Abstract
Composite fibers based on chitosan coated with a conductive polymer polypyrrole (PPy) have been obtained. Their morphology was studied by scanning electron microscopy. The electrical conductivity of the fibers in the dry state and in a liquid culture medium simulating tissue fluid was evaluated. The values of resistivity ρ and conductivity σ of the studied fibers are determined depending on the number of PPy layers, the drawing ratio (orientation) of the fibers in a dry and liquid medium. It has been established that, with an increase in the spin draw from 0 to 100%, resistivity ρ of the fibers decreases (and conductivity σ increases) both in the dry state and in the liquid culture medium. In this case, the maximum drop in resistivity ρ of fibers upon immersion in a liquid culture medium was observed for unstretched fibers with two layers of PPy. It is shown that, after the initial fall of resistivity ρ, oriented chitosan fibers with one and two layers of PPy, resistivity ρ changes slightly in a liquid culture medium for 2 h. The studied oriented polymer fibers of chitosan coated with one and two layers of PPy are promising for use in the field of tissue engineering and regenerative medicine.
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ACKNOWLEDGMENTS
This work was supported by the Russian Science Foundation, grant no. 19-73-30003.
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Translated by M. Drozdova
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Aleshin, P.A., Aleshin, A.N., Rozova, E.Y. et al. A Study of the Electrophysical Properties of Composite Fibers Based on Chitosan and Polypyrrole for Tissue Engineering. Tech. Phys. 67, 41–47 (2022). https://doi.org/10.1134/S1063784222010017
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DOI: https://doi.org/10.1134/S1063784222010017