聚电解质水凝胶的静电、范德华和弹性相互作用

IF 2.9 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2023-12-13 DOI:10.1098/rspa.2023.0541
Reghan J. Hill
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引用次数: 0

摘要

根据 Debye-Hückel 近似法推导出了带电水凝胶与硬平面以及两个带电水凝胶之间的静电相互作用能。这与范德华势结合在一起,范德华势明确解决了溶剂介导的水凝胶相互作用的哈马克常数问题。然后,在德雅金近似中,为水凝胶和硬/刚性球提供了 DLVO 型相互作用势,并考虑到了伴随粘附而来的弹性变形。例如,这提供了软聚电解质微球的内聚能,并为硬质乳胶球粘附到软质可变形水凝胶提供了定量解释,如 Sato 等人的报告(Sato et al.该理论表明,水凝胶的弱范德华吸引力很容易被静电相互作用所平衡,例如,使胶体水凝胶分散体的稳定性低于其刚性颗粒对应物。
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Electrosteric, van der Waals and elastic interaction of polyelectrolyte hydrogels
The electrosteric interaction energy for a charged hydrogel and hard plane, and between two charged hydrogels is derived in the Debye–Hückel approximation. This is combined with a van der Waals potential that explicitly addresses the Hamaker constant for the solvent-mediated hydrogel interactions. Then, in the Derjaguin approximation, DLVO-type interaction potentials are provided for hydrogel and hard/rigid spheres, accounting for elastic deformation that accompanies adhesion. As examples, this furnishes the energy for cohesion of soft polyelectrolyte microspheres, and provides a quantitative interpretation for the adhesion of rigid latex spheres to a soft deformable hydrogel, as reported by Sato et al. (Sato et al. 2017 Sci. Rep. 7 , 1–10 ( doi:10.1038/s41598-017-06257-1 )). The theory demonstrates that weak van der Waals attraction of hydrogels is readily balanced by electrosteric interactions, e.g. making colloidal hydrogel dispersions less stable than their rigid-particulate counterparts.
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来源期刊
CiteScore
6.40
自引率
5.70%
发文量
227
审稿时长
3.0 months
期刊介绍: Proceedings A has an illustrious history of publishing pioneering and influential research articles across the entire range of the physical and mathematical sciences. These have included Maxwell"s electromagnetic theory, the Braggs" first account of X-ray crystallography, Dirac"s relativistic theory of the electron, and Watson and Crick"s detailed description of the structure of DNA.
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