标题： 半稀释聚电解质溶液和复合凝聚物中的流体力学 显示英文标题

标题： Hydrodynamics in Semidilute Polyelectrolyte Solutions and Complex Coacervates

摘要： 通常认为，在密集的聚电解质（PE）溶液中，如半稀释PE溶液和PE复合凝聚物，流体力学效应被强烈屏蔽且无关紧要。 在这里，我们使用考虑流体力学的介观分子动力学模拟，表明在亚扩散区域中的链段动力学显示出强烈的流体动力学相互作用的特征，这些特征远远超出具有中等短链的半稀释PE溶液的相关长度。 在含有中等短链的凝聚物系统中也观察到了强烈的流体动力学效应，即使PE浓度高达$30\%$。 我们的工作填补了现有模拟文献中关于密集PE溶液的空白，并提示了流体力学在更广泛的聚合物/聚电解质溶液系统中的传输和流变性质中的重要性。 显示英文摘要

摘要： It is generally assumed that hydrodynamics in dense polyelectrolyte (PE) solutions, such as semidilute PE solutions and PE complex coacervates, is heavily screened and inconsequential. Here, using mesoscale molecular dynamics that explicitly accounts for hydrodynamics, we show that segmental dynamics in the subdiffusive regime show strong signatures of hydrodynamic interactions that persist well beyond the correlation length of semidilute PE solutions with moderately short chains. The strong hydrodynamic effects are also observed in coacervate systems containing moderately short chains, even with PE concentration as high as $30\%$. Our work fills a gap in the existing simulation literature on dense PE solutions and hints at the importance of hydrodynamics in the transport and rheological properties in broader polymer/polyelectrolyte solution systems.