GB/T 43263-2023 focuses on the characterization of cellulose nanocrystals in the field of nanotechnology. This standard is applicable to all kinds of cellulose nanocrystals, covering morphological structure, size distribution, chemical composition and other characterization methods. Specifications for the use of instruments such as sem, transmission electron microscopy, and X-ray diffraction are described in detail, and the operation steps such as sample preparation and test parameter setting are clearly stipulated. According to this standard, researchers and manufacturers can accurately characterize cellulose nanocrystals, providing basic data for their application in materials, biomedicine and other fields, and promoting the development of nanotechnology industry.