Cell Model Approaches for Predicting the Swelling and Mechanical Properties of Polyelectrolyte Gels
Cell Model Approaches for Predicting the Swelling and Mechanical Properties of Polyelectrolyte Gels
复制标题
预测聚电解质凝胶溶胀和机械性能的细胞模型方法
DOI:
10.1021/acs.macromol.9b01216
复制
发表时间:
2019
期刊:
影响因子:
5.5
通讯作者:
Christian Holm
中科院分区:
文献类型:
--
作者:
Jonas Landsgesell;Christian Holm
We present two successive mean-field approximations for describing the mechanical properties and the swelling equilibrium of polyelectrolyte gels in contact with a salt solution. The first mean-field approximation reduces the many-chain problem of a gel to a corresponding single-chain problem. The second mean-field step integrates out the degrees of freedom of the flexible chain and the ions. It replaces the particle-based description of the polyelectrolyte with suitable charge distributions and an effective elasticity term. These simplifications result in a computationally very efficient Poisson–Boltzmann cell-gel description. Despite their simplicity, the single-chain cell-gel model shows excellent and the PB model very good agreement with explicit molecular dynamics simulations of the reference periodic monodisperse network model for varying chain lengths, polymer charge fractions, and external reservoir salt concentrations. Comparisons of our models to the Katchalsky model reveal that our approach is superior for strongly charged chains and can also predict the bulk moduli more accurately. We further discuss chain length polydispersity effects, investigate changes in the solvent permittivity, and demonstrate the robustness of our approach to parameter variations coming from several modeling assumptions.
登录
查看更多内容
影响因子:
1
作者:
Alexey A. Gavrilov;A. Chertovich
通讯作者:
A. Chertovich
影响因子:
--
作者:
B. Mann;K. Kremer;Christian Holm
通讯作者:
Christian Holm
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
B. Mann;R. Everaers;Christian Holm;K. Kremer
通讯作者:
K. Kremer
影响因子:
5.5
作者:
Deserno, M;Holm, C;May, S
通讯作者:
May, S
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
M. Tehrani;Mohammad Hossein Moshaei;A. Sarvestani
通讯作者:
A. Sarvestani