TX 043 THEORY OF COLOURATION

ANNA UNIVERSITY :: CHENNAI – 600 025.
M.TECH. TEXTILE TECHNOLOGY
TX 043 THEORY OF COLOURATION

1. PHYSICAL CHEMISTRY 15
First law of Thermo dynamics and its application in thermo chemistry. Second law of thermo dynamics. Free energy. Thermodynamics of solutions. Acids and bases. Surface adsorption. Adsorption at interface. Activity of dye Affinity, substantivity, heat of dyeing and entropy. The donor membrane equilibrium. Order of reactions.

2. Physical and Chemical Structure of Fibres and Dye Up-take 10
Effect of Orientation, Crystallinity, Chemical structure and Chemical modification of fibres on kinetics and equilibrium of sorption of solvent and dye molecules.

3. DYE-FIBRE BONDS 10
Surface energy and interfacial effects. Inter molecular forces. Identification of dye fibre forces. Specific dye – fibre bonds.

4. Diffusion and Rates of Dyeing 10
Fick’s law of Diffusion – Diffusion in the steady and non-steady state. Boundary layers in diffusion. Diffusion in final bath. Parameters that affect diffusion and rates of dyeing. Diffusion coefficient and concentration. Activation energies of diffusion.

TOTAL : 45

REFERENCES
1. Johnson.A., “The Theory of colouration of Textiles”, SDC Second edition, 1989. ISBN: 0901956481.
2. Peters.A.T and Freeman. H.S., “Physico – Chemical Principles of Colour Chemistry”, Blackie, 1995, ISBN: 0751402109.

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