A method for determining graphene composition and content in materials

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...

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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

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