Rheological behaviors of the aqueous solution of N-benzylacrylamide-modified partially hydrolyzed polyacrylamide in the presence of various surfactants are compared in this study. In addition to the electrostatic contribution, the steric factor of the surfactant molecules is found to play an important role in tuning the rheology of polymer solution presumably through diverse kinetics of mixed micelles composed of both surfactants and polymers. Specifically, it is speculated that faster micellar kinetics typical of smaller surfactant molecules allows the restructuring of micelles from intrapolymeric liaisons to interpolymeric ones when shear rate increases, giving rise to the unusual Newtonian and dilatant characteristics, while the impact of larger surfactant molecules is largely independent of the shear rate due to slower micellar kinetics. The possibility of the same polymer manifesting diverse rheological behaviors through fine-tuning added surfactants and associated micellar kinetics can be of great interests in applications such as enhanced oil recovery and painting formulation. Graphical abstract Graphical abstract

中文翻译：

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基于胶束动力学的疏水改性聚丙烯酰胺流变行为调节

本研究比较了N-苄基丙烯酰胺改性部分水解聚丙烯酰胺水溶液在各种表面活性剂存在下的流变行为。除了静电贡献之外，还发现表面活性剂分子的空间因子在调节聚合物溶液的流变学方面发挥重要作用，这可能是通过由表面活性剂和聚合物组成的混合胶束的不同动力学实现的。具体而言，据推测，当剪切速率增加时，较小表面活性剂分子典型的更快胶束动力学允许胶束从聚合物内的连接物重组为聚合物间的连接物，从而产生不寻常的牛顿和膨胀特性，而较大的表面活性剂分子的影响在很大程度上是独立的由于较慢的胶束动力学，剪切速率的变化。通过微调添加的表面活性剂和相关的胶束动力学，相同聚合物表现出不同流变行为的可能性在提高石油采收率和涂漆配方等应用中可能具有重要意义。图形摘要图形摘要