دراسة الخواص السطحية للمحاليل المائية لمادة فعالة سطحياً غير ايونية (C12E7) ومادة فعالة سطحياً انيونية (SDBS) ومزيجهما وتاثير اضافة مواد عضوية ولا عضوية لمحاليل كل منهما

Surface tension measurement were carried out for nonionic surfactant Alcohol Ethoxylated (C12E7) and anionic surfactant Sodium Dodecyl Benzene Sulphonate (SDBS) and their mixture by means of Du Nouy ring tensiometer in aqueous solution, at room temperature (298˚K±2), Critical micelle concentration (CMC), maximum surface excess (Γmax), minimum area per molecule (Amin) and equilibrium constant of adsorption at water-air interfaces were evaluated from a surface tension vs log10C plot(C is concentration). The effect of adding organic or inorganic compounds used mainly in detergents on the surface tension values has been studied in the condition that the concentration of surfactant (7%) and the concentration of any additive is the concentration mentioned in the Syrian National Standard (SASMO) for low foam household detergent (272/2011). Also the effect of adding the previous compounds at different concentrations 2%,4%, 6% on the cloud point of nonionic surfactant (C12E7) 1% has been studied, and changes of the cloud point with concentration of each compound separately Tcl = f (c) has been plotted.