Abstract:

Turquoise Blue 5B (C.I. Direct Blue15) was selected to dye pearl and conventional viscose fibers. Freundlich, Langmuir and Redlich-Peterson adsorption isotherm models were used to fit the experimental isotherm curves. The influence of temperature on the constants of the three isotherm equations was discussed. The results showed that Langmuir equation can be better fitted the absorption of C.I. Direct Blue15 on pearl and conventional viscose fibers than Freundlich equation, but the best result was obtained by Redlich-Peterson equation. The Redlich-Peterson absorption constants KR of C.I. Direct Blue15 on pearl and conventional viscose fibers were decreased with the increase of dyeing temperature, and the hetero factor β and absorption constants aR values showed no obvious change.