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A kind of thermogravimetric analysis method for graphene oxide

A technology of thermogravimetric analysis and graphene, which is applied in the analysis of materials, material weighing, instruments, etc., can solve the problems of inaccurate test results, etc., and achieve the effect of fast test process, simple operation and low cost

Active Publication Date: 2019-02-22
QINGDAO HUAGAO GRAPHENE CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing thermogravimetric analysis to measure and analyze the properties of graphene oxide is a conventional technology choice in this field, but in the prior art, when graphene oxide is subjected to thermogravimetric analysis and testing, graphene oxide will be reduced to Graphene and the reaction is violent, so that graphene overflows the test crucible, and even overflows the thermogravimetric analysis instrument, resulting in inaccurate test results (such as figure 1 shown), so as to affect the overall performance test of graphene oxide, so the present invention researches and designs a kind of thermogravimetric analysis method for graphene oxide, which better solves the problem of graphene overflow, and can obtain accurate thermal Heavy curve, to achieve the expected test purpose

Method used

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  • A kind of thermogravimetric analysis method for graphene oxide
  • A kind of thermogravimetric analysis method for graphene oxide

Examples

Experimental program
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Embodiment 1

[0015] The thermogravimetric analysis method for graphene oxide that the present embodiment relates to comprises the following steps:

[0016] (1) Pass the graphene oxide powder through a 100-300 mesh sieve, and dry it under vacuum conditions at 50-100°C for 1-6h to constant weight, and put it in a desiccator as a sample for subsequent use;

[0017] (2) Accurately weigh 0.1-50.0 mg of the above-mentioned sample with an electronic balance and put it into a crucible, and then accurately weigh 1.0-100.0 mg of the above-mentioned sample with an electronic balance Or add the powder material formed by doping with quartz into the crucible where the sample is placed and stir and mix evenly; the other crucible is an empty crucible, and then put the two crucibles into the thermogravimetric analyzer at the same time;

[0018] (3) Start the thermal analysis software for thermogravimetric analysis, set the heating range to 25-800°C, the heating rate to 5-200°C / min, preferably 10°C / min or 2...

Embodiment 2

[0020] In this embodiment, the sample without powder material is used as a reference example, and the same thermogravimetric analysis method as in Example 1 is used for analysis and testing, the difference is that only 0.1-50.0 mg of the sample is put into a crucible. In the same way, the other crucible is an empty crucible, and then the two crucibles are placed on the two trays of the sample holder in the thermogravimetric analyzer respectively and the insulation cover is covered to carry out the subsequent steps. The obtained graphene oxide thermogravimetric curve is as follows figure 1 shown.

[0021] Comparing the test results in Example 1 and Example 2, it can be seen that: after the powder material is added in Example 1, the graphene oxide density in the test crucible is reduced, thereby effectively reducing the friction between the graphene oxide powders. Contact, so that when it reaches the reduction temperature, the severity of the reaction is slowed down, and the ove...

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Abstract

The invention belongs to the technical field of chemical testing and analysis, and relates to a thermogravimetric analysis method for graphene oxide: (1) sieving graphene oxide powder and drying it to a constant weight under vacuum conditions as a sample for later use; (2) Put the sample and powder material into a crucible respectively for stirring and mixing, the powder material is formed by doping with sodium chloride, aluminum oxide, quartz, strontium carbonate, graphite and / or zirconium dioxide, the sample and The mass ratio of the powder material is 1:0.1~1:100. After stirring evenly, put the crucible and another empty crucible into the thermogravimetric analyzer at the same time; (3) start the thermal analysis software for thermogravimetric analysis, set The temperature rise rate is 5-200°C / min, the temperature rise range is 25-800°C, and the test is started with inert gas or air atmosphere, so as to realize the thermogravimetric analysis of graphene oxide; this method is low in cost, simple in process, scientific in principle and easy to operate It is simple, requires few samples, and the testing process is fast and accurate, without pollution and waste.

Description

Technical field: [0001] The invention belongs to the technical field of chemical testing and analysis, and relates to a thermogravimetric analysis method for graphene oxide, which avoids the phenomenon of graphene overflowing during the thermogravimetric analysis of graphene oxide in the prior art. Background technique: [0002] Thermogravimetric Analysis (Thermo gravimetric Analysis, TG or TGA) refers to a thermal analysis technique that measures the relationship between the mass of the sample to be tested and the temperature or time change under the program control temperature. It is generally used to study the thermal stability and composition of materials. share. In the prior art, TGA is a commonly used detection method in research and development and quality control, and it is often used in conjunction with other analysis methods for comprehensive thermal analysis in actual material analysis, so as to achieve the purpose of comprehensive and accurate material analysis. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 钟成张丽东魏万林
Owner QINGDAO HUAGAO GRAPHENE CORP LTD
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