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Abstract

The equations of a dimensionless Donnan model for equilibrium sorption of ions by polymers are applied to sorption data for acid dyes in binary mixtures on nylon 66 fabric. The two acid dyes are commercial samples of C.I. Acid Blue 25 and C.I. Acid Yellow 49. Excellent fits of the data to the dimensionless model are obtained. The ratio of the distribution coefficients of the two dyes in the mixtures is estimated. Dimensionless sorption parameters have a linear dependence on the initial dye concentrations in the finite dyebaths and a linear dependence on the initial salt concentration. The equilibrium concentration distribution ratios of the two dyes on the fabric are linearly related to the ratios of their initial dyebath concentrations.

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References

Arora

M. S.

McGregor

, Dimensionless Groups for the Equilibrium Sorption of Polysulfonated Acid Dyes by Polyamides, Textile Res. J. 65 (7), 385–391 (1995).

Grieder

, Determination of Acid-dye Standard Affinities for Nylon Fibres from Sorption Isotherms, J. Soc. Dyers Colour, 92, 8–13 (1976).

McGregor

Iijima

, Dimensionless Groups for the Description of Sorption Equilibria in Dyeing with Anionic Dyes, I: Inorganic Co-Ion Exclusion, J. Appl. Polym. Sci. 41, 2969–2782 (1990).

McGregor

Iijima

, Dimensionless Groups for the Sorption of Dye and Other Ions by Polymers, II: Hydrochloric Acid, C.I. Acid Blue 25, and Polyamides with an Excess of Basic Groups, J. Appl. Polym. Sci. 45, 1011–1021 (1992).

McGregor

Harris

P. W.

, A Chemical Engineering Approach to Dyeing Problems: The Sorption of Acid Dyes by Polyamides, Research Monograph M-20, Allied Chemical Fibers Division, Petersburg, Virginia, 1969.

MINSQ, A program for nonlinear curve fitting and mode) development, Micromath Scientific Software, Salt Lake City, Utah, 1992.

Powell

M. J. D.

, A FORTRAN Subroutine for Solving System of Nonlinear Algebraic Equations, ch. 7 in “Numerical Methods for Nonlinear Algebraic Equations,” Robinowitz

, Ed., Gordon and Breach Science Publishers, NY, 1970.

Yang

Lian

, Ion sorption by polyamide with consideration of ionic interaction and other physical interactions, private communication, University of Illinois at Urbana-Champaign.

Yang

, Effect of Electrolytes on Hydrophobic Interactions During Dyeing, AATCC Book Papers, 266–269 (1992).

A Dimensionless Model for the Equilibrium Sorption of Mixtures of Acid Dyes by Polyamides from Finite Dyebaths

Abstract

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