HYDROPHOBIC INTERACTION AND ITS EFFECT ON CATIONIC DYEING OF ACRYLIC FABRIC

The influence of electrolytes on the mechanism of cationic dyeing of a crylic fabric has been investigated in terms of ionic and hydrophobic interactions. The effect of salt on hydrophobic interaction is reviewe d and used to explain the ''unusual increase of dye sorption which occ urs at salt concentrations up to 0.5 mol/l,'' described by Alberghina and co-workers. Thermodynamic analysis suggests that the ionic distrib ution coefficient of the dye (K(D)) is a function of chemical potentia l changes due to hydrophobic interactions. Therefore, K(D) depends on the type and concentration of electrolyte in the dyebath.