琥珀酸磺酸盐双子表面活性剂的合成及性能

Synthesis and Properties of Succinic Sulfonate Gemini Surfactant

以顺丁烯二酸酐、正辛醇、乙二醇和亚硫酸氢钠为主要原料,经单酯化、双酯化、磺化反应合成了一种Gemi-ni双子表面活性剂——乙二醇双琥珀酸双辛酯磺酸钠。通过正交实验以及单因素实验确定最佳合成工艺条件为:单酯化反应,n(正辛醇)∶n(顺丁烯二酸酐)=1.00∶1.05,反应温度90℃,反应时间2h;双酯化反应,n(单酯)∶n(乙二醇)=2.05∶1.00,反应温度100℃,催化剂对甲苯磺酸用量1.0%,反应时间3h;磺化反应,n(双酯)∶n(亚硫酸氢钠)=1.00∶2.05,反应温度85℃,反应时间90min。利用红外光谱对反应中间体和产物进行了表征。产物的CMC为5.0×10-4 mol.L-1,表面张力γCMC为37.98mN.m-1。

With maleic anhydride,n-octanol, ethylene glycol and NaHSO3 as the main raw materials, a new Gemini surfactant--ethylene glycol succinate octyl sulfonate sodium was synthesized through monoesterifica- tion,diesterification and sulfonation. The optimum conditions were obtained by orthogonal experiments and single factor experiments. Monoesterification was carried out at 90 ℃ for 2 h,with n（n-octanol） ： n（maleic anhydride） = 1.00 ： 1.05. Diesterification was carried out at 100 ℃ for 3 h,with n（monoester） ： n（ethylene glycol） =2.05 ： 1.00 and 1.0% toluene-p-sulfonic acid. Sulfonation was carried out at 85 ℃ for 90 rain,with n（diester） ： n（NaHSO3 ）= 1.00 ： 2.05. The structure of each compound was identified by IR. The CMC of the final product was 5.0×10^-4mol · L^-1 and its surface tension was 37.98 mN · m^-1.