Exhaustive and Affinitive properties of a thiophene substituted triazenyl based reactive dye on cellulose acetate pthalate-co-polyethylene glycol biopolymer film

Adebayo Ganiyu Babatunde, aliu Oluwaseyi Damilare, Arowona Mariam Temitope, Alabi Oluwadamilola Elizabeth


Abstract: The experimental exhaustion performance of a triply coupled triazenyl based reactive dye was used to establish the affinitive properties of the dye on 1:1, 1:2 and 2:1 formulations of cellulose acetate phthalate (CAP) and poly (ethylene glycol) (PEG) blends. The dye whose physicochemical properties include a melting point of 173  , theoretical yield of 73%, maximum wavelength of 535 nm and solubility in polar solvents was synthesized by doubly coupling it with 2-(aminomethyl)thiophene and singly coupled with 2-naphthol after diazotization.The maximum absorption peak at 535 nm ascertains the presence of conjugated double bond, functional groups such as hydroxyl and amino correspond to 3628 cm-1 and 1334 cm-1 respectively on the FTIR. The m/z = 415 confirms the breaking away of two ethyl thiophenyl cation while the fragmentation of the two residual amine groups is shown by the m/z value at 382 from the GC-MS. At 60°C, the first blend (CAP-PEG-1) has the highest degree of exhaustion of 89.92, partition coefficient of 180 (L-1), dye affinity of 14300 kJ/mol, while the third blend (CAP-PEG-3)has the highest degree of levelness.

Keywords: Cellulose acetate pthalate, fibre blend, reactive dye, exhaustion, Partition coefficient, dye affinity


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Chemical Society of Nigeria