Wormlike Micelles and Solution Properties of a C22-Tailed Amidosulfobetaine Surfactant
Wormlike Micelles and Solution Properties of a C22-Tailed Amidosulfobetaine Surfactant
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DOI：
10.1021/la904582w
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发表时间：
2010-06-01
期刊：
影响因子：
3.9
通讯作者：
Han, Yixiu
中科院分区：
文献类型：
--
作者：
Chu, Zonglin;Feng, Yujun;Han, Yixiu
蠕虫状胶束已被观察到，并解释了各种不同类型的表面活性剂除了磺基甜菜碱的。在这里，我们首次报告了由C22-尾酰胺基磺基甜菜碱表面活性剂-3-（N-芥酸酰胺丙基-N，N-二甲基铵）丙烷磺酸盐（EDAS）形成的分支蠕虫。在半稀释区增加EDAS浓度，粘度增加几个数量级，并形成缠结和分支蠕虫的粘弹性胶束溶液。通过流变学方法和Cryo-TEM观察证实了胶束间的支化。此外，流变学实验表明，EDAS蠕虫具有重叠浓度低、对无机盐不敏感、在整个pH范围内稳定等优点。
Wormlike micelles have been observed and explained in a wide variety of different types of surfactants except sulfobetaine ones. Here, we first report branched worms formed by a C22-tailed amidosulfobetaine surfactant-3-(N-erucamidopropyl-N,N-dimethyl ammonium) propane sulfonate (EDAS). Increasing EDAS concentration in the semidilute region increases the viscosity by several orders of magnitude and forms viscoelastic micellar solution of entangled and branched worms. The intermicellar branching is proved by rheological methods and Cryo-TEM observation. Besides, the rheological experiments indicate that EDAS worms show some advantages such as low overlapping concentration, insensitive to inorganic salt, stable over the whole pH range.