Abstract
Effect of the oxidative destruction of chitosan on the rate at which a dispersed phase is formed in its dilute solutions in the presence of sulfate ions and on the composition, size and ζ-potential of submicrometer chitosan sulfate particles being formed was studied. It was found that the particle size steadily decreases as the molecular mass of chitosan becomes smaller, and the sedimentation stability of aqueous dispersions increases in the absence of surfactants. The \(\nu _{SO_4 } :\nu _{NH_2 }\) molar ratio in chitosan sulfate particles is independent of the molecular mass of chitosan and varies within the range 0.45–0.46. A pH-dependence of the sign of the ζ-potential with isoelectric point at pH 5.0 was found for particles based on destructed chitosan.
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Original Russian Text © E.A. Mezina, I.M. Lipatova, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 10, pp. 1390−1395.
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Mezina, E.A., Lipatova, I.M. Effect of peroxide depolymerization of chitosan on properties of chitosan sulfate particles produced from this substance. Russ J Appl Chem 88, 1576–1581 (2015). https://doi.org/10.1134/S1070427215100031
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DOI: https://doi.org/10.1134/S1070427215100031