Radiation Functionalization of Polyethylene Glycol Films with Multiwall Carbon Nanotubes

Authors М.А. Alieksandrov1, Т.М. Pinchuk-Rugal1, О.P. Dmytrenko1, М.P. Kulish1, А.І. Misiura1, А.М. Gaponov1, V.М. Popruzhko1, V.V. Shlapatska2

1Taras Shevchenko National University of Kyiv, 64, Volodymyrska St., 01033 Kyiv, Ukraine

2L.V. Pisarzhevski Institute of Physical Chemistry, NAS, 31, pr. Nauki, 03028 Kyiv, Ukraine

Е-mail mrmarafon@gmail.com
Issue Volume 13, Year 2021, Number 5
Dates Received 16 August 2020; revised manuscript received 20 October 2021; published online 25 October 2021
Citation М.А. Alieksandrov, Т.М. Pinchuk-Rugal, О.P. Dmytrenko, et al., J. Nano- Electron. Phys. 13 No 5, 05029 (2021)
DOI https://doi.org/10.21272/jnep.13(5).05029
PACS Number(s) 72.80. – r,73.63.Fg
Keywords Polyethylene glycol, Carbon nanotubes (14) , Percolation, Optical density, Electron irradiation (2) .

The structure, electrical conductivity and optical absorption of polyethylene glycol (PEG) films with multiwall carbon nanotubes (MwNT) in the initial state and after radiation functionalization by means of high-energy electron irradiation (Ee  1.8 MeV) with absorption doses of 10 and 30 MRad were studied. The structure was studied by XRD method and optical microscope. It is shown that electron irradiation significantly affects the behavior of the percolation curve. Even at an absorption dose of 10 MRad, the percolation threshold increases by almost an order of magnitude due to the formation of a network structure in the polymer matrix as a consequence of crosslinking of macromolecules. A low percolation threshold was obtained for film samples of PEG with MwNT. Two theories were used to construct the percolation curve. Fitting the experimental data for the σc/σm ratio shows an increase in the value of φc with a rise in the absorption dose, which is consistent with the scaling approximation. Changes in the optical density spectra with increasing concentration of MwNT in the PEG matrix before and after radiation functionalization by means of high-energy electron irradiation are shown. Radiation exposure has a complex effect on the structure and properties of polymer composites and can generate various defects in carbon nanotubes. The complex behavior of the optical absorption spectrum is due to the appearance of absorption features associated with the presence of singularities in carbon nanotubes.

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