Published Paper Details:

Surface active agents find applications in food and agriculture, lubricants, ore beneficiation, detergents, textile, rubber and plastics, pharmaceuticals, biological modeling, building materials and soil sciences etc. Micelles are not formed in very dilute solutions. On increasing the concentration above CMC nearly all additional solute forms micelles. The variation in CMC of surfactants depends upon the number and chain length of monomers and properties of counter ions. As an approximation, higher the CMC value, broader is the concentration range for this transition. Above all CMC parameters vary according to whether the solute is monomer or aggregation. Since above the CMC, the activity of monomers rises very slowly, so it is also a measure of the concentration at which the thermodynamic activity of the monomers and therefore, its net surface activity and absorbability to various substrates, level off to a nearly constant value. In order to understand the colloidal behavior of anionic surfactants in mixed solvents, a systematic study on the conductance of Potassium decyl sulfate in aqueous and alkanols have been made with a view to determine whether or not the micellar aggregates are formed for such systems. CMC are determined, if any by the graphs and investigate the validity of various equations in these systems.