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Influence of grafting with acrylic acid on the dyeing properties of polyamide 6.6 fibres

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Polyamide 6.6 fibres were modified for the improvement of dyeing affinity using a graft copolymerisation method. These fibres were grafted with acrylic acid as monomer. The influence of the chemical modification of polyamide 6.6 fibres on the dyeing properties was investigated using a cationic dye (Red Astrazon 5BL). It was shown that the dye uptake of the modified fibres was greater than that of the unmodified fibres. The kinetic study of the cationic dye used at various grafting percentages showed an improvement of the dye build‐up rate, such as its exhaustion. In addition, an increase in the adsorption of the dye quantity fixed on the surface layer of the fibre made up of the grafted molecules was announced. Colour fastness to washing was improved with the grafting percentage. The modelling of the adsorption isotherms using Langmuir, Freundlich and Jossen relations allows the determination of isotherm constants. The results obtained from this modelling study show the existence of several models corresponding to various percentages of grafting.

Document Type: Research Article


Affiliations: 1: Laboratory of Polymers–Biopolymers and Organic Materials (LPBMO), Faculty of Sciences of Monastir, University of Monastir, Bd. of Environment, 5019 Monastir, Tunisia 2: Textile Research Unit, ISET of Ksar Hellal, B P 68 Ksar Hellal 5070, Tunisia

Publication date: June 1, 2012


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