| 摘要 |
The multiple-wall carbon nanotubes were oxidized and functionalized with the purpose of determining the structural and chemical changes suffered over the atomic bond thereof. The oxidation was performed in an aqueous dissolution of nitric acid (HNO3) between 50% and 70%, and sulfuric acid (H2SO4) between 80% and 95% at a temperature of from about 20°C to about 50°C. The oxidized and non-oxidized carbon nanotubes were characterized by Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and Thermogravimetric analysis (TGA). The oxidized and non-oxidized carbon nanotubes were functionalized with silane groups 3-glicidoxi propyltrimethoxisilane or triethoxy (octil) silane and incorporated to a polymeric matrix, preferably methyl polymethacrylate (PMMA). Resistivity results are obtained, which turn the invention into nanotubes useful to be applied in microdevices, biomedical devices and industrial sensing systems. |
