Modeling Gel Swelling Equilibrium in the Mean Field: From Explicit to Poisson-Boltzmann Models.
Modeling Gel Swelling Equilibrium in the Mean Field: From Explicit to Poisson-Boltzmann Models.
复制标题
平均场中的凝胶溶胀平衡建模:从显式模型到泊松-玻尔兹曼模型
DOI:
10.1103/physrevlett.122.208002
复制
发表时间:
2019
影响因子:
8.6
通讯作者:
Christian Holm
中科院分区:
文献类型:
--
作者:
Jonas Landsgesell;David Sean;Patrick Kreissl;Kai Szuttor;Christian Holm
We develop a double mean-field theory for charged macrogels immersed in electrolyte solutions in the spirit of the cell model approach. We first demonstrate that the equilibrium sampling of a single explicit coarse-grained charged polymer in a cell yields accurate predictions of the swelling equilibrium if the geometry is suitably chosen and all pressure contributions have been incorporated accurately. We then replace the explicit flexible chain by a suitably modeled penetrable charged rod that allows us to compute all pressure terms within the Poisson-Boltzmann approximation. This model, albeit computationally cheap, yields excellent predictions of swelling equilibria under varying chain length, polymer charge fraction, and external reservoir salt concentrations when compared to coarse-grained molecular dynamics simulations of charged macrogels. We present an extension of the model to the experimentally relevant cases of-sensitive gels.
登录
查看更多内容
影响因子:
--
作者:
B. Mann;K. Kremer;Christian Holm
通讯作者:
Christian Holm
影响因子:
5.5
作者:
Deserno, M;Holm, C;May, S
通讯作者:
May, S
影响因子:
2
作者:
NINHAM, BW;PARSEGIAN, VA
通讯作者:
PARSEGIAN, VA
影响因子:
2.8
作者:
Weik, Florian;Weeber, Rudolf;Holm, Christian
通讯作者:
Holm, Christian
影响因子:
2.4
作者:
E. Trizac;J. Hansen
通讯作者:
J. Hansen