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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Rheological Behavior of Environmentally Friendly Viscoelastic Solutions Formed by a Rosin-Based Anionic Surfactant
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Rheological Behavior of Environmentally Friendly Viscoelastic Solutions Formed by a Rosin-Based Anionic Surfactant

机译：基于松香基阴离子表面活性剂形成的环保粘弹性溶液的流变学行为

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摘要

It is of great significance to explore novel applications of renewable resources. In this study, a rosin-based anionic surfactant (abbreviated R-11-2-Na), which contains a large hydrophobic group of 30 carbon atoms, was synthesized. R-11-2-Na forms wormlike micelles in the presence of the equimolar organic salt choline chloride, endowing solutions with strong viscoelasticity. The wormlike micellar solutions were investigated using rheology, small-angle X-ray scattering, and freeze-fracture transmission electron microscopy (FF-TEM) methods at 25 degrees C. Due to the strong van der Waals interactions caused by the large hydrophobic group contained in R-11-2-Na, the zero-shear viscosity (eta(0)) of solutions showed extremely strong dependence on the concentration with an exponent of 23.4. The cross-sectional diameter of the wormlike micelles in the present system was significantly larger than that of the wormlike micelles formed by surfactants containing conventional alkyl tails. This finding may be attributed to the steric hindrance brought by the bulky and rigid dehydroabietic acid unit in the hydrophobic part. The wormlike micelles also showed high tolerance to the organic salt concentration. The present study reveals the notable qualities of rosin-based derivatives in forming complex fluids and facilitates new utilizations of forest resources.
机译：探索可再生资源的新应用是具有重要意义。在该研究中，合成了一种基于松香的阴离子表面活性剂（缩写R-11-2-Na），其含有大疏水基团的30个碳原子。 R-11-2-Na在等摩尔有机盐胆碱存在下形成蠕虫状胶束，赋予具有强粘弹性的耐溶液。使用流变学，小角X射线散射和冷冻骨折透射电子显微镜（FF-TEM）方法研究了蠕虫状胶束溶液在25摄氏度下。由于由包含的大型疏水基团引起的强大的范德华相互作用在R-11-2-Na中，溶液的零剪切粘度（ETA（0））显示出极强的依赖性对23.4指数的浓度。本系统中蜗杆胶束的横截面直径显着大于含有常规烷基尾部的表面活性剂形成的蜗杆状胶束的横截面直径。该发现可能归因于疏水部件中笨重和刚性脱氢酸单元带来的空间障碍。蠕虫状胶束还显示出对有机盐浓度的高耐受性。本研究揭示了基于松香基衍生物在形成复杂的流体中的显着质量，并促进了森林资源的新利用。

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