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Modification of the structural parameters of coal tar pitch induced by addition of nanocarbon-coated iron at primary carbonization

I. ION1,2,* , A-M. BONDAR2, Y. KOVALEV1, C. BANCIU2, I. PASUK2

Affiliation

  1. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
  2. Carbon Materials Laboratory , National Institute for Research and Development in electrical engineering, 030138 Bucharest-3, Romania

Abstract

The carbon composite materials consisting of nanocarbon coated iron as additive, in different amount and coal tar pitch as matix, was carbonized at 440 oC with the purpose to obtain materials for electromagnetic interference shielding. The materials structure and the changing induced by addition of different amount of additive were studied by Small-Angle Neutron Scattering, Electron Microscopy. The structural mode proposed exhibit two structural levels characterized by basic structural units (BSU) and fractal clusters, respectively. BSU consist of two polyaromatic molecules piled up para lel to each other. The fractal properties of the clusters depend on the amount of the additive. The effect of additive is negligible to the first level and is strongly manifested at the second level, where the small differences in amount increase the roughness or change the fractal properties from surface to mass fractal..

Keywords

SANS, Carbon composite materials, Mesophase, BSU, Electromagnetic interference shielding.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

I. ION, A-M. BONDAR, Y. KOVALEV, C. BANCIU, I. PASUK, Modification of the structural parameters of coal tar pitch induced by addition of nanocarbon-coated iron at primary carbonization, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 624-630 (2006)