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Nonadditivity of polymeric and charged surface interactions: Consequences for doped lamellar phases

Lookup NU author(s): Dr Otti CrozeORCiD

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Abstract

We explore theoretically the modifications to the interactions between charged surfaces across an ionic solution caused by the presence of dielectric polymers. Although the chains are neutral, the polymer physics and the electrostatics are coupled; the intrasurface electric fields polarize any low-permittivity species (e.g., polymer) dissolved in a high-permittivity solvent (e.g., water). This coupling enhances the polymer depletion from the surfaces and increases the screening of electrostatic interactions with respect to a model which treats polymeric and electrostatic effects as independent. As a result, the range of the ionic contribution to the osmotic interaction between surfaces is decreased while that of the polymeric contribution is increased. These changes modify the total interaction in a nonadditive manner. Building on the results for parallel surfaces, we investigate the effect of this coupling on the phase behavior of polymer-doped smectics. © 2005 American Chemical Society.

Publication metadata

Author(s): Croze OA, Gates ME

Publication type: Article

Publication status: Published

Journal: Langmuir

Year: 2005

Volume: 21

Issue: 12

Pages: 5627-5638

Print publication date: 01/06/2005

Online publication date: 05/05/2005

ISSN (print): 0006-3495

ISSN (electronic): 1542-0086

Publisher: American Chemical Society

URL: https://doi.org/10.1021/la0501738

DOI: 10.1021/la0501738

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