Promotion of dihexyl dimethyl ammonium bromide to reactive dyeing of silk

This paper studied the promotion effect and kinetics of dihexyl dimethyl ammonium bromide(DDAB) to the dyeing of silk with three reactive dyes.The results showed that DDAB had effective promotion effect on reactive dyeing of silk.The balanced dye uptake of Reactive Red B-3BF,Reactive Yellow B-4RFN and Reactive Dark Blue B-2GLN was 98.7%,98.4% and 97.3%,respectively,basically reaching the maximum when the concentration of DDAB was 2.24 g/L,2.72 g/L and 3.60 g/L accordingly.And fixation rate reached 98.2%,97.4% and 96.3%,respectively.The kinetics of the three reactive dyes on silk with DDAB as promoter was found to fit the pseudo second-order adsorption kinetics equation well.Meanwhile the apparent activation energy of Reactive Red B-3BF,Reactive Yellow B-4RFN and Reactive Dark Blue B-2GLN on silk with DDAB as promoter was 18.23,14.83 and 15.75 kJ/mol,respectively.