Abstract:Aniline, p-methoxy aniline, chloroacetyl chloride as materials, the amide was introduced into intermediates molecular structure by amidation. Two series of surfactants(Ⅰ, Ⅱ) were synthesized by intermediates with N, N-dimethyldecylamine, N, N-dimethyldodecylamine, N, N-dimethyltetradecylamine by quaternization respectively. The structures were characterized by 1H-NMR and IR spectra. The critical micelle concentrations (CMC), foaming, foam stability and emulsification ability of Ⅰ and Ⅱ were determined at 25℃. CMC minimum value of Ⅱ14 was 0.50 mmol/L, the best foam stability of Ⅰ14 and Ⅱ14 was 100%, the longest emulsification time of Ⅰ12 was 1602 s. Under the same conditions, for BAC-12, the CMC was 9.51 mmol/L, foam stability was 44%, the emulsification time was 366 s. The results of the tests illustrate that Ⅰ and Ⅱ showed better surface activity and better foaming, foam stability, emulsifying properties.