A series of new cationic surfactants was prepared by condensation of lactic
acid with N,N-dimethyl propylamine, followed successively by acetylation w
ith acid chloride or ester and by quaternization with dimethylsulfate. Each
surfactant and its precursors' structural assignments were based on infrar
ed spectra and H-1 and C-13 nuclear magnetic resonance spectra. Critical mi
celle concentrations, contact angles, kinetics of drop spreading, and foam
capacities were determined.