羧酸盐型Gemini表面活性剂的合成及表征

Synthesis and Characterization of Carboxylate Gemini Surfactant

以脂肪胺、三聚氯氰、二乙醇胺、丁二酸酐为原料,三步法合成了2种表面活性剂,用1 HNMR、ESI-MS、IR对产物进行了表征,并用吊片法考察了目标产物水溶液的表面活性。实验结果表明,目标产物具有较好的表面活性,25℃时DXC6A和DXC8A的最低表面张力(γCMC)分别为31.85mN/m和28.76mN/m,临界胶束浓度(CMC)分别为2.32×10-4 mol/L和1.41×10-5 mol/L,表面活性优于传统表面活性剂十二烷基硫酸钠(SDS)。

To prepare a series of Gemini surfactants by the nucleophilic substitution reactions of hexan-l-amine 1-oc- tylamine, diethano/amine, succinic anhydride and 2,4,6 - trichloro - 1,3,5 - triazine. To characterize the structure of product by 1HNMR,ESI-MS and IR. The aqueous solution of surfactant of the target product was measured by hanging plate method. As a result,the lowest surface tension （TOMe） of DXC6A and DXC8 were 31.85 mN/m and 28.76 mN/m,and its critical miceile concentration （CMC） were 2.32 ×10-4 mol/L and 1 . 41 ×10-5mol/L at 25 ℃. The Gemini surfactant compared with the traditional surfactant sodium dodecyl sulfate（SDS） has better surface activity.