The evaluation of structural changes in wool fibre keratin treated with azo dyes by Fourier Transform Infrared Spectroscopy

Fourier Transform Infrared Spectroscopy spectroscopy is a useful technique for the analysis of structural changes in wool fibres at the molecular and supermolecular levels. Ecological requirements the textile industry has to meet oblige manufacturers to use ecological dyes in the process of fibre dy eing. These dyes should not split into the forbidden, carcinogenic aromatic amines (e.g. benzidine) while used. Wool was dyed with an azo dye, then un derwent a chemical reaction. Changes were observed in the region of Amide A , Amide B, Amide I and II, dipolar ions amino acids, and the fingerprint re gion. (C) 2000 Elsevier Science B.V. All rights reserved.