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Emergent slow dynamics of collapsed polymers flowing through porous media
Physical Review E ( IF 2.2 ) Pub Date : 2021-04-28 , DOI: 10.1103/physreve.103.l040501 Hsieh Chen , Martin E. Poitzsch
Physical Review E ( IF 2.2 ) Pub Date : 2021-04-28 , DOI: 10.1103/physreve.103.l040501 Hsieh Chen , Martin E. Poitzsch
Using hydrodynamic simulations, we study the single polymers flowing through model porous media (close-packed colloidal crystal). In good solvent or high flow rates, the polymer transport is similar to gel electrophoresis, with size-dependent sieving for and size-independent biased reptation for ( is the polymer contour length and is the diameter of colloids forming the porous media). Importantly, in bad solvent and low flow rates, the polymers show an extra window of size-dependent velocity for , where the polymer transport is controlled by a globule-stretch transition at pore throats, and the transport velocity is much slower than reptation.
中文翻译:
塌陷的聚合物流过多孔介质时出现的慢速动力学
使用流体动力学模拟,我们研究了流经模型多孔介质(密堆积胶体晶体)的单种聚合物。在良好的溶剂或高流速下,聚合物的传输类似于凝胶电泳,其中大小相关的筛分用于 和大小无关的偏见 ( 是聚合物轮廓长度, 是形成多孔介质的胶体直径)。重要的是,在不良溶剂和低流速下,聚合物对,其中聚合物的传输受孔喉处的小球-拉伸过渡控制,并且传输速度比复制慢得多。
更新日期:2021-04-29
中文翻译:
塌陷的聚合物流过多孔介质时出现的慢速动力学
使用流体动力学模拟,我们研究了流经模型多孔介质(密堆积胶体晶体)的单种聚合物。在良好的溶剂或高流速下,聚合物的传输类似于凝胶电泳,其中大小相关的筛分用于 和大小无关的偏见 ( 是聚合物轮廓长度, 是形成多孔介质的胶体直径)。重要的是,在不良溶剂和低流速下,聚合物对,其中聚合物的传输受孔喉处的小球-拉伸过渡控制,并且传输速度比复制慢得多。