GB/T 38114-2019 English PDF

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GB/T 38114-2019: Nanotechnologies - Quantitative analysis of the surface oxygen functional groups on graphene materials - Chemical titration method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38114-2019	439	Add to Cart	5 days	Nanotechnologies - Quantitative analysis of the surface oxygen functional groups on graphene materials - Chemical titration method	Valid

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Basic data

Standard ID: GB/T 38114-2019 (GB/T38114-2019)
Description (Translated English): Nanotechnologies - Quantitative analysis of the surface oxygen functional groups on graphene materials - Chemical titration method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A20
Classification of International Standard: 71.040
Word Count Estimation: 22,269
Date of Issue: 2019-10-18
Date of Implementation: 2020-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38114-2019: Nanotechnologies - Quantitative analysis of the surface oxygen functional groups on graphene materials - Chemical titration method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Nanotechnologies-Quantitative analysis of the surface oxygen functional groups on graphene materials-Chemical titration method ICS 71.040 A20 National Standards of People's Republic of China Surface of nanotechnology graphene materials with oxygen-containing functional groups Quantitative chemical titration Published on October 18,.2019 2020-09-01 implementation State Administration of Market Supervision Published by China National Standardization Administration

Contents

Foreword III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Method Overview 2 5 Reagent 2 6 Instrument 2 7 Measurement step 3 7.1 Sample preparation 3 7.2 Reaction of sample with lye 3 7.3 Titration 4 8 Results calculation and representation 4 8.1 Alkali consumption 4 8.2 Content of oxygen-containing functional groups 5 9 Test report 5 Appendix A (informative) Test procedure example 7 Appendix B (informative) Example of data record and test report 8 Appendix C (Informative) Test Example 10

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the Chinese Academy of Sciences. This standard is under the jurisdiction of the National Nanotechnology Standardization Technical Committee Nanomaterials Subcommittee (SAC/TC279/SC1). This standard was drafted. Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Jinan Shengquan Group Co., Ltd., Polyfluorochemicals Co., Ltd. Co., Ltd., Jiangsu Special Equipment Safety Supervision and Inspection Institute [National Graphene Product Quality Supervision and Inspection Center (Jiangsu)], Chinese Science Dalian Institute of Chemical Physics, Shandong Eastern Platinum New Materials Co., Ltd., Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Beijing Chemical Analysis and Testing Center, National Nanoscience Center, Metallurgical Industry Information Standards Research Institute, Zhongguancun Huaqing Graphene Industry Technology Innovation Alliance, Tsinghua University. The main drafters of this standard. Chen Chengmeng, Huang Xianhong, Xie Lijing, Dai Shifeng, Ge Guanglu, Li Qian, Wu Zhongshuai, Liu Zhaoping, Zhao Yongbin, Liu Weili, Li Jie, Zheng Yingfu, Kong Qingqiang, Zhang Qiang, Wang Qinsheng, Hu Xinghua, Geng Qichen, Shi Xiuhua, Liu Ye, Bai Yun, Lu Huanming, and Zhang Xiumei.

Introduction

During the preparation or application of graphene powder materials, some oxygen-containing functional groups may be introduced, such as carboxyl groups, lactone groups, phenolic hydroxyl groups, and carbonyl groups. Base etc. These oxygen-containing functional groups have properties such as electronic characteristics, wettability, electrical conductivity, thermal conductivity, and chemical reactivity of graphene powder materials. Has an important impact. Therefore, the type and content of oxygen-containing functional groups on the surface of graphene powder materials are measured to control the quality of graphene powder materials. And application has very important guiding significance. The methods for determining the oxygen-containing functional groups on the surface of graphene powder materials mainly include Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectric Energy spectroscopy (XPS), electron energy loss spectroscopy (EELS), fluorescent labeling, and Boehm titration. Boehm titration has low Cost, repeatability, easy operation, etc.This standard uses Boehm titration to quantitatively analyze four types of carboxyl, lactone, phenolic hydroxyl and carbonyl The content of oxygen-containing functional groups. Surface of nanotechnology graphene materials with oxygen-containing functional groups Quantitative chemical titration Caution. Personnel using this standard should have practical experience in regular laboratory work. This standard does not address all possible security issues. question. Some test procedures specified in this standard may lead to dangerous situations.It is the responsibility of the user to take appropriate safety and health measures and to ensure that The certificate meets the conditions stipulated by relevant national laws and regulations.

1 Scope

This standard specifies the summary of methods, reagents, instruments, and methods for the quantitative analysis of oxygen-containing functional groups on the surface of graphene powder materials by chemical titration. Measurement procedures, results calculation and presentation, and test reports. This standard is applicable to the determination of graphene powder materials.The detection limit of carboxyl, lactone, phenolic hydroxyl and carbonyl groups on the surface of graphene materials. They are 0.015 mmol/g, 0.037 mmol/g, 0.014 mmol/g, 0.072 mmol/g. This standard does not apply to sulfonated graphene materials. For the quantitative analysis of the oxygen-containing functional group content of other carbon materials, please refer to this standard get on.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. Preparation of GB/T 601 chemical reagent standard titration solution GB/T 6682-2008 Analytical laboratory water specifications and test methods

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Graphene Graphene layer Single-layergraphene; monolayergraphene A single layer of carbon atoms formed by combining one carbon atom with three surrounding carbon atoms to form a honeycomb structure. Note 1. It is an important building block for many carbon nano-objects. Note 2. Because graphene has only one layer, it is usually called single-layer graphene. Graphene is abbreviated as 1LG to distinguish it from double-layer graphite abbreviated as 2LG And a few layers of graphene abbreviated FLG. Note 3. Graphene has boundaries, and there are defects and grain boundaries where the carbon-carbon bonds are broken. [GB/T 30544.13-2018, definition 3.1.2.1] 3.2 Graphene material Two-dimensional materials and their derivatives made of graphene alone or stacked with no more than 10 layers. Note 1. Graphene materials include single-layer graphene, double-layer graphene, and multi-layer graphene. ......

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