Influence of polymer ionization degree on solute diffusion in polyelectrolyte gels

被引：25

作者：

Amsden, B ^{[1
]}

Grotheer, K ^{[1
]}

Angl, D ^{[1
]}

机构：

[1] Queens Univ, Dept Chem Engn, Kingston, ON K7L 3N6, Canada

来源：

MACROMOLECULES | 2002年 / 35卷 / 08期

关键词：

D O I：

10.1021/ma011708g

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The ability of an obstruction-scaling model of solute diffusion to account for solute diffusivity in polyelectrolyte gels composed of semiflexible chains is presented. The diffusion of FITC-dextran in poly(acrylic acid) gels was measured at different pH conditions to determine the effect of the ionization degree of the poly(acrylic acid) on the diffusivity of the FITC-dextran. The obstruction-scaling model, as well as a hydrodynamic-based model and a jumping frequency model, was applied to the data. It was determined through regression analysis that the obstruction-scaling approach provided a better fit and could effectively account for the observed effect of the variation in the ionization degree on solute diffusivity.

引用

页码：3179 / 3183

页数：5

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