▎ 摘　　要

To improve its dispersion and flame retardant efficiency, graphene oxide (GO) was modified multiple times with functional elements and the graphene-based flame retardant was endowed with catalytic carbonation ability to reduce flammability and smoke suppression of epoxy resin (EP). The graphene-based flame retardant (MZP-GO) was successfully synthesized by incorporating functional elements (phosphorus, zinc, tin, and molybdate) into graphene oxide nanosheets. Subsequently, the resulting MZP-GO was added to EP to prepare EP composites. The MZP-GO showed well-dispersed behavior in the EP matrix. After adding 2 wt% MZP-GO to the EP matrix, the fire test results showed a significant reduction in heat and smoke. Compared with pure EP, the EP composite shows a 62.9% reduction in the peak heat release rate and a 52.7% smoke production rate. Moreover, the limiting oxygen index value was improved from 25.4% to 29.7%, and the sample could easily pass the UL-94 V-0 rating. This study provides a novel strategy to fabricate high-performance flame-retardant polymer materials with expandable practical applications.