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首页> 外文期刊>Arabian Journal for Science and Engineering >Effect of Micelle Structure on the Viscosity of Sulfonate Gemini Surfactant Solution
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Effect of Micelle Structure on the Viscosity of Sulfonate Gemini Surfactant Solution

机译：胶束结构对磺酸盐双子表面活性剂溶液粘度的影响

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In order to optimize the thickening performance of clean fracturing fluid, a series of sulfonate Gemini surfactants (DSm-s-m) were synthesized and identified by FTIR, (HNMR)-H-1, and (CNMR)-C-13. The surface tension curve was obtained by testing the surface tension of the surfactant at different concentrations, and the viscosity of sulfonate Gemini surfactant solution was measured by rheometer and investigated through changing the molecular structure. The microstructures of the solution were studied by SEM. The experimental results indicated that the CMC of the surfactant decreased with increasing the length of the hydrophobic chain. Moreover, the viscosity of sulfonate Gemini surfactant changed with the carbon number (s or m) of spacer group and hydrophobic chain, and the DS18-3-18 had superior viscosity behavior. The viscosity of the DS18-3-18 solution decreased with the temperature increase but was still 13.25 mPa center dot s at 90 degrees C. The microstructures of DS18-s-18 solution demonstrated that the micelles of the DS18-s-18 solution changed from spherical to layer like and finally to commixture of spherical/layer like with increasing the carbon number of spacer group (s = 2, 3, 4), and the viscosity of the solution increased firstly and then decreased correspondingly. The number of sheet micelles and bulk density in DS18-3-18 solution decreased with the increase of temperature, causing the decrease of the viscosity in solution. However, the intact sheet micelles still existing in solution at 90 degrees C meant that the DS18-3-18 had prominent temperature-resistant viscosity behavior. These phenomena illustrated that changing the molecular structure of surfactants could cause changes in their microstructure and finally lead to a change in the viscosity of the solution.
机译：为了优化清洁压裂液的增稠性能，合成了一系列磺酸盐双子表面活性剂（DSm-s-m），并通过FTIR，（HNMR）-H-1和（CNMR）-C-13进行了鉴定。通过测试不同浓度的表面活性剂的表面张力得到表面张力曲线，并通过流变仪测量磺酸盐双子表面活性剂溶液的粘度，并通过改变分子结构进行研究。通过SEM研究溶液的微观结构。实验结果表明，表面活性剂的CMC随疏水链长度的增加而降低。此外，磺酸盐双子表面活性剂的粘度随间隔基和疏水链的碳数（s或m）而变化，并且DS18-3-18具有优异的粘度性能。 DS18-3-18溶液的粘度随温度的升高而降低，但在90摄氏度时仍为13.25 mPa中心点。DS18-s-18溶液的微观结构表明，DS18-s-18溶液的胶束发生了变化。随着间隔基团碳原子数的增加（s = 2，3，4），从球形到层状，最后到球形/层状混合物，溶液的粘度先升高，然后降低。随着温度的升高，DS18-3-18溶液中的薄片胶束数量和堆积密度降低，从而导致溶液粘度降低。但是，完整的片状胶束仍在90摄氏度的溶液中存在，这意味着DS18-3-18具有突出的耐高温粘度性能。这些现象说明，改变表面活性剂的分子结构可能导致其微观结构发生变化，最终导致溶液粘度发生变化。

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