Micelle Formation and Solubilization in Benzene by Fatty Acid Salts of Higher Amines

Fatty acid salts of higher aliphatic amines were prepared and used as detergents. The micelle formation in the benzene solution was verified from the relation between the van’t Hoff factor and the concentration. It was shown that the amount of solubilized water is proportional to the concentration of the detergent. The value of the critical micelle concentration was determined from the extraporation of the proportionality. This value is within the region of the remarkable decrease in the curve between the van’t Hoff factor and the concentration. With the increases of the carbon number of the amine or the acid part, the critical micelle concentration increases and the solubilizing power decreases. This result is quite different from that of aqueous solutions.