Synthesis and Surface Active Properties of a Gemini Imidazoline Amphoteric Surfactant
作者:Yuanhong Xu、Hujun Xu
DOI:10.1007/s11743-016-1841-8
日期:2016.9
which we controlled the pH between 8 and 9 and the temperature between 80 and 90 °C to prepare C12‐bis‐imi. The air–liquid surface tension was measured by a tensiometer at 298 ± 0.1 K. The results show that the critical micelle concentration (CMC) was 2.25 × 10−3 mol/L and the surface tension at the CMC (γCMC) was 30.42 mN/m. C12‐bis‐imi showed a synergistic effect in combination with lauric alcohol with
分两步制备双子氨基咪唑啉两性表面活性剂。我们首先使月桂酸与三亚乙基四胺反应,获得了称为双烷基双咪唑啉的中间体。我们通过1 H NMR对其进行分析,根据高氯酸非水滴定法,产率为82.45%。然后在异丙醇和水的混合物中使用2-氯乙烷磺酸钠对中间体进行季铵化,在此期间,我们将pH值控制在8至9之间,温度控制在80至90°C之间,以制备C12-bis-imi。空气-液体表面张力是由张力计在298个±0.1 K.结果测量表明,临界胶束浓度(CMC)为2.25×10 -3摩尔/ L和在CMC的表面张力(γ CMC)为30.42 mN / m。C12-bis-imi与具有9个环氧乙烷基团(AEO9)的月桂醇结合显示协同作用。协同作用是最显着的,当C12双- IMI的摩尔比/ AEO9为1/1,且相应的CMC为9.79×10 -5摩尔/ L和γ CMC为37.61 mN / m的。