Page 159 - Carbon Nanotube Fibres and Yarns

150 Carbon Nanotube Fibers and Yarns

Yarn porosity a 0.85 0.64 0.64 0.63 0.54 0.57

Yarn density (g/cm 3 ) a 0.240 0.577 0.576 0.596 0.743 0.688

Tubes per bundle 11.7 44.6 64.2 85.8

Between-bundle section area distance (nm) 61.8 64.9 39.8 46.1 40 33 a Calculated values from reported yarn linear density/cross-sectional area and a CNT density of 1.6 g/cm 3 (i.e., nanotubes treated as solid cylinders).

Solvent-densified yarn morphology [32]. Yarn cross- Yarn linear (μm 2 ) density (tex) 417 0.1 208 0.12 243 0.14 218 0.13 148 0.11 160 0.11

Table 7.1 As-spun NMP NMP (7% stretch) CSA CSA (7% stretch) CSA (13% stretch)