【摘要】 以取代苯甲酰氯、长链伯胺（n为12,14,16）、氯乙酰氯和N,N-二甲基乙醇胺为原料,合成了一系列、含酯基和酰胺基的季铵盐阳离子表面活性剂目标产物（I-12,I-14,I-16）。通过FTIR和¹H-NMR对中间体和目标产物分子结构进行表征。在25℃,用电导率法和界面张力法分别测定表面活性剂的临界胶束浓度（CMC）和表面张力（γ）,I-16的CMC值达到4.30×10^-5mol·L^-1,计算目标产物胶束化标准吉布斯自由能(ΔG_mic⁰)、饱和吸附量(Γ_max)、空气-水界面上吸附分子的最小截面积(A_min)、降低溶液表面张力的效率(pC₂₀)和降低溶液表面张力的能力(π_CMC)。用透射电子显微镜（TEM）和动态光散射（DLS）研究I-16在水溶液中的聚集行为。在25℃,测试了表面活性剂的泡沫性能和乳化性能。结果表明,该系列表面活性剂具有较好的表面活性,其中I-16泡沫稳定性达到100%,I-14乳化性最好,乳化时间为2 388s。更多还原

【Abstract】 A series of Gemini surfactant target products（I-12, I-14,I-16）containing ester group and amide group were synthesized by using substituent group benzoyl chloride,long alkyl chain primary amine（n was 12,14,16）,chloroacetyl chloride,and N,N-dimethylethanolamine as main raw materials.The intermediate and target products were characterized by FTIR and ¹H-NMR.The critical micelle concentrations（CMC）and the surface tension(γ_CMC)of surfactants were determined by electrical conductivity measurements and surface tension method at 25℃,respectively.The CMC value of I-16 reached 4.30×10^-5mol·L^-1.The standard Gibbs energy of micellization(ΔG_mic⁰),the maximum adsorbed amount of surfactant(Γ_max),the area occupied by a single surfactant molecule at the air/water interface(A_min),the adsorption efficiency(pC₂₀)and the effectiveness of surface tension decrease(π_CMC)were calculated.The transmission electron microscope（TEM）and dynamic light scattering（DLS）were used to study the aggregation behavior of I-16 in aqueous solution.At 25℃,the foaming and emulsifying properties of the surfactants were tested.The results show that this series of surfactants had good surface activity.Among these products,I-16 foam stability reached 100%,I-14 had the best emulsification and emulsification time was 2 388 s.更多还原