سنتز نانولوله هاي كربني چند ديواره به روش مكانوترمال براي استفاده در نانوكامپوزيت ها

Synthesis of Multiwall Carbon Nanotubes Via Methanothermal Method for Using in Nanocomposites

Herein, we show that amorphous carbon nanoparticles (ACNPs) can be successfully transformed into multi-walled carbon nanotubes (MWCNTs) under an annealing at temperatures (1350-1380°C), assisted by crystal defects via mechanothermal method. More importantly, the detailed observation of the morphologies and structures of the nanotubes and the related intermediate objects unveils that the transformation obeys following mechanism: nanoparticles first self-assemble intonanostructures with high-ultra crystal defects and then change into nanotubes via particle-particle coalescence and structural crystallization. Crystal phases were determined by X-ray diffraction (XRD). Scanning electron microscope (SEM) was applied to investigate the morphology. The niicrostructure of the CNT products were further observed by transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM) with energy-dispersive X-ray spectroscopy (EDX). Raman spectra were taken at room temperature under ambient condition using an Almega Raman spectrometer with an Ar+ at an excitation wavelength of 514.5 nm. As a matter of fact, the method of mechanothermal guarantees the production of multi-walled carbon nanotubes (MWCNTs) for di fferent applications, especially reinforcement materials because of ultra-high aspect ratio. Keywords Synthesis, Carbon Nanotubes, Mechanothermal, Nanomaterials.