Formation of carbon sp3 hybridization bonds in local electric fields of composites “polymer-CNT”

¹Department of Semiconductor Photonic Crystals, V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine,41 Prospect Nauki, Kyiv 03028, Ukraine

²China-Central and Eastern Europe International Science and Technology Achievement Transfer Center, Ningbo University of Technology, 201 Fenghua Road, Ningbo 315211, China

³Department of Nanoporous and Nanosized Carbon Materials, O. Chuiko Institute of Surface Chemistry, NAS of Ukraine, 17 General Naymov Street, Kyiv 03164, Ukraine

Adv. Mater. Lett., 2018, 9 (4), pp 296-300

DOI: 10.5185/amlett.2018.1964

Publication Date (Web): May 17, 2018

Copyright © IAAM-VBRI Press

E-mail: lakar@kartel.kiev.ua

Abstract

Carbon nanotubes are among the most anisotropic materials known and have extremely high values of Young's modulus. The possibilities to enhance the properties of nanostructured surfaces were demonstrated on “polymer-multiwall carbon nanotube” composites. Influence of sp³ hybridization bonds on polymer crystallization and strengthening was investigated in composite films of polyethyleneimine, polypropylene and polyamide with multiwall carbon nanotubes. It was established that the effective way to enhance the strength properties of “polymer-multiwall carbon nanotube” composites is the composite crystallization and sp³ C-C tetrahedrons organization between nanotubes supported by resonance γ_ω(C?)? and γ_ω(CH₂) vibrations in the intrinsic electric field 6×10³ V/cm between nanotube and polymer matrix. Tensile strength for polyamide-6 composites at 0.25% CNT increases 1.7 times and tensile deformation – 2.3 times.

Keywords

Polymer composites, multiwall carbon nanotubes, sp³ bonds, electric field.