▎ 摘　　要

NOVELTY - Preparing high compression and flame-resistant composite epoxy foam comprises (i) preparing low-activity benzyl hydroxy-epoxy intermediate through an addition reaction, and obtaining high heat-resistant boron phenolic epoxy resin through a polycondensation reaction, (ii) obtaining multifunctional graphene oxide reinforced particle through the grafting reaction of boron novolac epoxy resin to graphene oxide, (iii) using three raw materials of boron novolac epoxy resin, multifunctional graphene oxide reinforcing particles and bifunctional foaming agent sulfonyl hydrazide, and preparing foaming precursor by the method of pre-curing, and (iv) completing post-curing process of the epoxy foam by the synergistic curing action of the bifunctional foaming agent. USE - The high compression and flame-resistant composite epoxy foam used in aerospace industry, rail transportation industry, and automobile industry. ADVANTAGE - The method solves the problem of the decrease of epoxy value and residual boric acid caused by the high activity of benzyl hydroxy group in resin synthesis, and successfully prepares high temperature resistant foamed resin matrix containing boron, by adding a bifunctional foaming agent with synergistic curing effect in the foaming process, the problem of mismatch between the decomposition of resin gel and foaming agent is solved, by adding boron novolac epoxy resin graft-modified graphene oxide to epoxy foam, reduces cell size, strengthens cell walls, promotes the formation of stable graphitized carbon layers on the surface of epoxy foams in flames, reduces the thermal conductivity, and prepares epoxy foam material that integrates the functions of compression resistance, heat insulation and flame resistance.