▎ 摘　　要

NOVELTY - Super-waterproof straw-silica-graphene composite material is obtained by mixing and ball milling granular straw material, hydrophobic nano-silica and graphene in a mass ratio of 60:(3-6):(1-3). USE - As super-waterproof straw-silica-graphene composite material. ADVANTAGE - The composite material adopts simple and efficient, is easy for industrial application, realizes integrated treatment of straw fiber and straw and super-waterproof performance of the straw material, improves the added value of the material and expands the application range of the straw material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite material involving (1) drying straw fiber and straw core and mechanically grinding to a powder having a particle size of less than 100 mu m and (2) mixing the straw powder with hydrophobic nano-silica, ball-milling for 5 minutes and adding graphene for mixing and ball milling for 10 minutes, where the straw powder, hydrophobic type nano-silica and graphene in a mass ratio of 60:(3-6):(1-3).