▎ 摘　　要

NOVELTY - Magnetic carbon-based composite aerogel material comprises magnetic carbon nano material, amphiphilic silicon dioxide Janus nano sheet and natural biomass substrate by molecular hydrogen bond and π-π interaction to realize self-assembly, freezing and drying, the magnetic carbon nano material is the carbon nano material modified by the magnetic nano particle, the amphiphilic silicon dioxide Janus nano sheet is one side benzene ring group, the other side amino silicon dioxide Janus nano sheet, the natural biomass matrix is carboxymethyl chitosan, hydroxypropyl chitosan, hydroxypropyl methyl cellulose, cellulose nano fiber, and sodium alginate. USE - Magnetic carbon-based composite aerogel gel material used in flame retardant, heat insulation, fire protection and adsorption (claimed). ADVANTAGE - The material has flame retardant and fire early warning function which can further improve the fire safety performance of the aerogel material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a magnetic carbon-based composite aerogel material, involving: a. adding precursor of magnetic metal oxide in the carbon nano- material dispersion liquid, through alkaline catalysis, and co-precipitating the magnetic carbon nano- material modified by magnetic nano- particle under the heating condition or performing silane ligand exchange for the existing magnetic nano- particle surface using magnetic particles and functional group of carbon nano- material surface realize the carbon nano- material magnetization modification; b. sol- gelling three kinds of silicon precursors at the emulsion surface, synthesizing the hollow ball of silicon dioxide with surface chemical properties and strict partition by emulsion interface material method, then mechanically crushing to obtain the silicon dioxide Janus sheet, where the three kinds of silicon precursors are amino silane coupling agent, ethyl orthosilicate and phenyl silane coupling agent; and c. adding magnetic carbon nano material under ultrasonic condition and silicon dioxide Janus nano sheet, using intermolecular hydrogen bond and π-π interaction to realize cross-linking, after aging, freezing and drying to obtain product.