抄録
We have investigated the effects of disulphide bond scission induced by peracetic acid and thioglycolic acid on the dye uptake of dinuclear oxidation dyes into wool fibers. The wool samples which the disulphide linkage was severed by both peracetic acid and thioglycolic acid were dyed the faint color compared to the intact wool sample. The increasing in the peracetic acid treatment time leads to more decrease in the dye uptake. These treatments lead to a slight decrease in the metal ion content in the modified wool fibers. This decrease, however, was ensured to have little effect on the dye uptakes. Consequently, this result implies that the disulphide bond within the wool fibers plays an important role in developing the colored products in the fibers. From these finding, we assumed that the disulphide bond in keratin components is attributed to the regeneration of catalytic ability of metal ions by conjugated redox reaction due to the disulphide exchange reaction, and then proposed the cyclically catalytic mechanism in which a conjugated redox reaction was carried out across the intercuticular material.
