新型不对称季铵盐Gemini表面活性剂的合成及其表面活性

摘要

以溴代烷和N,N,N′,N′-四甲基乙二胺为原料,经过两步季铵化反应合成了一种新型的不对称型阳离子Gemini表面活性剂——二亚甲基-1-正己基二甲基溴化铵-2-十八烷基二甲基溴化铵(3),其结构经1H NMR和元素分析表征.研究结果表明,3的Krafft点为21.9℃,且聚集能力强.%A novel dissymmetric quaternary ammonium Gemini surfactant,dimethylene-1-hexyldime-thyl ammonium bromide-2-octadecyldimethyl ammonium bromide(3),was synthesized by a two-step quaternization reaction from bromoalkane and N,N,N',N'-tetramethylethylenediamine. The structures were characterized by 1H NMR and elemental analysis. Krafft of 3 was 21.9℃ and cumulated ability was strong.