Critical micelle concentration unsaturation

Fig. 13. Relation between the critical micelle concentration (CMC) of self-emulsifying unsaturated polyesters (EUP) and their Mn[119,120].

Contrarily to fatty add salts (i.e., sodium laurate soap), the long-chain iV -acyl amino adds have excellent water solubility (due to the presence of additional CO-NH linkages), quick biodegradability and good lime resistance (i.e., caldum ion tolerance) [11]. The surfactant properties of pure sodium salts of iV -acyl amino acids (anionic surfactants) with different alkyl chains (saturated and unsaturated with 10-18 carbon atoms) and amino acid residues have been described and compared with those of sodium lauryl sulfate (SLS) and sodium laurate [11-14]. The authors showed that the critical micelle concentration (CMQ of the amino acid-based surfactants was lower than that of the SLS but higher than that of sodium laurate. The surface activity increased and the CMC decreased by raising the alkyl chain... 

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