Synthesis and characterisation of Azo dyes derived from Naphthalen-2-ol and their washfastness properties on cotton, wool and nylon fabrics
1 Ahmadu Bello University Zaria
2 Department of Polymer and Textile Science, Ahmadu Bello University Zaria, Nigeria
3 Petrochemical and Allied Division, National Research Institute for Chemical Technology, Zaria
* Corresponding author: agiwa@abu.edu.ng
2 Department of Polymer and Textile Science, Ahmadu Bello University Zaria, Nigeria
3 Petrochemical and Allied Division, National Research Institute for Chemical Technology, Zaria
* Corresponding author: agiwa@abu.edu.ng
Abstract
A series of azo dyes was synthesised by coupling reaction of napththalen-2-ol with diazotized 4- sodiumphenolate, 4-Nitrophenylazo and 4-Chlorophenylazo respectively, as diazo components. The characterization of the dyes was carried out by GC/MS analysis. The solubility of dyes in the visible absorption spectra was also determined. The dyeing performances of the three dyes were assessed on cotton, wool and nylon fabrics, also determined are the molar absorbtivity, dyebath exhaustion (%E) and dye fixation (%F). The dyed fabrics show very good washing fastness properties for wool and nylon and moderate for the cotton fabric. These dyes were found to give bright yellow to purple colour shades with very good depth and levelness on the fabrics. The dyebath exhaustion and fixation on the various fabrics were also found to be very good.
Keywords
Diazotization
coupling
dyeing
exhaustion
fixation
fastness
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How to Cite
Giwa, A., C., M. A., & M., U. S. (2016). Synthesis and characterisation of Azo dyes derived from Naphthalen-2-ol and their washfastness properties on cotton, wool and nylon fabrics. Nigerian Journal of Materials Science and Engineering, 7(1), 141-142.
A. Giwa, M. A. C., and U. S. M., "Synthesis and characterisation of Azo dyes derived from Naphthalen-2-ol and their washfastness properties on cotton, wool and nylon fabrics," Nigerian Journal of Materials Science and Engineering, vol. 7, no. 1, pp. 141-142, June 2016.
