Comparative Study of one- and two-factors Reactive Dye Adsorption Isotherms on Cellulose Fabric using Urea, Dispersing and Penetrating auxiliary Material

The aim of this article was to compare of Reactive Dye adsorption isotherm of one- and two-factors on Cotton fabric. In this study, according to the type of fabric used and the two types of dyes used with chemical bases (MCT and MCT/VS), we investigated the effect of three cooperative substances dispersing, urea and penetrating. It should be noted that the Concentration and temperature were also variable. The results of the experiments showed that all three mentioned cooperative materials cause higher penetration and stabilization and improve the stability of both types of dyes mentioned on the tested fabric, in which the use of these materials for both types of dyes is investigated and the results Shown that the order of effect of these materials was different for the two types of dyes. To determine the type of adsorption isotherm, Nernest, Langmuir and Friendlich adsorption isotherms were used and the results indicated that the Langmuir adsorption isotherm is better suited to the test results. This means that the adsorption of RR and RGB Red Reactive dyes by the cellulosic product is superheated. Finally, the results of activation energy data shown that RR dye in the presence of urea and dispersants cooperatives has the lowest activation energy and Arrhenius prediction coefficient, while this has the highest value for RGB dye.