TY - JOUR ID - TI - Effect of methanol on the surface tension and viscosity ofsodiumdodecyl sulfate (SDS) in aqueous medium at298.15e323.15 K AU - Tulasi Prasad Niraula, Sujit Kumar Shah, Sujeet Kumar Chatterjee, Ajaya Bhattarai* PY - 2018 VL - 4 IS - 1 SP - 26 EP - 34 JO - Karbala International Journal of Modern Science مجلة كربلاء العالمية للعلوم الحديثة SN - 2405609X 24056103 AB - The surface tension and viscosity of sodiumdodecyl sulfate (SDS) in water and in 0.10, 0.20, 0.30 and 0.40 volume fractions ofmethanol in water at 298.15 K, 308.15 K, 318.15 K and 323.15 K are measured. The critical micelle concentrations (CMCs) of thesolutions are determined from both the surface tension and viscosity. The critical micelle concentrations (CMC) of SDS in water aswell as in methanol-water mixture are found to increase with increase in temperature. The CMC of SDS increases with the additionof methanol. The surface properties, such as the surface excess concentrationGmax, minimum surface areaAmin, surface pressurepcmcand packing parameterPare calculated from the surface tension data. ViscosityBcoefficients of the SDS solutions arecalculated using the relative viscosity data.

ER -