抄録
With cotton fabric adhered with iron oxide particles, the relation between the rub-fastness behaviour and the aggregation of the particles has been investigated from the kinetic viewpoint. The aggregated states of the particles were changed by means of the sodium sulfate concentration in the preparative suspension.
The rate constant k1 of transfer of the particle from the adhered fabric to white cloth for staining, the equilibrium constant K and the amount of the particle removed from the adhered fabric to the white cloth, increased with the increase of the sodium sulfate concentration in the suspension. The lowering of the rub-fastness was attributed to the aggregation of particles.
The intercept of the straight lines of ln k1-1/W, ln k-1-1/W and ln K-1/W plots, where W is the load weight, became large with the increase of the sodium sulfate concentration. On the other hand, the slope of ln k1-1/W plots was nearly constant, those of Ink-1-1/W increased and of ln K-1/W decreased with the increase of the sodium sulfate concentration, respectively. The relation between the values of these constants and the coagulation value of iron oxide particles was discussed.
