Effect of core hydrophobicity on the electrophoresis of pH-regulated soft particles,Soft Matter

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Effect of core hydrophobicity on the electrophoresis of pH-regulated soft particles
Soft Matter ( IF 2.9 ) Pub Date : 2021-2-2 , DOI: 10.1039/d0sm02278k
Bharti ₁ , Partha P Gopmandal ₂ , R K Sinha ₁ , H Ohshima ₃

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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.

中文翻译：

核心疏水性对 pH 调节软颗粒电泳的影响

我们提出了考虑疏水内核流体动力滑移长度影响的核壳复合软颗粒电泳的理论研究。内核的表面以及柔软的聚合物壳带有两性离子官能团，带电条件取决于附近的微环境。在低电位和弱电场的框架内，在适当的边界条件下解析求解软表面广义动电理论的数学方程，并推导出涉及pH依赖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。通过广泛的相关参数说明了内核疏水性对 pH 调节软颗粒电泳迁移率的影响。

更新日期：2021-02-18

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