论文标题
离子分配对两个带电软表面之间静电相互作用的效果
Ion partitioning effect on the electrostatic interaction between two charged soft surfaces
论文作者
论文摘要
从理论上讲，我们通过使用Poisson-boltzmann方法对离子分区进行了核算，从而在水溶液溶液中用移植的聚电解质层在两个带电的表面之间研究了静电性能。为了考虑离子分配效果，由于聚电解质层的介电介电常数和水性电解质溶液的介电介电常数差异，我们关注静电性能的变化。我们发现，离子分配增强了两个带电软表面之间该区域的静电电势，因此增加了两个带电软表面之间的静电相互作用。离子分配对渗透压的影响不仅可以增加聚电解质层和debye长度的厚度，而且还通过离子半径降低而增强。
We theoretically investigate electrostatic properties between two charged surfaces with a grafted polyelectrolyte layer in an aqueous electrolyte solution by using the Poisson-Boltzmann approach accounting for ion partitioning. In order to consider the ion partitioning effect, we focus on changes of electrostatic properties due to the difference in dielectric permittivity of the polyelectrolyte layer and the aqueous electrolyte solution. We find that ion partitioning enhances electrostatic potential in the region between two charged soft surfaces and hence increases the electrostatic interaction between two charged soft surfaces. Ion partitioning effect on osmotic pressure is enhanced not only by an increase in the thickness of polyelectrolyte layer and Debye length but also by a decrease in ion radius.
