全氟丁基阳离子表面活性剂的合成与表面性能

摘要

A series of novel perfluorobutyl - type cationic surfactant have been successfully synthesized for the first time, employing perfluorobutyl sulfonyl fluoride and N, N - dimethylpropane - 1,3 - dimine as raw materials to produce perfluorobutyl sulfonylurea amide firstly, and followed by reacting with alkyl dibromide. The as - prepared surfactants have been characterized by 19F NMR, 1H NMR, MS and IR. By comparison, perfluorobutyl cationic surfactant with three alkyl chains demonstrates the highest activity with surface tension of the 21.25 mN/m under 25 ℃, and critical micelle concentration of 0. 002 g/L.%以全氟丁基磺酰氟与N，N’-二甲基-1，3-丙二胺为原料，合成全氟丁基磺酰胺，再与烷基二溴季铵盐化，首次成功得到了4种全氟丁基型阳离子表面活性剂，并通过19^FNMR、1^HNMR、MS和IR进行表征；结：果表明，该2-N-[3-（二甲基氨）-丙基]全氟丁基磺酰胺二溴丙烷季铵盐表面活性剂在25℃时的表面张力为21．25mN／m，临界胶束浓度为0．002g／L，表现出较高的表面活性。