Dynamic model of monovalent-divalent cation exchange in polyelectrolyte gels

被引：1

作者：

Mussel, Matan ^{[1
]}

Lewis, Owen ^{[2
]}

Basser, Peter J. ^{[3
]}

Horkay, Ferenc ^{[3
]}

机构：

[1] Univ Haifa, Dept Phys, IL-3498838 Haifa, Israel

[2] Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87106 USA

[3] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, NIH, Bethesda, MD 20892 USA

来源：

PHYSICAL REVIEW MATERIALS | 2022年 / 6卷 / 03期

关键词：

POLYACRYLATE HYDROGELS; OSMOTIC PROPERTIES; SODIUM; ADSORPTION; TRANSPORT; WATER;

D O I：

10.1103/PhysRevMaterials.6.035602

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A multicomponent model that imposes conservation laws and constitutive relations for polymer chains, water, and ions was investigated by determining the transient changes in a negatively charged gel exposed to a solution containing both mono- and divalent cations. Association of ion exchange with gel volume is achieved by imposing a linear relation between the polymer-solvent interaction parameter and concentration of divalent cations adsorbed onto the polymer chains. Semiquantitative agreement with measurements made on sodium polyacrylate gels is demonstrated in three aspects: (1) dynamics of gel swelling and deswelling, (2) ion partitioning coefficient, and (3) effect of cross-link density. These results imply that the multicomponent coarse-grained continuum modeling approach can be useful for quantitative predictions over macroscopic length and timescales including the description of volume transitions exhibited by these systems.

引用

页数：9

共 45 条

[21] Theory of volume transition in polyelectrolyte gels with charge regularization [J].