Article Dans Une Revue International Journal of Biological Macromolecules Année : 2007

Novel hyaluronan-based supramolecular assemblies stabilized by multivalent specific interactions: rheological behavior in aqueous solution

Résumé

The behavior in aqueous medium of new hyaluronic acid (HA) based supramolecular assemblies was fully investigated by rheological measurements. The physical networks studied are stabilized by specific interactions between (i) monomeric β-cyclodextrin (CD) and adamantane (AD) molecules or (ii) dimeric CD and AD molecules, each randomly grafted along the polysaccharide chain. The viscoelastic properties of the resulting "mono- and bi-sticker systems", in which inclusion complexes play the role of sticky point, were analyzed as a function of polymer concentration, temperature and addition of host competitive molecules. These networks were shown to exhibit a marked non-Maxwellian behavior. The mono- and bi-interchain complexes considerably slow down the global dynamic and are believed to involve unusual viscoelastic properties that clearly differ from those of alkylated HA-based systems. These rheological features could be explained by a special mechanism of association leading to the formation of networks constituted by double-chain strands connected by fourfold junction points.

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Dates et versions

hal-00372778 , version 1 (02-04-2009)

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  • HAL Id : hal-00372778 , version 1

Citer

Aurélia Charlot, Rachel Auzély-Velty. Novel hyaluronan-based supramolecular assemblies stabilized by multivalent specific interactions: rheological behavior in aqueous solution. International Journal of Biological Macromolecules, 2007, 40 (26), pp.9555-9563. ⟨hal-00372778⟩
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