Table 2 Diameters and wall thickness of the HCNFs before and after carbonization process
Nozzle-end level | Before carbonization | After carbonization | Shrinkage (%) | ||||
---|---|---|---|---|---|---|---|
Overall diameter (μm) | Core diameter (μm) | Wall thickness (μm) | Overall diameter (μm) | Core diameter (μm) | Wall thickness (μm) | ||
Inward | 1.42 | 0.82 | 0.26 | 0.72 | 0.31 | 0.22 | 49.30 |
Normal | 1.38 | 0.57 | 0.39 | 0.53 | 0.29 | 0.11 | 61.59 |
Outward | 1.88 | 1.04 | 0.36 | 0.47 | 0.27 | 0.14 | 75.03 |