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Diss Factsheets

Physical & Chemical properties

Nanomaterial surface chemistry

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Administrative data

Endpoint:
nanomaterial surface chemistry
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2019 / 2021
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2021
Report date:
2021
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Principles of method if other than guideline:
Elemental analysis
Thermo Scientific Flash 2000 elemental analyzer (NCHS)
Thermo Finnigan FLASH EA-1112 Series Elemental Analyzer (O)
GLP compliance:
not specified
Type of method:
AES

Test material

Constituent 1
Chemical structure
Reference substance name:
carbon
EC Number:
936-414-1
Molecular formula:
C
IUPAC Name:
carbon
Test material form:
solid: nanoform, no surface treatment
Details on test material:
-- Jenotube 6A - SIP
Purity (wt%) : 98 – 99.2
Bundle length : 10.6 μm – 211.1 μm
Bundle diameter : 0.6 μm – 8.8 μm
Tube diameter : 4.4 nm – 12.8 nm
BET surface area (m²/g) : 576 – 742
Number of walls : 3 – 9

-- Jenotube 8A – SIP
Purity (wt%) : 98.5 – 99.7
Bundle length : 1.9 μm – 552.0 μm
Bundle diameter : 0.33 μm – 7.93 μm
Tube diameter : 5.1 nm – 11.6 nm
BET surface area (m²/g) : 541 – 618
Number of walls : 5 – 8

-- Jenotube 10A – SIP
Purity (wt%) : 97.8 – 99.2
Bundle length : 9.4 μm – max. 106.4 μm
Bundle diameter : 1.1 μm – 15.24 μm
Tube diameter : 7.9 nm – max. 14.2 nm
BET surface area (m²/g) : 223 – 278
Number of walls : 5 – 12

-- Jenotube 10B – SIP
Purity (wt%) : 97.3 – 98.9
Bundle length : 10.5 μm – 117.7 μm
Bundle diameter : 1.1 μm – 15.4 μm
Tube diameter : 8.3 nm – 17.9 nm
BET surface area (m²/g) : 181 – 249
Number of walls : 7 – 18

-- Jenotubes 6A, 8A, 10A and 10B
Shape category : elongated
Shape of particles : tube
Pure shape : yes
Crystal structure : crystalline
Pure structure : yes
Crystal system : armchair, zig-zag and chiral
Surface treatment/functionalisation : no
State of aggregation : agglomerated

Data gathering

Instruments:
Thermo Scientific Flash 2000 elemental analyzer (NCHS)
Thermo Finnigan FLASH EA-1112 Series Elemental Analyzer (O)

Results and discussion

Coating / functionalisation:
neither

Coating

Atomic compositionopen allclose all
Key result
Element:
Nitrogen
Remarks on result:
not determinable
Remarks:
(< LOD) Jenotube 10B
Key result
Element:
Oxygen
Fraction:
>= 0.35 - <= 0.37
Remarks on result:
other: Jenotube 10B
Key result
Element:
Hydrogen
Remarks on result:
not determinable
Remarks:
(< LOD) Jenotube 10B
Key result
Element:
Carbon
Fraction:
>= 96.6 - <= 97.4
Remarks on result:
other: Jenotube 10B
Key result
Element:
Oxygen
Fraction:
>= 0.16 - <= 0.18
Remarks on result:
other: Jenotube-10A
Key result
Element:
Nitrogen
Remarks on result:
not determinable
Remarks:
(< LOD) Jenotube 10A
Key result
Element:
Hydrogen
Fraction:
>= 0.11 - <= 0.13
Remarks on result:
other: Jenotube-10A
Key result
Element:
Carbon
Fraction:
>= 95.8 - <= 96
Remarks on result:
other: Jenotube-10A
Key result
Element:
Oxygen
Fraction:
>= 0.3 - <= 0.35
Remarks on result:
other: Jenotube-8
Key result
Element:
Hydrogen
Fraction:
>= 0.18 - <= 0.2
Remarks on result:
other: Jenotube-8
Key result
Element:
Carbon
Fraction:
>= 97.32 - <= 97.65
Remarks on result:
other: Jenotube-8
Key result
Element:
Nitrogen
Fraction:
>= 0.04 - <= 0.05
Remarks on result:
other: Jenotube-8
Key result
Element:
Oxygen
Fraction:
>= 0.68 - <= 0.69
Remarks on result:
other: Jenotube-6
Key result
Element:
Hydrogen
Fraction:
>= 0.15 - <= 0.16
Remarks on result:
other: Jenotube-6
Key result
Element:
Carbon
Fraction:
>= 95.73 - <= 96.15
Remarks on result:
other: Jenotube-6
Key result
Element:
Nitrogen
Fraction:
>= 0.04 - <= 0.05
Remarks on result:
other: Jenotube-6

Any other information on results incl. tables

See details in study reports. Full study reports are attached to the references given under section "Data source".

Applicant's summary and conclusion

Conclusions:
Elemental analysis was performed to determine the organic elemental ratio in the sample. N/C/H/S and oxygen analyses were performed using Thermo Scientific Flash 2000 elemental analyzer and Thermo Finnigan FLASH EA-1112 Series Elemental Analyzer, respectively. The samples were encapsulated into tin and silver capsule for C/N/H/S and oxygen analysis, respectively, and then dropped into reactor chamber. N/C/H/S were measured as follows depending on the member of the set of MWCNT.
Nitrogen avg. n.d. - 0.05 % (w/w)
Carbon avg. 95.9 - 97.46 % (w/w)
Hydrogen avg. n.d. - 0.19 % (w/w)
Oxygen avg. 0.17 - 0.69 % (w/w)
Executive summary:

Elemental analysis was performed to determine the organic elemental ratio in the sample. N/C/H/S and oxygen analyses were performed using Thermo Scientific Flash 2000 elemental analyzer and Thermo Finnigan FLASH EA-1112 Series Elemental Analyzer, respectively. The samples were encapsulated into tin and silver capsule for C/N/H/S and oxygen analysis, respectively, and then dropped into reactor chamber.









































 



Nitrogen avg.



Carbon avg.



Hydrogen avg.



Oxygen avg.



Jenotube-6A



0.04



95.95



0.15



0.69



Jenotube-8A



0.05



97.46



0.19



0.32



Jenotube-10A



Not detected



95.9



0.12



0.17



Jenotube-10B



Not detected



97.0



Not detected



0.36