Abstract Artificial polymeric additives are known, and experimentally proven, to be effective drag reducing agents in pipelines with turbulent flow medium. The artificial nature of these additives and their low resistance to high shear forces, exerted by the pipeline geometries and equipment, are considered as major problems against a wider implementation in other industrial applications. The present work introduces a new polymer-surfactant complex of two organic additives (chitosan and sodium laurel ether sulfate, SLES) as a drag reducing agent. The rheological and morphological properties of the new complexes were experimentally tested. The new complex’s drag reduction performance and stability against high shear forces were analyzed using rotating disk apparatus. All the investigated solutions and complexes showed a non-Newtonian behavior. The cryo-TEM images showed a unique polymer-surfactant macrocomplex structure with a nonlinear relationship between its rheological properties and surfactant concentration. A maximum flow enhancement of 47.75% was obtained by the complex (chitosan 300 and 400ppmof chitosan and SLES, respectively) at the rotation speed of 3000 rpm. Finally, the stability of the proposed additives was highly modified when the additive complexes were formed.

中文翻译：

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作为流动增强剂的生物聚合物-表面活性剂复合物：表征和性能评估

摘要 人工聚合物添加剂是已知的，并经过实验证明，是具有湍流介质的管道中的有效减阻剂。这些添加剂的人工性质及其对管道几何形状和设备施加的高剪切力的低阻力被认为是阻碍在其他工业应用中更广泛实施的主要问题。目前的工作介绍了一种由两种有机添加剂（壳聚糖和月桂醚硫酸钠，SLES）组成的新型聚合物-表面活性剂复合物作为减阻剂。通过实验测试了新配合物的流变学和形态学特性。使用转盘装置分析了新复合体的减阻性能和抗高剪切力的稳定性。所有研究的溶液和配合物都表现出非牛顿行为。低温 TEM 图像显示了一种独特的聚合物-表面活性剂大复合结构，其流变特性与表面活性剂浓度之间存在非线性关系。复合物（壳聚糖分别为 300 和 400 ppm 的壳聚糖和 SLES）在 3000 rpm 的转速下获得了 47.75% 的最大流动增强。最后，当添加剂复合物形成时，所提出的添加剂的稳定性得到了高度的改变。