| This work studied the synthesis, surface chemical properties, salt effect and application of the sodium fatty acid alkanolamide sulfate.lauric acid amide sulfate salt abbreviated as FMS-12, myristic acid Monoethanolamide sulfate abbreviated as FMS-14 and palmitic acid sulfate Monoethanolamide salt abbreviated as FMS-16 were synthesized using fatty acids, methanol, ethanol, chlorosulfonic as raw material. The products were purified by solvent crystallization method. The results of the IR, element analysis and ESI-MS analysis confirmed the structure. The active content of product was determined by two-phase titrimetric method.The surface tension and critical micelle concentration (cmc) of FMS-12, FMS-14 and FMS-16 were determined by the method of drop volume, respectively. The surface tension of FMS-12, FMS-14 and FMS-16 were 25.42 mN·m-1, 43.51 mN·m-1 and 41.192 mN·m-1, respectively. The complex performance between FMS-12 andⅡ-12-3 was studied, and results showed excellent synergy was found under the mole ratio of 7 : 3. Moreover, the foam, wetting and emulsifying were also studied detailed.Micelle aggregation number (Nm) of FMS-12 was measured by fluorescent probe. The effecting factors including different concentration of FMS-12, conche entraction of alcohol, struction of alcohol and salt contraction were examined detailed. And found that the Nm was increased with the concentration increase of FMS-12 and decrease of alcohol, respectively. And Nm of FMS-12 was decreased with the chain length of alcohol and salt concentration, respectively. Besides, the micropolar of FMS-12 was decreased with concentration increase of FMS-12 and salt, respectively.The basic surface propertues of FMS-12, FMS-14 and FMS-16 were determined. And found the foam, emulsifying and wetting were better than the regular surfactants. The solubilition and detersive power were the equal as the regular surfactants. This work supplied the theory basis for detergent formulation field.
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