Gopmandal Partha P, Sinha R K, Ohshima H
Department of Mathematics, National Institute of Technology Patna, Patna-800005, India.
Department of Mathematics, National Institute of Technology Durgapur, Durgapur-713209, India.
Soft Matter. 2021 Feb 17. doi: 10.1039/d0sm02278k.
We propose a theoretical study on the electrophoresis of core-shell composite soft particles considering the effect of hydrodynamic slip length of the hydrophobic inner core. The surface of the inner core as well as the soft polymeric shell bear zwitterionic functional groups and the charged conditions depend on the nearby micro-environment. Within a low potential and weak electric field framework, the mathematical equations of the generalized electrokinetic theory for soft surfaces are solved analytically subject to appropriate boundary conditions, and a general electrophoretic mobility expression in an integral form involving the pH-dependent electrostatic potential is derived. With the help of suitable numerical schemes, electrophoretic mobility can easily be obtained. The effect of hydrophobicity of the inner core on the electrophoretic mobility of pH-regulated soft particles is illustrated for a wide range of pertinent parameters.
考虑到疏水内核流体动力学滑移长度的影响，我们提出了一项关于核壳复合软颗粒电泳的理论研究。内核表面以及软聚合物壳带有两性离子官能团，其带电情况取决于附近的微环境。在低电势和弱电场框架内，针对软表面的广义电动理论的数学方程在适当的边界条件下进行了解析求解，并推导出了一个包含pH依赖型静电势的积分形式的一般电泳迁移率表达式。借助合适的数值方案，可以轻松获得电泳迁移率。针对一系列相关参数，阐明了内核疏水性对pH调节软颗粒电泳迁移率的影响。
