Abstract
Abstract Present work is devoted to the spark plasma sintering (SPS) of multiwalled carbon nanotubes (MWCNTs), which was found to be an effective route to their compactisation. The products, obtained under different values of pressure (from 10 up to 22 MPa) and temperature (from 1000 up to 1800 оС), have been investigated by thermal analysis, SEM, HRTEM, Raman spectroscopy, X-Rays diffraction and low temperature nitrogen sorptometry as well as physical properties characterisation. It was found that the increase of temperature and pressure during SPS increased the density of the sintered samples and decreased their surface area. It is accompanied by appearance of the mesopores. Raman spectroscopy, TG and X-ray data show that the defectiveness of the CNTs decreased during SPS. Using a focused beam of the transmission electron microscope in-situ experimental simulation of the CNT consolidation and their crosslinking was successfully performed for the first time.
Published Version
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