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Polyaniline/Carbon Nanotubes Composites: Kinetic Laws of Synthesis, Morphology and Properties

I.V. Gutnik, Tambov State Technical University, Tambov, Russia, T.P. Dyachkova, A.V. Rukhov, E.A. Burakova, E.N. Tugolukov, S.Yu. Alekseev, B.B. Kodirov, G.A. Titova, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia (+4 others)
2018 Advanced Materials & Technologies  

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The laws of oxidative aniline polymerization in the modification of multi-walled carbon nanotubes (CNT) with polyaniline (PANI) were studied. The effect of morphological features, type and method of CNT prefunctionalization on the temperature profile of the process and effective values of kinetic parameters and thermal effects was analyzed. The synthesized samples of PANI/CNT composites were studied by electron microscopy, Raman spectroscopy, thermogravimetry, and their specific surface area
more » ... electrical conductivity were determined. It was found that the maximum specific surface area S sp belongs to composites that contain carboxylated CNTs. At the same time, the increase in the degree of CNT prefunctionalization by COOH-groups leads to loosening of PANI modifying layer and increasing the specific surface of the material. The samples prepared by polyaniline deposition on the CNT surface with a low degree of prefunctionalization (0.2-0.4 mmol/g) were characterized by the minimum value of electrical resistivity. Based on the results of modeling the interaction of carboxylated CNTs with intermediate and end products of oxidative aniline polymerization using molecular dynamics methods, a hypothesis was formulated about the mechanism of modification by CNT polyaniline. It was shown that the initiation centers of PANI macromolecules growth were formed on the CNT surface, while the polymer chain growth occurred in the volume of the reaction mixture. Using the obtained experimental data, the operating parameters of PANI/CNT composite synthesis were calculated, recommendations on the choice of the main apparatus design were formulated, and a scheme of the experimental and industrial implementation of the process was proposed.
doi:10.17277/amt.2018.04.pp.054-068 fatcat:zj3a5zhhajd4vm3g37f2endnne
Citation

I.V. Gutnik, Tambov State Technical University, Tambov, Russia, T.P. Dyachkova, A.V. Rukhov, E.A. Burakova, E.N. Tugolukov, S.Yu. Alekseev, B.B. Kodirov, G.A. Titova, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia, Tambov State Technical University, Tambov, Russia. "Polyaniline/Carbon Nanotubes Composites: Kinetic Laws of Synthesis, Morphology and Properties." Advanced Materials & Technologies (2018) 054-068