleaching efficiency of hydrogen peroxide can be promoted by using suitable activator. In our research, two methods were applied to compare the activating ability of three activators, TAED (tetraacetylethylenediamine), acetamide and dicyandiamide. The first part was hydrogen peroxide bleaching. TAED was excellent, because the brightness improvement was the maximum; the viscosity was acceptable. Acetamide was an applied activator in peroxide bleaching，for it could get same effects as TAED if the bleaching process had enough time and enough dosage. In the last part our study was about the kinetics of a lignin model compounds, acetovanillone, in peroxide-alone system, TAED/H2O2 system, acetamide/H2O2 system and dicyandiamide/H2O2 system. The rate constant, k and half-life period, t1/2 can be used to compare the rate of oxidation of acetovanilone. Compared to peroxide-alone system, three systems with activator and H2O2 could accelerate the reactions of hydrogen peroxide and acetovanillone. The t1/2 of TAED/H2O2 system was least of them. It was just 1/5 of t1/2 of peroxide-alone system, 1/4 of t1/2 of acetamide/H2O2 system and dicyandiamide/H2O2 system. The activating ability order of activators was: TAED> acetamide> dicyandiamide.

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Periodical:

Advanced Materials Research (Volumes 641-642)

Pages:

215-218

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.641-642.215

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Online since:

January 2013

Authors:

Sheng Guo, De Yi Huang, Ji Feng She, Xiang Qun Liang

Keywords:

Acetamide, Activator, Hydrogen Peroxide Bleaching, TAED

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