▎ 摘　　要

NOVELTY - Measuring average sheet diameter of two-dimensional material, comprises mixing the two-dimensional material to be measured, the adhesive and the solvent evenly, so that the two-dimensional material is dispersed in the solvent, and dissolving adhesive in the solvent to obtain a two-dimensional material/adhesive mixed solution, filtering the two-dimensional material/adhesive mixed solution on a filter membrane, and drying to obtain a two-dimensional material/adhesive composite film with an area of S and a thickness of T, measuring the gas permeability P of the two-dimensional material/adhesive composite film, and calculating according to the relationship between the average sheet radius R of the two-dimensional material to be measured and the gas permeability P to obtain the average sheet diameter of the two-dimensional material to be measured. USE - Method for measuring average sheet diameter of two-dimensional material. ADVANTAGE - The method quickly and directly obtains the average sheet diameter of a large amount of two-dimensional material, and the sheet radius. The method is simple and fast, and can be used as a reliable determining method of the constant of the gas transmittance and the thickness of the adhesive film. The gas permeability test and calculation of the method can be performed in a simple and quick manner. The average sheet radius of the 2D material to be measured can be measured in a short period of time, so that the time required for measuring the gas transmission rate can be reduced. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional structure diagram of a two-dimensional material/adhesive composite film (Drawing includes non-English language text).