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A. A. Konchyts, B. D. Shanina, I. B. Yanchuk, S. V. Krasnovyd
«EPR Diagnostics of Hemostyptics Based on Polysaccharides»
573–586 (2017)

PACS numbers: 61.82.Pv, 76.30.Rn, 82.35.Pq, 87.15.Pc, 87.53.Ay, 87.64.kh, 87.80.Lg

Two types of the paramagnetic defects, PC1 and PC2, induced due to breaking carbon bonds in the beta-irradiated biopolymer chitosan are found. The nature of defects, their parameters, and kinetics of the accumulation with increasing dose of the irradiation, D, are determined. The kinetic parameters of the process are estimated due to the comparison of experimental data with theoretical calculations. The effect of the self-healing material, namely, the decrease of the PC concentration with time after the irradiation, is revealed. As shown, the rates of processes depend on concentrations of the shallow and deep traps for electrons. The recovery processes in the chitosan samples with a more perfect crystallinity of a structure are much slower.

Key words: chitosan, chitin, paramagnetic centres.

https://doi.org/10.15407/nnn.15.03.0573

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