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GB/T 34916-2017: Nanotechnologies -- Multi-walled carbon nanotubes -- Determination of amorphous carbon content by thermogravimetric analysis
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Nanotechnologies -- Multi-walled carbon nanotubes -- Determination of amorphous carbon content by thermogravimetric analysis
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GB/T 34916-2017
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Basic data | Standard ID | GB/T 34916-2017 (GB/T34916-2017) | | Description (Translated English) | Nanotechnologies -- Multi-walled carbon nanotubes -- Determination of amorphous carbon content by thermogravimetric analysis | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H70 | | Classification of International Standard | 59.100.20 | | Word Count Estimation | 10,112 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-09-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34916-2017: Nanotechnologies -- Multi-walled carbon nanotubes -- Determination of amorphous carbon content by thermogravimetric analysis
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Nanotechnologies - Multi-walled carbon nanotubes - Determination of amorphous carbon content by thermogravimetric analysis
ICS 59.100.20
H70
National Standards of People's Republic of China
Nanotechnology Multi-walled carbon nanotubes
Thermogravimetric analysis of amorphous carbon content
2017-12-29 Posted
2018-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Preface Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 principle 1
5 instruments and reagents 2
6 determination method 2
7 Results Analysis 3
8 test report 4
Appendix A (informative) Thermogram chart of atypical multi-walled carbon nanotubes Figure 5
Appendix B (Informative) Multi-walled carbon nanotubes amorphous carbon content test report 6
References 7
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard proposed by the Chinese Academy of Sciences.
This standard by the National Standardization Technical Committee Nanomaterials Nano-Technical Committee (SAC/TC279/SC1) centralized.
This standard was drafted unit. Shenzhen, Germany Nano Technology Co., Ltd., China Institute of Metrology, Foshan Fang Nano Science and Technology
Limited.
The main drafters of this standard Kong Ling Chung, Ren Ling, Shang Wei Li, Xu Hao.
Introduction
Multi-walled carbon nanotubes (CNTs) are hollow single-walled carbon nanotube materials that are curled or coaxially nested by three or more graphene sheets. Carbon nano
The existence of amorphous carbon nanotubes will affect the purity of carbon nanotubes, thereby affecting the physical and chemical properties of carbon nanotubes, so the need for amorphous
Carbon content is measured.
At present, multi-walled carbon nanotubes for the determination of amorphous carbon content, the use of a more extensive method of transmission electron microscopy, temperature programmed oxidation
Method, thermogravimetric method, etc. Among them, thermogravimetric analysis (TGA) is a common method. In carbon dioxide
As a reactive gas oxidation environment, carbon and carbon dioxide endothermic reaction occurs. Carbon nanotubes have a relatively stable junction over amorphous carbon
Structure, has lower reactivity than amorphous carbon, with the result that amorphous carbon will react preferentially and thus will not cause carbon nanotubes
Impact, the resulting weight loss by thermogravimetric analysis. This standard uses the principle of carbon dioxide and carbon reaction, the use of thermal gravimetric analysis of multi-walled carbon
Amorphous carbon nanotube content.
Nanotechnology Multi-walled carbon nanotubes
Thermogravimetric analysis of amorphous carbon content
1 Scope
This standard specifies the terms and definitions of the determination of amorphous carbon content in multi-walled carbon nanotubes by thermogravimetric analysis under a carbon dioxide atmosphere,
Using instruments and reagents, determination methods and procedures, analysis of results and test report content.
This standard applies to chemical vapor deposition obtained metal oxide content of less than 10% of the multi-walled carbon nanotubes. Other preparation methods
Multi-walled carbon nanotubes can be obtained by reference to this method.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 5314 powder metallurgy powder sampling method
GB/T 6425 thermal analysis terms
GB/T 19619 nanomaterials terminology
GB/T 24491 multi-walled carbon nanotubes
Thermogravimetric analysis of oxidation temperature and ash content of carbon nanotubes
JC/T 2144 carbon nanotubes purity test method
3 Terms and definitions
GB/T 6425, GB/T 19619, GB/T 24491 and GB/T 29189 defined by the following terms and definitions apply to this
file.
3.1
Amorphous carbon amorphouscarbon
Amorphous carbon and disordered carbon formed by the stacking of molecular fragments of the graphite layered structure.
4 principle
This standard is based on the characteristics of multi-walled carbon nanotubes and amorphous carbon in carbon dioxide at high temperature reactivity differences, the use of carbon dioxide oxygen
Multi-walled carbon nanotubes amorphous carbon, with a thermal gravimetric analyzer to record the relationship between the sample mass and temperature, that is, thermogravimetry (thermogravimetry,
TG) curve. When amorphous carbon and carbon dioxide react, continue to absorb the heat of the surrounding environment, will not cause the local temperature is too high and up to
To the reaction temperature of the multi-walled carbon nanotubes, thereby separating the amorphous carbon and the multi-walled carbon nanotubes reaction process, the reaction is as follows.
C CO2 → 2CO-Q
In the formula.
C --- amorphous carbon;
Q --- heat.
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