ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A model is presented for the adsorption of water by ions in a deformable matrix. Only two opposing “effects” are included. The first is the mechanical resistance of the matrix to deformation which is treated within the framework of linear elasticity extended to the case of large deformations. The other effect is of electrical origin which is shown to be much more important than the purely entropic osmotic pressure. In the model only one immobile ion located at the center of a spherical droplet of water is considered. It is shown that the result does not significantly depend upon the dielectric constant of water, provided it is much larger than that of the matrix. The thermodynamic relations reveal that in fact most of the properties of the system depend mostly on the dielectric and elastic coefficients of the matrix. This simplified model should be considered as a guide for the understanding of the behavior of such systems rather than as a precise description of real materials. Some quantitative comparisons are made with a few experimental results.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1983.180211110
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