HIGHLY SWOLLEN GELS OF SEMIFLEXIBLE POLYELECTROLYTE CHAINS NEAR THE ROD LIMIT

被引：14

作者：

BARENBRUG, TMAOM

SMIT, JAM

BEDEAUX, D

机构：

[1] Department of Physical and Macromolecular Chemistry, Gorlaeus Laboratories, 2300 RA Leiden

来源：

POLYMER GELS AND NETWORKS | 1995年 / 3卷 / 03期

关键词：

D O I：

10.1016/0966-7822(94)00002-O

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this paper, analytical expressions are derived that describe the swelling behaviour and elastic properties of highly swollen permanent networks, consisting of rodlike, charged macromolecules with hexa-functional chemical crosslinks, ordered in a regular, cubic arrangement. The polyelectrolyte chains are semi-flexible; only semi-circular bending modes of the chains are taken into account. The equilibrium swelling volume and the elastic properties of these simple hydrogel models are calculated as a function of the ionic strength of the electrolyte solution surrounding the gel, and of the external pressure exerted on the gel. Counterion condensation and Donnan exclusion of salt are taken into account, following the description of Manning. The results show the correct trends, without the strong initial shrinking and complete collapse upon immersion in salt solutions, as predicted by gel models employing chains with Gaussian behaviour. Semi-quantitative agreement with experimental data for swelling phenomena is found.

引用

页码：331 / 373

页数：43

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[3]

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