Electrical conductivity of chemically modified multiwalled carbon nanotube/epoxy composites

An efficient method for the carboxylation of few-wall carbon nanotubes with little damage to their sidewalls

“…In agreement with our previous findings, both as-received and oxidized nanotubes exhibit a negative potential being lower for the oxidized nanotubes. It is noteworthy that our results show lower values than those reported by Bae et al [43] and are similar to those found by Kim et al [15], who used a more aggressive oxidation treatment (1 h at 100 C with 40% HNO 3 ); however, z-potential values are higher than those reported by Hu [44], who used very long treatment periods in the presence of HNO 3 .…”

“…The surface electric potential could be characterized by z-potential measurements. In this context, Kim et al [15] reported that z-potential of pristine nanotubes exhibited a positive value, whereas oxidized nanotubes using HNO 3 were negatively charged, and the absolute value increased with the strength of the oxidation process. z-potential values for our commercial and oxidized FWNTs are presented in Table 3.…”

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

“…The presence of bromine caused the formation of ionic and covalent bonds with the matrix, improving the flexibility of the composites, and the electrical conductivity. However, some studies [25,[48][49][50] have shown that the surface functionalisation of GNP can also decrease the electrical properties of the nanocomposites compared to when unmodified GNP is used. As the electron displacement is known to occur mainly on the surface of graphene, highly functionalising the surface might increase the mechanical properties but decrease the electrical properties of the final product.…”

Carbon Nanotubes: Detection of Chemical and Biological Warfare Agents

“…3 and 4). As a result of this, many layers that MWCNTs are built from, are much more rigid than that of SWCNTs 23,24 .…”