Abstract
In order to improve the dyeing properties of reactive dyes onto cotton fabric in reverse micelles, non-ionic mixed reverse micelles were prepared using non-ionic TX-100 and Span40 as a dyeing media. The maximum water solubilization, diameter of water pool, aggregation density, and conductivity values of the reverse micelles with different concentrations of TX-100/span40 were measured and compared. The adsorption and dyeing capacity of reactive dyes on cotton fabric in reverse micelles were investigated. Additionally, the Lagergren first-order equation and the pseudo second-order equation were also employed to fit the experimental data. The results indicated that the diameter of water pool and packing density of reverse micelles were increased with an increasing amount of Span40, which caused lower conductivity. The repelling force and competitive adsorption between the dyes and cotton fabric were decreased with an increasing amount of Span40, and the higher adsorption and improved dyeing properties in reverse micelles were obtained. Moreover, the dye adsorption process in mixed TX-100/Span40 reverse micelles could be described using pseudo-second-order kinetic equations. The adsorption is a chemical process.
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