Core-shell composite of SiCN and multiwalled carbon nanotubes from toluene dispersion

The method of preparation and various aspects of surface chemistry that distinguish the shell-core composite from its constituents have been reported. Carbon nanotubes are known to have high thermal conductivity, and in bulk form, a topology that could constitute the matrix of an inhomogeneous solid. The composite is formed in five stages: preparation of nanotube dispersion, incorporation of the polyureasilazane resin, mixing, drying, and then baking. X-ray diffraction (XRD) measurement results are consistent with material containing carbon nanotubes, without features of crystalline SiCN. Raman spectroscopy measurements were performed in the backscattering configuration by use of a 13 mW argon ion laser with a wavelength of 488 nm. Raman spectroscopy reveals that the composite is similar to previously reported material that shows evidence of SiCN and that is different from either SiCN or MWCNTs alone. The SiCN/MWCNT has an oxidation temperature that is approximately 50% higher than that which we measured for MWCNTs.