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A method for determining graphene composition and content in materials

A graphene content technology, applied in the direction of material excitation analysis, Raman scattering, etc., can solve the problems that the influence of organic solvents and polymer Raman signals cannot be ruled out, the technology is difficult, and the content of graphene cannot be determined.

Active Publication Date: 2020-09-01
2D CARBON CHANGZHOU TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The disadvantages of this method are as follows: 1. The application scenario is limited to the composite slurry of graphene and carbon nanotubes. At present, it is impossible to make an effective judgment on the polymer composite material in solid state, and it is impossible to rule out the impact of organic solvents and polymers on Raman. Signal influence; 2. Composite slurries with different ratios need to be prepared before the measurement, and the standard curve can be measured and fitted, and the graphene content of the unknown formula cannot be determined; 3. The calculation of peak area and the process of fitting the curve are easy to introduce errors, and the technical difficulty is great

Method used

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  • A method for determining graphene composition and content in materials
  • A method for determining graphene composition and content in materials
  • A method for determining graphene composition and content in materials

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Embodiment Construction

[0037] The method of the present invention extracts the graphene-containing conductive filler from the graphene conductive polymer composite material; collects the Raman spectrum of the sample and the collection spectrum of the standard graphene sample, and compares and calculates the collection diagram to obtain the graphene sample in carbon content in the conductive filler.

[0038] The test material of the present invention is preferably a graphene conductive composite material.

[0039] The method of the present invention uses a solvent and utilizes the solubility difference between the carbonaceous filler and the polymer matrix material in the graphene polymer composite material to separate the insoluble filler containing graphene from the composite material; directly perform Raman on the insoluble filler Characterize and obtain the characteristic Raman spectrum of the mixture; use the characteristic D peak, G peak and 2D peak of the carbonaceous material to compare and c...

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Abstract

The invention discloses a method for determining graphene and graphene content of a material. According to the method, whether graphene is contained in an extract is determined and content of graphenein the extract is calculated by measuring Raman spectra of the to-be-measured extract and a graphene standard sample, extracting characteristic parameters and comparing the characteristic parametersof the Raman spectra of the to-be-measured extract and the graphene standard sample. With the adoption of the method, relative content of graphene in packing can be rapidly measured without any complicated physical and chemical measuring process; the testing method is greatly simplified, and disturbance of other packing can be eliminated completely.

Description

technical field [0001] The invention relates to the field of conductive composite materials, more specifically, the invention relates to a test method for determining the content of graphene in materials. Background technique [0002] Graphene is a two-dimensional crystal with a single atomic layer of carbon atoms tightly packed in a hexagonal structure, and its intrinsic mobility of carriers can reach 2×10 5 cm / (V*S), this excellent electrical property makes it have great application value in many fields such as high-frequency electronic devices. [0003] Because the composite material with graphene as conductive filler is used for electric heating, it has the characteristics of wide applicable power range, high infrared radiation rate, and good power stability, and has gradually been recognized and welcomed by the market. However, there are a large number of so-called "graphene heating" products on the market, which are actually made of low-cost conductive carbon black an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
Inventor 金虎宋琪曾祥英
Owner 2D CARBON CHANGZHOU TECH INC
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