论文标题
通过增强强伸展理论研究的pH响应性聚电解质刷之间的结构和静电性能
Structural and electrostatic properties between pH-responsive polyelectrolyte brushes studied by augmented strong stretching theory
论文作者
论文摘要
在本文中，我们通过使用强大的拉伸理论来研究pH响应性聚电解质刷之间的静电和结构特性，这些理论占据了排除的体积相互作用，多电解质电解质收费位点的密度以及刷子内部和外部之间的诞生能量差。 在自由能框架中，我们获得了自洽场方程，以确定两个pH响应的聚电解质刷之间的静电性能。我们阐明，在两个pH响应性聚电解质刷之间的区域中，中心线的静电电位和渗透压不仅会随着排除体积相互作用而增加，而且还随着聚电解质分子上的可费解位点的密度而增加。 重要的是，我们澄清说，当两个pH响应性的聚电解质刷相互接近时，刷子的厚度变短，并且很大的排除体积相互作用和大密度的费用位点产生了增强的聚电解质刷合同。此外，我们还展示了pH，kuhn单体数量，带电位点的密度，相邻多电解质刷之间的横向分离，静电性和结构性能之间的横向分离的影响。 最后，我们研究了出生能量差对聚电解质刷厚度的影响以及两个pH响应性聚电解质刷之间的渗透压。
In this paper, we study electrostatic and structural properties between pH-responsive polyelectrolyte brushes by using a strong stretching theory accounting for excluded volume interactions, the density of polyelectrolyte chargeable sites and the Born energy difference between the inside and outside of the brush layer. In a free energy framework, we obtain self-consistent field equations to determine electrostatic properties between two pH-responsive polyelectrolyte brushes. We elucidate that in the region between two pH-responsive polyelectrolyte brushes, electrostatic potential at the centerline and osmotic pressure increase not only with excluded volume interaction, but also with density of chargeable sites on a polyelectrolyte molecule. Importantly, we clarify that when two pH-responsive polyelectrolyte brushes approach each other, the brush thickness becomes short and that a large excluded volume interaction and a large density of chargeable sites yield the enhanced contract of polyelectrolyte brushes. In addition, we also demonstrate how the influence of such quantities as pH, the number of Kuhn monomers, the density of charged sites, the lateral separation between adjacent polyelectrolyte brushes, Kuhn length on the electrostatic and structural properties between the two polyelectrolyte brushes is affected by the exclusion volume interaction. Finally, we investigate the influence of Born energy difference on the thickness of polyelectrolyte brushes and the osmotic pressure between two pH-responsive polyelectrolyte brushes.
