▎ 摘　　要

NOVELTY - Preparing silica (SiO2)-graphene modified phenolic resin material with high mechanical properties involves adding hydroxylated graphene to distilled water solvent, and subjecting to ultrasonic treatment for 60-120 minutes to obtain hydroxylated graphene suspension. Cetyltrimethylammonium bromide is added to the graphene suspension, the pH is adjusted to 8-10, ethyl orthosilicate is added, magnetically stirred at 30-50 degrees C for 18-24 hours, where the mass ratio of hydroxylated graphene, cetyltrimethylammonium bromide and ethyl orthosilicate is 100:1800-2200:800-1000. The product of SiO2 modified graphene composite material is obtained after washing and drying. The silane coupling agent gamma -(2,3-glycidoxy)propyltrimethoxysilane and SiO2-graphene are added to the absolute ethanol, and ultrasonic reaction is performed for 5-10 hours. The product is dried, and epoxy functionalized SiO2-graphene is prepared. USE - Method for preparing silica-graphene modified phenolic resin material with high mechanical properties. ADVANTAGE - The method improves mechanical properties of the composite phenolic resin material by using SiO2-graphene composite material has very good mechanical properties. It can further improve the mechanical properties such as the bending strength and compression strength of the phenolic resin, and the introduction of cardanol increases the molecular weight of the modified phenolic resin and the ability of the resin to bond SiO2. DETAILED DESCRIPTION - Preparing silica (SiO2)-graphene modified phenolic resin material with high mechanical properties involves adding hydroxylated graphene to distilled water solvent, and subjecting to ultrasonic treatment for 60-120 minutes to obtain hydroxylated graphene suspension. Cetyltrimethylammonium bromide is added to the graphene suspension, the pH is adjusted to 8-10, ethyl orthosilicate is added, magnetically stirred at 30-50 degrees C for 18-24 hours, where the mass ratio of hydroxylated graphene, cetyltrimethylammonium bromide and ethyl orthosilicate is 100:1800-2200:800-1000. The product of SiO2 modified graphene composite material is obtained after washing and drying. The silane coupling agent gamma -(2,3-glycidoxy)propyltrimethoxysilane and SiO2-graphene are added to the absolute ethanol, and ultrasonic reaction is performed for 5-10 hours. The product is dried, and epoxy functionalized SiO2-graphene is prepared. Cardanol and phenolic resin are added to the flask, stirred in a water bath at 60-70 degrees C, sodium hydroxide is added, stirred uniformly, paraformaldehyde and functionalized SiO2-graphene are added, reacted for 2-4 hours, the temperature is increased to 80-100 degrees C, and the reaction is continued for 40-60 minutes. The reaction material is filled into the mold, passed through a plate vulcanizing machine, hot pressed, and cooled and demolded, and SiO2-graphene modified phenolic resin material with high mechanical properties is prepared.