STUDIES ON SURFACTANT INTERACTION - RELATION BETWEEN THE INTERACTION PARAMETER OF A GENERALIZED FRUMKIN-DAMASKIN ISOTHERM AND SOME PROPERTIES OF SURFACTANT MIXTURES

The surface tensions and the contact angles of solutions of 4 differen t industrial surfactants were determined in order to characterise the adsorption at the air/solution and the solution/solid interface of bot h the individual surfactants and their mixtures. By using a generalise d adsorption isotherm the mutual interaction in the surfactant mixture s was quantified. This procedure enables the surfactant interaction at the interface to be optimised. By investigating the adsorption behavi our at a hydrophobic solid interface and characterising the cleaning e fficiency of the surfactant mixtures it was shown that mixtures of str ong mutual surfactant interaction will meet different application dema nds.