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-  2017 

烯基联接链、杂环头基季铵盐Gemini表面活性剂的合成及性质 Synthesis and Properties of the Gemini Surfactants with Alkenyl Spacer and Heterocyclic Head-Groups

Keywords: Gemini表面活性剂,杂环头基,烯基联接链

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Abstract:

以吡啶烷/哌啶、长链溴代烷和反式-1,4-二溴-2-丁烯为原料,合成了8种含烯基联接链、杂环头基的季铵盐Gemini表面活性剂py-en-n和pi-en-n(py代表头基为吡咯烷基,pi代表头基为哌啶基,en代表联接链为2-丁烯基,n代表尾链碳数(其中n=10,12,14,16)),并分析了它们的表面活性和聚集体形态.结果显示,两个系列Gemini表面活性剂的临界胶束浓度(cmc)值比单链表面活性剂低1~2个数量级,且均随尾链、头基碳数的增加而降低;经与文献对比,其cmc值由低到高依次为:py-an-n,py-en-n,py-yn-n(an代表联接链为丁基,yn代表联接链为2-丁炔基);此外,尾链长度为16的py-en-16和pi-en-16在水溶液中有预胶束形成;合成的8种Gemini表面活性剂在浓度为10cmc时均有囊泡形成

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