Abstract
Scanning and transmission electron microscopy and dynamic rheology are used to thoroughly characterize the morphology and mechanical properties of bionanocomposite hydrogel prepared by mixing cationic chitosan with negatively charged particles of a synthetic clay (saponite) followed by gradual increasing of the charge of chitosan macromolecules by decreasing the pH of a medium. Gelation of the system is found to be due to the formation of a fibrillar three-dimensional network structure. It is shown that the size fibrils, the density of the network structure, and its mechanical properties are determined by the concentration ratio between the polysaccharide and saponite particles.
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Original Russian Text © Yu.A. Shchipunov, V.E. Silant’ev, I.V. Postnova, 2012, published in Kolloidnyi Zhurnal, 2012, Vol. 74, No. 5, pp. 654–662.
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Shchipunov, Y.A., Silant’ev, V.E. & Postnova, I.V. Self-organization in the chitosan-clay nanoparticles system regulated through polysaccharide macromolecule charging. 1. Hydrogels. Colloid J 74, 627–635 (2012). https://doi.org/10.1134/S1061933X12050092
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DOI: https://doi.org/10.1134/S1061933X12050092