Carbon-loaded porous composites produced by matrix carbonization of poly(vinylidene fluoride)

Using poly(vinylidene fluoride) (PVDF) carbonization at 750° C in fine-particle silica and its mixtures with graphite, we have prepared carbon-loaded porous composites which offer benzene absorption from 0.90 to 1.52 ml/g, compressive strength of 6 MPa, and Brinell hardness of up to 18 MPa. We obser...

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Bibliographic Details
Published in:Inorganic materials 2008-07, Vol.44 (7), p.697-704
Main Authors: Dubrovina, L. V., Ogenko, V. M., Naboka, O. V., Dymarchuk, V. O., Zaulychnyy, Ya. V., Khyzhun, O. Yu
Format: Article
Language:English
Subjects:
Carbon
Carbonization
Chemistry
Chemistry and Materials Science
Fluorides
Graphite
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Nanostructure
Polyvinylidene fluorides
Silicon dioxide
X-rays
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Summary:Using poly(vinylidene fluoride) (PVDF) carbonization at 750° C in fine-particle silica and its mixtures with graphite, we have prepared carbon-loaded porous composites which offer benzene absorption from 0.90 to 1.52 ml/g, compressive strength of 6 MPa, and Brinell hardness of up to 18 MPa. We observed the formation of various nanostructures (spheres, spherical segments, and layered platelets) and sizes (several to hundred nanometers). X-ray photoelectron and energy dispersive x-ray spectroscopy data indicate the presence of C-C, C =C, CO, COO, and CHF groups on the carbon surface. X-ray emission spectroscopy data show that the silica matrix composite prepared via PVDF carbonization contains small carbon clusters weakly bonded to the matrix. The silica/graphite matrix composite contains multilayer carbon films strongly bonded to the matrix. The O K α spectra of both composites are similar to the spectrum of pure SiO 2 .
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168508070054