School of Chemical Engineering and Environment, North University of China, Taiyuan, Shanxi 030051, People's Republic of China.
J Colloid Interface Sci. 2010 Oct 15;350(2):480-5. doi: 10.1016/j.jcis.2010.06.050. Epub 2010 Jun 23.
This study describes the synthesis of three novel anionic gemini surfactants via a convenient and easily controllable method, sodium 2,2'-(6,6'-(ethane-1,2-diylbis(azanediyl) bis(4-(octylamino)-1,3,5-triazine -6,2-diyl) bis(azanediyl)diethanesulfonate (C(8)-2-C(8)), sodium 2,2'-(6,6'-(propane-1,3-diylbis(azanediyl) bis(4-(octylamino)-1,3,5-triazine-6,2-diyl) bis(azanediyl)diethanesulfonate (C(8)-3-C(8)), sodium 2,2'-(6,6'-(butane-1,4-diylbis(azanediyl) bis(4-(octylamino)-1,3,5-triazine-6,2-diyl) bis(azanediyl)diethanesulfonate (C(8)-4-C(8)). The interactions of these new anionic gemini surfactants with the conventional cationic cetyltrimethylammonium bromide (CTAB) are investigated in 0.1 mol/L NaCl aqueous solutions. The mixed systems are C(8)-2-C(8)/CTAB, C(8)-3-C(8)/CTAB, and C(8)-4-C(8)/CTAB, and the mole factions (alpha(G)) of C(8)-n-C(8) (n=2, 3, 4) were 0.5, 0.7, and 0.9 respectively. These mixtures exhibit synergism in both surface tension reduction effectiveness and surface tension reduction efficiency. When alpha(G)=0.5 the three systems exhibit synergism in mixed micelle formation, whereas the other surfactant mixtures do not show this synergism. The interactions in mixed adsorbed films are stronger than those involved in mixed micelles for all mixtures.
本研究通过一种简便且易于控制的方法合成了三种新型阴离子双子表面活性剂，即 2,2'-(6,6'-(乙烷-1,2-二基双(氮杂二基)双(4-(辛基氨基)-1,3,5-三嗪-6,2-二基)双(氮杂二基)二乙磺酸钠(C(8)-2-C(8))、2,2'-(6,6'-(丙烷-1,3-二基双(氮杂二基)双(4-(辛基氨基)-1,3,5-三嗪-6,2-二基)双(氮杂二基)二乙磺酸钠(C(8)-3-C(8))和 2,2'-(6,6'-(丁烷-1,4-二基双(氮杂二基)双(4-(辛基氨基)-1,3,5-三嗪-6,2-二基)双(氮杂二基)二乙磺酸钠(C(8)-4-C(8))。在 0.1mol/L NaCl 水溶液中研究了这些新型阴离子双子表面活性剂与常规阳离子十六烷基三甲基溴化铵（CTAB）的相互作用。混合体系为 C(8)-2-C(8)/CTAB、C(8)-3-C(8)/CTAB 和 C(8)-4-C(8)/CTAB，C(8)-n-C(8)（n=2、3、4）的摩尔分数（α(G)）分别为 0.5、0.7 和 0.9。这些混合物在降低表面张力的有效性和效率方面均表现出协同作用。当α(G)=0.5 时，三个体系在混合胶束形成方面表现出协同作用，而其他表面活性剂混合物则没有表现出这种协同作用。对于所有混合物，混合吸附膜中的相互作用比混合胶束中的相互作用更强。
