Program and the Book of Abstracts (PDF) - Mrs-serbia.org.rs

Tenth Young Researchers Conference – Materials Science and Engineering
December 21-23, 2011, Hall 2, SASA, Knez Mihailova 35 & 36, Belgrade, Serbia
IX/7
Raman spectroscopy of gamma irradiated single wall carbon nanotubes
Svetlana Jovanović 1 , Zoran Marković 1 , Ivanka Holclajtner Antunović 2 ,
Biljana Todorović Marković 1
1 Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
2 Faculty of Physical Chemistry, University of Belgrade, Belgrade, Serbia
In this paper we present the effects of different dose and media of gamma irradiation on the
Raman spectra of metallic and semiconducting single wall carbon nanotubes (SWCNTs). SWCNTs
were subjected to doses of 25, 50 and 100 kGy in air, aqua ammonia and deionized water. Raman
spectra of all gamma irradiated SWCNTs were measured using two lasers, 532 and 780 nm
wavelengths. Results showed the structural disorder of SWCNTs increases with irradiation dose.
The most efficient debundling of SWCNTs was in the sample of SWCNTs irradiated in aqua
ammonia with 50 kGy.
IX/8
Electrospun PVB-SiO 2 composite fibers: morphology,
properties and ballistic applications
Vera Obradović 1 , Aleksandar Kojović 1 , Dušica B. Stojanović 1 , Nebojša D. Nikolić 2 ,
Irena Živković 1 , Petar S.Uskoković 1 , Radoslav Aleksić 1
1 Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
2 ICTM-Institute of Electrochemistry, University of Belgrade, Belgrade, Serbia
This research examined the PVB-SiO 2 composite micro- and nanofibers produced by the
electrospinning process. The experiments were carried out with the 10 wt.% PVB ethanol solution.
The silica nanoparticles, both modified and unmodified with AMEO silane, were added into the
solution in different contents of 1, 3 and 5 wt.% SiO 2 . For ballistic purposes, the unmodified silica
nanoparticles were put into the same solution with concentration of 50 wt.% SiO 2 . The aramid
fabrics were coated with this solution and the produced PVB-SiO 2 fibers were deposited on them.
The structures and properties of the PVB-SiO 2 composite fibers and aramid fabrics were
investigated by SEM microscopy, FTIR and DSC analysis.
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