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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