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Issue 48, 2016
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Ion pairing controls rheological properties of “processionary” polyelectrolyte hydrogels

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Abstract

We demonstrated recently that polyelectrolytes with cationic moieties along the chain and a single anionic head are able to form physical hydrogels due to the reversible nature of the head-to-body ionic bond. Here we generate a variety of such polyelectrolytes with various cationic moieties and counterion combinations starting from a common polymeric platform. We show that the rheological properties (shear modulus, critical strain) of the final hydrogels can be modulated over three orders of magnitude depending on the cation/anion pair. Our data fit remarkably well within a scaling model involving a supramolecular head-to-tail single file between cross-links, akin to the behaviour of pine-processionary caterpillar. This model allows the quantitative measure of the amount of counterion condensation from standard rheology procedure.

Graphical abstract: Ion pairing controls rheological properties of “processionary” polyelectrolyte hydrogels

  • This article is part of the themed collection: Polymers
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Publication details

The article was received on 02 Sep 2016, accepted on 16 Nov 2016 and first published on 17 Nov 2016


Article type: Paper
DOI: 10.1039/C6SM02022D
Citation: Soft Matter, 2016,12, 9749-9758
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    Ion pairing controls rheological properties of “processionary” polyelectrolyte hydrogels

    H. Srour, M. D. Deffo Ayagou, T. T. Nguyen, N. Taberlet, S. Manneville, C. Andraud, C. Monnereau and M. Leocmach, Soft Matter, 2016, 12, 9749
    DOI: 10.1039/C6SM02022D

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