▎ 摘　　要

NOVELTY - Preparing carbon-based ultra-black anti-stray light nanocomposite coating involves preparing carbon aerogel filler by subjecting the aerogel to supercritical drying, carbonization and activation in sequence to obtain a hierarchical porous carbon aerogel filler, mechanically mixing graphene and the obtained carbon aerogel, and fully mixing to obtain graphene composite carbon aerogel filler. The graphene composite carbon aerogel filler is mixed with resin binder and organic solvent, ultrasonically stirred to obtain a carbon-based ultra-black nano-coating which is applied on the surface of the treated substrate and cured. USE - Method for preparing carbon-based ultra-black anti-stray light nanocomposite coating. ADVANTAGE - The carbon-based ultra-black anti-stray light nanocomposite coating reduces the stray light interference of the spacecraft optical load in a special environment, ensures the reliability of the spacecraft operation, and meets the optical load's demand for stray light suppression. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a carbon-based ultra-black anti-stray light nanocomposite coating