1 Identification principle: remove polymer interference and enrich the target sample by dissolving and centrifugal separation, and use the characteristic signals of graphene materials in Raman spectrum, atomic force microscope (AFM) and X-ray diffraction (XRD) to determine whether there is presence in the fiber Graphene material. 2 Judgment Principles: The test results should simultaneously meet: 1. There is an obvious G peak in the Raman spectrum; 2. The micromorphology (AFM) has significant two-dimensional characteristics; 3. 26°~27° in the XRD spectrum Only when there is no obvious crystallization peak or the half-peak width of the crystallization peak is greater than 2.3° can it be determined that "the fiber contains graphene material".
T/CCFA 00012-2022 history
2022T/CCFA 00012-2022 Qualitative identification of graphene material in fibers