Vol. 13, no.4, 2021
РусскийEnglish
NANOSYSTEMS
STRUCTURE AND ELECTRICAL CONDUCTIVITY OF POLYVINYL ALCOHOL FILMS WITH MULTI-WALLED CARBON NANOTUBES CURED IN A MAGNETIC FIELD
Sergey V. Vasin, Azat M. Nizametdinov, Viacheslav A. Sergeev
Kotelnikov Institute of Radioengineering and Electronics of RAS, Ulyanovsk branch, http://ulireran.ru/
Ulyanovsk 432071, Russian Federation
E-mail: vs0902@mail.ru, anizametdinov@yandex.ru, sva@ulstu.ru
Michael S. Efimov
Ulyanovsky State Technical University, https://www.ulstu.ru/
Ulyanovsk 432027, Russian Federation
E-mail: efimovmix@mail.ru
Received August 25, 2021, peer-reviewed September 10, 2021, accepted September 15, 2021
Abstract: The results of the study of the effect of the permanent magnetic field of a neodymium magnet on the polymerization process and the electrophysical characteristics of polyvinyl alcohol (PVA) films with the inclusion of multi-walled carbon nanotubes (MWCNTs) are presented. When studying the morphology of films using a scanning electron microscope, it was found that nanocomposite films with a thickness of 30 microns, cured in the presence of a magnetic field with the direction of the magnetic induction vector perpendicular to the surface of the films, have a homogeneous structure, while a significant number of MWCNTs agglomerations are observed in control samples of films. Measurements of the conductivity of films in the direction of the MWCNTs orientation at direct and alternating current showed that the conductivity of films obtained in a magnetic field significantly (by almost two orders of magnitude) exceeds the conductivity of control samples. The obtained results are analyzed on the basis of known models of electrical conductivity of nanocomposites with oriented MWCNTs. The degree of orientation of the MWCNTs during the curing of films in a magnetic field is estimated, taking into account the increase in the viscosity of the nanocomposite during the curing process.
Keywords: polymer nanocomposites, orientation of carbon nanotubes, magnetic field, nanocomposite films, electrical conductivity
UDC 678.744.72; 537.312.6
RENSIT, 2021, 13(4):457-464 DOI: 10.17725/rensit.2021.13.457.
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/413/13(4)457-464pdf