Study on Synthesis of Some Azo Disperse Dyes from 1-Substituted 2-Hydroxy-6-pyridone Derivatives and Their Colour Assessment on Polyester Fabric | Chapter 2 | Recent Progress in Science and Technology Vol. 5

 A order of 3-(p-substituted phenylazo)-6-pyridone dyes that can be used to dye polyester structures are created, and its combination is discussed. Various solvent were used to analyse the dyes' visible absorption ranges, and it was discovered that the compounds liquid displayed an evenness between hydrazone and common anion. The photoelectric absorption ranges cover a λmax range of 404 -464 nm in DMF at uniformly extreme absorption force between 5.33 × 104 - 8.55 × 104 l•mol–1•cm–1 and gave sunny intense hues of yellow to combination of red and yellow on polyester fabrics. The dyes have excellent exhaustion between 72% and 79% for polyester structures, are more intense, and have excellent fastness properties on polyester textures, according to calculations of the colour parameters of the dyed matters. The extraordinary level of levelness and shine after washing indicate good penetration and strong similarity of these dyes for the polyester fabric.

Author(s) Details:

Kurenkaka Johnson Sakoma,
Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria.

Kasali Ademola Bello,
Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria.

Mohammed Kabir Yakubu,
Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria.

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Study on Performance Evaluation of Fluorescence and Photostability of Coumarin Disperse Yellow 82 | Chapter 7 | Current Perspectives on Chemical Sciences Vol. 6

 In various fields of research, fluorescent dyes are used, such as in biochemical studies, medical diagnosis, photoelectric cell building, lasers and solar batteries. Some major fluorescent and photostability properties of Coumarin Disperse Yellow 82 are listed in this paper. The research aims to test the spectrophotometric fluorescence colour of Coumarin Diffuse Yellow 82. Spectral parameters such as relative strength percentage and reflectance on polyester and polyester/cotton substrates with different dye concentrations were evaluated. The property of light rapidity was also evaluated. Evaluation of the quantum dye photodegradation yield in methanol, ethanol and N,N-dimethylformamide (DMF) was also investigated under aerobic and anaerobic conditions. In contrast to the dyed polyester/cotton blend, the relative strength, reflectance and light fastness of dyed polyester for the various dye concentrations were shown to be higher. For the different concentrations of dye used, the photodegradation quantum yield of dye in methanol, ethanol and DMF solutions under anaerobic conditions showed higher quantum dye photodegradation in DMF. Irradiation under the nitrogen atmosphere achieved higher degradation under aerobic conditions, while the presence of air decreased degradation. It can be concluded that alcohol is marginally better than DMF as a model solvent for predicting the photostability of Coumarin Disperse Yellow 82 on polyester, in accordance with the approximate degradation quantum yields of the examined dye in methanol, ethanol and DMF.

Author(s) Details

Aba Akebi Atta-Eyison
Department of Industrial and Health Sciences, Takoradi Technical University, Box 256, Takoradi, Ghana.

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