Influence of sodium carboxymethylcellulose on sodium dodecyl benzene sulfonate and sodium dioctyl sulfosuccinate micelles in the presence of phenol red dye

Strong dye-surfactant interactions and innovative formulations are required for dyeing, which is one of the most important operations in the pharmaceutical, food, cosmetic, and textile industries for colouring goods and other uses. The interactions of sodium dioctyl sulfosuccinate (AOT) and sodium dodecyl benzene sulfonate (SDBS) with the dye phenol red (sodium salt of PR) in the presence and absence of the polyelectrolyte sodium carboxymethylcellulose (NaCMC) were investigated using conductometric analysis. The critical micelle concentration (CMC) of SDBS and AOT was found to decrease as PR concentration increased in the water and NaCMC medium. However, in the presence of PR, the counterion binding (& beta;c) of SDBS and AOT increased and negative (& UDelta;G degrees mic) values indicated that micelle formation was energetically favourable. The results of the UV absorbance experiments indicated that the majority of the binding in the DBS? and DS? micelles was caused by the ketone proton groups (H+PR?) of the PR. In NaCMC media, PR (H+PR?) binding to DBS? and DS? micelles has been regulated by electrostatic interactions, which have been demonstrated by absorption data and binding constant values. According to dynamic light scattering (DLS) examinations, increasing the amount of PR increased SDBS and AOT micellar size in aqueous and NaCMC media.

Automated summary

This study investigates the interactions between dye phenol red and surfactants sodium dioctyl sulfosuccinate (AOT) and sodium dodecyl benzene sulfonate (SDBS), and finds that increasing the concentration of phenol red decreases the critical micelle concentration (CMC) of both surfactants and promotes micelle formation. In the presence of sodium carboxymethylcellulose (NaCMC), electrostatic interactions regulate the binding between phenol red and micelles.