Herein, homogeneous solutions of cationic gemini surfactants, alkanediyl-α,ω-bis(dimethyldodecylammonium bromide), referred to as 12-s-12 where s = 2, 4, 6, 8, and 10, in cyclohexane have been prepared with the help of sodium hexanoate (SH) or sodium laurate (SL). These surfactants self-assembled in cyclohexane to form various aggregating structures, which were characterised by small-angle X-ray scattering (SAXS) together with polarised microscopy observations. The results showed that 12-2-12/SH, where the gemini had the shortest spacer among this series, formed an inverse micellar cubic liquid crystalline phase of the Fd3m structure. 12-s-12/SL, including s = 4, 6, and 8, which contained an adequate length spacer, formed an inverse hexagonal liquid crystalline phase packed by the cylindrical assemblies of surfactants. 12-10-12/SL, in which the gemini had a longer spacer, formed dispersed reverse vesicles (a lamellar structure). The rheological properties of liquid crystalline phases in a linear visco-elastic regime were studied. 12-2-12/SH formed a hard gel, whereas 12-s-12/SL formed soft gels. Dynamic light scattering and steady-state viscosity analyses were performed for the reverse vesicle solutions formed by 12-10-12/SL. In all these systems, the amount of added water W₀, denoting the mole ratio of water to the gemini surfactant, was demonstrated to influence the properties.

中文翻译：

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阳离子双子表面活性剂链烷二基双-（二甲基十二烷基溴化铵）在环己烷中的自组装：间隔物长度对其与反向溶致液晶或反向囊泡缔合的影响†

在此，已经用阳离子交换剂制备了阳离子双子表面活性剂，链烷二基-α，ω-双（二甲基十二烷基溴化铵）在环己烷中的均相溶液，称为12- s -12，其中s = 2、4、6、8和10。己酸钠（SH）或月桂酸钠（SL）的帮助。这些表面活性剂在环己烷中自组装形成各种聚集结构，其特征在于小角度X射线散射（SAXS）和偏振显微镜观察。结果表明，双子座中间隔物最短的12-2-12 / SH形成了Fd 3 m结构的逆胶束立方液晶相。12- s -12 / SL，包括s包含足够长度的间隔基的＝ 4、6和8，形成由表面活性剂的圆柱形组件填充的反六角形液晶相。12-10-12 / SL中双子座具有更长的间隔物，形成了分散的反​​向囊泡（层状结构）。研究了液晶相在线性粘弹性条件下的流变特性。12-2-12 / SH形成硬凝胶，而12- s -12 / SL形成软凝胶。对由12-10-12 / SL形成的反向囊泡溶液进行了动态光散射和稳态粘度分析。在所有这些系统中，表明水与双子表面活性剂的摩尔比的添加水量W ₀被证明会影响性能。