Year: 2025
Type: article
Abstract: Re‐evaluation using the Williams‐Landel‐Ferry equation, of exhaustion/fixation/adsorption data previously reported for four classes of anionic dye onto three different types of wool substrate, revealed that thermally activated dyeing/desorption behaviour is governed by the thermally regulated structural relaxation times of the respective water‐saturated, water‐swollen, water‐plasticised α‐keratin macromolecule over the broad 25°C to 100°C range of dyeing/desorption temperatures considered. The plasticisation model of dye diffusion therefore offers a satisfactory explanation of the temperature dependent diffusivity of the acid dye, mordant dye, reactive dye and direct dye within the water‐plasticised α‐keratin macromolecules: the temperature dependent exhaustion/fixation/adsorption behaviour of the various anionic dyes onto wool therefore accords with Free Volume Theory.
Source: Coloration Technology
DOI: 10.1111/cote.70016
Author: Stephen M. Burkinshaw
Institution: University of Leeds
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,950
OpenAlex ID: W4413890107