Changes in the Chemical Composition of Wool During Dyeing and Finishing and Their Effects on Fabric Properties

Abstract

The chemical composition of a wool fabric is determined after each of a variety of dyeing and finishing processes. The main concern is to observe the effect of dye-fiber interactions and dyeing recipe differences. Dyeing liquor pH and decatizing have a large influence on chemical composition. Reactive dyes react at histidine and cysteine sites, and affect the behavior of cystine during dyeing and both cysteine and cystine during decatizing. Low stress fabric mechanical properties are related to cysteine levels. It is clear that cysteine plays a role in fabric property changes during processing, possibly due to its importance in the thiol-disulphide interchange reaction, which is thought to be important in stress relaxation processes.

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References

Ball, P. , Meyer, U. , and Zollinger, H. , Crosslinking Effects in Reactive Dyeing of Protein Fibers, Textile Res. J. 56 (7), 447-456 (1986).

Cameron, B.A. , The Reactions and Other Effects of Sulphamic Acid on Wool, Doctoral thesis, University of New South Wales, 1986.

Chatfield, C. , "Statistics for Technology: A Course in Applied Statistics," 3rd ed., Chapamn and Hall, NY, 1985.

Garcia, J. , The Effects of Dyeing and Finishing on the Mechanical and Physical Properties of Wool Fabrics, Doctoral thesis, University of New South Wales, Sydney, Australia, 1991.

Garcia, J. , Pailthorpe, M.T. , and Postle, R. , Effect of Dyeing and Finishing on Hygral Expansion and Other Crimp—Dependent Physical Properties of Wool Fabrics, Textile Res. J. 64, 466-475 (1994).

Kawabata, S. , "The Standardisation of the Analysis of Hand Evaluation," 2nd ed., Textile Machery Society of Japan, Osaka, Japan, 1980.

Leach, S.J. , The Reaction of Thiol and Disulphide Groups with Mercuric Chloride and Methylmercuric Iodide, I: Simple Thiols and Soluble Proteins, Aust. J. Chem. 13, 520-546 (1960).

Leach, S.J. , The Reaction of Thiol and Disulphide Groups with Mercuric Chloride and Methylmercuric Iodide, II: Fibrous Keratins, Aust. J. Chem. 13, 547-566 (1960).

Lee-Son, G. , and Hester, R.E. , Laser Raman Studies of a-bromoacrilamide Reactive Dyes on Wool, J. Soc. Dyers Colour. 106 (2), 59-63 (1990).

10.

Leon, N.H. , The Chemical Reactivity and Modification of Keratin Fibres, Textile Prog. 7, 1 (1975).

11.

Lewis, D. , The Dyeing of Wool with Reactive Dyes, J. Soc. Dyers Colour. 102 (4), 126-131 (1986).

12.

Lewis, D. , The Dyeing of Wool with Reactive Dyes, J. Soc. Dyers Colour. 98 (5/6), 165-175 (1982).

13.

Maclaren, J.A. , and Milligan, B. , "Wool Science: The Chemical Reactivity of the Wool Fibre," Science Press. Marrickville, Australia, 1981.

14.

Peryman, R. , The Effert on Wool of Boiling Aqueous Solutions, I: Solutions at pH 1.5-9 with and without Sodium Sulphate, J. Soc. Dyers Colour. 71 (4). 165-170 (1955).

15.

Thomas, H. , and Phan, K. , Alteration of Wool Proteins during Wool Dyeing, in " Proc. 8th Int. Wool Text. Res. Conf, Christchurch ," vol. IV, 1990, pp. 60-68.

16.

Weigmann, H. , Rebenfeld, L. and Dansizer, C. , The Role of Sulfhydryl Groups in the Mechanism of Permanent Setting of Wool , in "Proc. 3rd Int. Wool Text. Res. Conf, Paris," vol. II, 1965, pp. 309-317.

17.

Werkes, N. , Effect of Reactive Dyeing on the Urea Bisulphite Solubility of Wool , Melliand Textilber. 70 (1), German 52-63, English 26-32 (1989).

18.

Zweig, G. , and Sherma, J. , Eds., "CRC Handbook of Chromatography," vol. II, Chemical Rubber Company Press , Cleveland, 1972.