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Table 2 Diameters and wall thickness of the HCNFs before and after carbonization process

From: Control of physical properties of carbon nanofibers obtained from coaxial electrospinning of PMMA and PAN with adjustable inner/outer nozzle-ends

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