Fixation of Some Direct Dyes on γ-Irradiated Nylon-6 Fabrics Through Treatment with Cyanuric Chloride
✍ Scribed by M. M. Marie; A. M. El-Naggar; M. H. Zohdy; M. M. Abu-Amer; A. A. Miligy
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 328 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1042-7147
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✦ Synopsis
Cyanuric chloride was utilized as a crosslinking agent in forming a chemical linkage between some direct dyes and the available sites in the macromolecular structure of nylon-6. This chemical treatment was carried out on nylon-6 fabrics before and after being ␥-irradiated in air with different radiation doses. The so-called dye fixation of three direct dyes, which contain at least one amino group in their chemical structure, was assessed in terms of extraction in 50% aqueous solution of N, N-dimethylformide. It was found that the dye fixation of the direct dyes under investigation depends essentially on the cyanuric chloride concentration. However, low concentrations of ca. 1% were found to be sufficient to produce good dye fixation. Moreover, nylon-6 fabrics when irradiated prior to dyeing and treatment acquire additional dye fixation. The pH of the dyeing bath and the added solvents were found to play a specific role in the dye fixation process.