Comparison activating ability of three hydrogen peroxide activators
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 tin of TAED/H2O2 system was least of them.It was just 1/5 oft1/2 of peroxide-alone system,1/4 oft1/2 of acetamide/H2O2 system and dicyandiamide/H2O2 system.The activating ability order of activators was:TAED> acetamide>dicyandiamide.
Hydrogen peroxide bleaching Activator Acetamide TAED
Sheng Guo De-Yi Huang Ji-Feng She Xiang-Qun Liang
National Center of Quality Supervision and Testing for Pulp and Paper products, Station of Products Quality Supervision and Inspection in Putian, Fujian Province 351100, China
国际会议
厦门
英文
215-218
2012-12-28（万方平台首次上网日期，不代表论文的发表时间）