Epoxy crosslinking agent EH aided fixation of brazilwood vegetable dye

The effect of epoxy crosslinking agent EH on the color fixation of cotton directly dyed with natural brazilwood dye was analyzed by K/S value,FT-IR,X-ray,DSCTGA and acid-dissolving rate testing,and reaction kinetics experiment was performed using hematein as a substitution for brazilwood dye.The results showed that under experiment conditions the reaction between hematein and epoxy crosslinking agent follows pseudo-first-order kinetics,and under alkaline condition epoxy crosslinking agent reacts simultaneously with both the hydroxy groups of hematein and cellulose.The cross linking reaction with cellulose mostly occurs in the amorphous region.