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Table 3 Results of additional particle characterization of CNT/F

From: Physicochemical characterization and genotoxicity of the broad class of carbon nanotubes and nanofibers used or produced in U.S. facilities

  MW #1 MW #2 MW #3 MW #4 MW #5 MW #6 MW #7 CNF #1 CNF #2
Surface Area
(m2/g ± SD)
237.7 ± 1.0 211.9 ± 1.8 218.6 ± 1.2 99.4 ± 1.1 25.2 ± 0.4 25.4 ± 0.4 24.7 ± 0.4 29.4 ± 0.2 18.0 ± 0.2
Dustiness
 Dustiness Total (%) 3.8 2.9 0.3 0.5 14.0 0.2 0.2 4.9 ND
 Dustiness Respirable (%) 0.84 1.10 0.20 0.20 2.40 0.08 0.09 1.40 ND
Density
 Bulk Density (g/cm3) 0.087 0.007 0.082 0.169 0.007 0.075 0.061 0.020 0.032
 Tapped Density (g/cm3) 0.119 0.008 0.095 0.222 0.010 0.095 0.073 0.028 0.045
Endotoxin BLD BLD BLD BLD BLD BLD BLD BLD BLD
PAH BLD BLD BLD BLD BLD BLD BLD BLD BLD
Metal Catalyst
 % Fe 0.317 1.725 1.603 3.423 0.270 5.006 6.169 1.168 1.142
 % Al 0.310 0.028 2.116 0.019 N/A 0.035 N/A 0.006 0.013
TGA
 TGA -Avg onset oxidation, °C 550 ± 2 603 ± 2 575 ± 0 560 ± 2 735 ± 2 581 ± 0 592 ± 0 593 ± 0 694 ± 0
 TGA - Mean Residual Ash, % 1.74 ± 0.01 3.98 ± 0.26 8.21 ± 0.26 4.75 ± 0.07 1.11 ± 0.28 7.88 ± 0.15 8.95 ± 0.29 1.79 ± 0.12 2.21 ± 0.16
Anti-oxidative Capacity
 % 64.53 ± 23.91 75.41 ± 25.66 76.34 ± 27.37 88.17 ± 28.40 91.49 ± 21.37 84.78 ± 25.74 77.27 ± 19.96 100.12 ± 22.69 99.80 ± 24.19
  1. BLD below the level of detection