Abstract
In the present study, a novel approach of wet mechanochemical oxidation of carbon nanotubes (CNTs) has been established in order to improve the uniformity in nanodispersion of the CNTs. This approach was found to be more efficient for CNT oxidation as compared to the acid oxidation method as observed from the Fourier transform infrared spectroscopy and titrometric analyses. From the x-ray diffraction and Raman spectroscopic analyses, it was also noticed that the damage to the surface of CNTs caused by acid can be prevented using wet mechanochemical process for oxidation. The transmission electron microscopic micrographs also revealed lesser degree of entanglement of the CNT fibrils. The polymer nanocomposites reinforced with wet mechanochemically oxidized CNT (McCNT) revealed considerably higher mechanical properties as compared to that of acid-oxidized CNTs. Also, the much higher uniformity in dispersion and nucleating effect of the McCNT was observed from the Raman spectroscopy and differential scanning calorimetry analysis, respectively.
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