Physical science of materials

Effect of nanotubes on the electrical and mechanical properties of chitosan films

A. M. Kamalov^a, V. V. Kodolova-Chukhontseva^a, E. N. Dresvyanina^ab, T. P. Maslennikova^c, I. P. Dobrovol'skaya^ad, E. M. Ivan'kova^d, E. N. Popova^d, V. E. Smirnova^d, V. E. Yudin<sup>ad

a</sup> Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
^b St. Petersburg State University of Technology and Design, 191186 St. Petersburg, Russia
^c I. V. Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences, 199034 Saint-Petersburg, Russia
^d Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia

Abstract: Using the methods of X-ray diffraction and scanning electron microscopy, the structure of composite films based on chitosan and single-wall carbon tubes has been studied. It is shown that the introduction of carbon nanotubes leads to the ordering of the chitosan structure. Increase in concentration of nanotubes (from 0 to 3%) causes rise in the value of storage modulus from 3 to 4 GPa (DMA data), increase in electrical conductivity of samples (from 10$^{-11}$ to 10$^2$ S/m), and some changes in their dielectric permittivity (from 5.5. to 26 at an electrical field frequency of 1 kHz). Data on the ionic and electronic components of the conductivity of the composite film are presented. Keywords: chitosan, electrical conductivity, nanotubes, dielectric constant, composite.

Keywords: chitosan, electrical conductivity, nanotubes, dielectric constant, composite.

Received: 14.10.2021
Revised: 22.11.2021
Accepted: 23.11.2021

DOI: 10.21883/JTF.2022.03.52138.278-21

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