Table 2.
Physicochemical characteristics of the multi-walled carbon nanotubes (MWCNT) used in the study
| NT1 | NT2 | NT3 | ||
|---|---|---|---|---|
| Coating polymer (50/50 wt%) | None | Carboxylic polyacid polymer | PMMAa polymer | |
| Diameter (nm) | 12 ± 1 | 12 ± 1 | 12 ± 1 | |
| 0-15 nm | 85% | 85% | 85% | |
| Size distribution (diameter) | 15-30 nm | 13% | 13% | 13% |
| >30 nm | 2% | 2% | 2% | |
| Length (μm) | 0.1-13 | 0.1-13 | 0.1-13 | |
| Metallic impurities | Aluminium (%) | 3.2 | 1.15 | 1.25 |
| Iron (%) | 2.45 | 0.75 | 0.85 | |
| Specific surface (m2/g) | 227.4 | 54.1 | 34 | |
| Agglomerate size - mean diameter (%<10 μm) | 338 (0.13) | 118 (1.45) | 267 (0.83) | |
a Polystyrene polybutadiene polymethylacrylate (PMMA).