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Journal Articles Soft Matter Year : 2016

Ion pairing controls rheological properties of “processionary” polyelectrolyte hydrogels

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.
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Dates and versions

hal-01526191 , version 1 (12-04-2022)

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Hassan Srour, Martien Duvall Deffo Ayagou, Thi Thanh-Tam Nguyen, Nicolas Taberlet, Sébastien Manneville, et al.. Ion pairing controls rheological properties of “processionary” polyelectrolyte hydrogels. Soft Matter, 2016, 12 (48), pp.9749 - 9758. ⟨10.1039/C6SM02022D⟩. ⟨hal-01526191⟩
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