In order to obtain some fundamental data on disperse dyeing from alcohols, the equilibrium adsorption is discussed from the view points of isotherm, partition coefficient and solubility.
Cellulose acetate fibere was dyed in the
n-alcohol solutions of three disperse dyes at the temperature from 30°C to 60°C.
The solubilities of the dyes in the alcohols were measured at the same temperature range.
The results are as follows;
1) The adsorption isotherms are well represented by straight lines passing through the origin and the distribution law is confirmed, as shown previously
4), 13).
2) Various
n-alcohols behave similarly to each other as a medium. In this case, there is no relationship between the solubility and the partition coefficient, whereas the following relation is found between the heat of solution (
ΔHsoln.) and the heat of dyeing (
ΔHdyeing),
ΔHdyeing+
a•
ΔHsoln.=const where
a is the constant for a given dye.
抄録全体を表示