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首页> 外文期刊>RSC Advances >Viscoelastic properties of supramolecular gemini-like surfactant solutions in the absence of inorganic salts
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Viscoelastic properties of supramolecular gemini-like surfactant solutions in the absence of inorganic salts

机译：在没有无机盐的情况下，超分子类双子表面活性剂溶液的粘弹性

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Exploration of novel wormlike micelle systems is important for both the theory and applications of surfactant self-assembly. A new anionic surfactant, sodium 2-phenoxyhexadecanoate (sodium Ph-C16), was synthesized in this work. This surfactant can self-assemble in solution to form wormlike micelles with the help of a bolaform salt, ethane-1,2-bis(trimethyl ammonium bromide) (N-2-N bromide), by removing inorganic salts. The resultant aqueous system was investigated using rheological measurements, freeze-fractured-TEM and 2D NOESY 1H NMR experiments. A supramolecular gemini-like structure constructed from electrostatic interactions was a prerequisite for the wormlike micelle formation. The zero shear viscosity (η0) of the system had a very strong dependence on the surfactant concentration with a scaling exponent of 16.8 in the semi-dilute region, which is attributed to the extremely strong electrostatic attraction between the surface-active anions and bolaform cations. These results are beneficial for understanding anionic wormlike micelles in the absence of inorganic salts.
机译：探索新型蠕虫状胶束系统对于表面活性剂自组装的理论和应用都非常重要。在这项工作中，合成了一种新的阴离子表面活性剂2-苯氧基十六烷酸钠（Ph-C16钠）。该表面活性剂可在溶液中自组装形成蠕虫状胶束，借助硼酸盐，乙烷-1，2-双（三甲基溴化铵）（N-2-N溴化物）去除无机盐。使用流变学测量，冷冻断裂TEM和2D NOESY 1 H NMR实验研究所得的水性体系。由静电相互作用构造的超分子双子座状结构是形成蠕虫状胶束的前提。系统的零剪切粘度（η 0 ）对表面活性剂的浓度有很强的依赖性，半表面的结垢指数为16.8。 -稀区域，这归因于表面活性阴离子与硼酸根阳离子之间的极强静电吸引。这些结果对于在不存在无机盐的情况下理解阴离子蠕虫状胶束是有益的。

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