▎ 摘　　要

NOVELTY - Graphene nanomaterial has a particle size distribution having a dn(90) of 0.60 mu m or smaller in number of particle and a dv(90) of 80 mu m or smaller in volume particle, as measured by laser diffraction particle analyzer, where the graphene nanomaterial is chosen from graphene nanofibers, graphene oxide or reduced graphene oxide, or their combinations. USE - The graphene nanomaterial is useful in pharmaceutical composition in form of membrane, matrix or transdermal delivery system, which is used for treating wounds, scars, eczema, skin burns, skin ulcers or other skin lesions produced by psoriasis, diabetes, cancer, infections, acne or decreased circulation of blood or preparing product from raw graphene nanofibers, graphene oxide or reduced graphene oxide (all claimed). The graphene nanomaterial is also used for treating wounds, eczema, psoriasis, scars, ulcers and other conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing product from raw graphene nanofibers, graphene oxide or reduced graphene oxide, which involves (a) purifying the raw graphene material, preferably using a strong acid to remove any metal or impurity present in the graphene raw material, (b) reducing the particle size of the purified graphene nanomaterial, preferably through an exfoliation process to a particle size distribution having a dn(90) of 0.60 mu m or smaller in number of particle and a dv(90) of 80 mu m or smaller in volume particle, as measured by laser diffraction particle analyzer, and (c) subjecting the obtained product to a depyrogenization process.