Title: Polymer-assisted forge-rolling disaggregation of detonation nanodiamonds and onion-like carbon

Authors: M.A. Kanygin; O.V. Sedelnikova; L.G. Bulusheva; A.V. Okotrub

Addresses: Nikolaev Institute of Inorganic Chemistry 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; National Research Tomsk State University 36 Lenina Ave., Tomsk 634050, Russia ' Nikolaev Institute of Inorganic Chemistry 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; National Research Tomsk State University 36 Lenina Ave., Tomsk 634050, Russia ' Nikolaev Institute of Inorganic Chemistry 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; National Research Tomsk State University 36 Lenina Ave., Tomsk 634050, Russia ' Nikolaev Institute of Inorganic Chemistry 3 Acad. Lavrentiev Ave., Novosibirsk 630090, Russia; National Research Tomsk State University 36 Lenina Ave., Tomsk 634050, Russia

Abstract: Nanodiamonds (NDs) produced in a detonation process are strongly aggregated, which hampers fully realising their properties at the nanoscale, particularly, in composites. Moreover, during annealing, the tightly bonded ND particles are transformed into the so-called onion-like carbon (OLC), where several carbon onions are coated by joint graphitic layers. Here, we demonstrate that NDs and OLC can be disaggregated using a polymer-assisted forge-rolling. The isolated diamond nanocrystals and carbon onions with a size of ∼5 nm typical for the primary particles are observed by high-resolution transmission electron microscopy in polystyrene films after repeated rolling. We suggest that forces acting on aggregates through a strongly stretched polymer matrix are able to break the chemical bonds between carbon particles. Measurements of permittivity indicate that homogeneous distribution of individualised carbon onions in polymers can significantly increase the shielding efficiency of a composite.

Keywords: polymer-assisted forge rolling; forge rolling disaggregation; detonation nanodiamonds; onion-like carbon; polymer composites; permittivity; nanomaterials; nanotechnology; diamond nanocrystals; shielding efficiency.

DOI: 10.1504/IJNT.2015.067203

International Journal of Nanotechnology, 2015 Vol.12 No.3/4, pp.182 - 191

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 28 Jan 2015 *

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