Abstract ▼ AI-Helper

Mixed surfactant systems are attracted by many researchers because of the low cost and the synergism of the mixed surfactant systems. In this study, a thermodynamic model was applied for binary mixed surfactant systems. Some equations were derived to determine the critical micelle concentrations and...

Mixed surfactant systems are attracted by many researchers because of the low cost and the synergism of the mixed surfactant systems. In this study, a thermodynamic model was applied for binary mixed surfactant systems. Some equations were derived to determine the critical micelle concentrations and the activity coefficients of the mixed surfactant systems using the regular solution theory. Most mixed surfactant systems are known to be non-ideally mixed, and the phenomenon is quantitatively understood by a parameter to express the interaction between two pure surfactants. The equation derived from this work was applied to two binary mixed surfactant systems of CPB-CTAB and DTAB-CTAB, and Mathcad(version 7.0 professional) was used for these application. The interaction parameters of the binary mixed surfactant systems were tabulated using the ionic characterization of head group of the surfactant molecule. They trend to increases in the following order: nonionic-nonionic < cationic-cationic ＝ anionic-anionic < cationic-nonionic ＝ anionic-nonionic < nonionic-zwitterionic < cationic-anionic. The critical micelle concentration of surfactant solutions can be measured experimentally using a variety of spectroscopic methods. In this study the surface tension method was performed in detail to get the critical micelle concentration of the surfactants.

주제어