▎ 摘　　要

NOVELTY - Preparing high heat insulation and high pressure resistant low density heat-resistant composite epoxy foam involves placing the graphene oxide in organic dispersant for ultrasonic treatment for 1-2 hours, slowly adding mixed solution of diisocyanate and organic metal catalyst, place the mixed solution under an anhydrous airtight condition for constant temperature reaction for 48-72 hours, then filter and dry to obtain modified graphene oxide. The modified graphene oxide is added into the organic dispersant for ultrasonic treatment for 1-2 hours to obtain modified graphene oxide dispersion liquid. The system mixed with epoxy resin and organic metal catalyst is added slowly, treated with ultrasonic mechanical stirring to obtain the foaming precursor of epoxy resin-diisocyanate-graphene oxidetriune. USE - Method for preparing high heat insulation and high pressure resistant low density heat-resistant composite epoxy foam. ADVANTAGE - The method solves the problem of cell structure defects in the current traditional preparation methods of epoxy foam, and the difficulty of further improving the heat resistance and compressive strength of epoxy foam. DETAILED DESCRIPTION - Preparing high heat insulation and high pressure resistant low density heat-resistant composite epoxy foam involves placing the graphene oxide in organic dispersant for ultrasonic treatment for 1-2 hours, slowly adding mixed solution of diisocyanate and organic metal catalyst , place the mixed solution under an anhydrous air tight condition for constant temperature reaction for 48-72 hours, then filter and dry to obtain modified graphene oxide. The modified graphene oxide is added into the organic dispersant for ultrasonic treatment for 1-2 hours to obtain modified graphene oxide dispersion liquid. The system mixed with epoxy resin and organic metal catalyst is added slowly, treated with ultrasonic mechanical stirring to obtain the foaming precursor of epoxy resin-diisocyanate-graphene oxidetriune. The foaming precursor and amine curing agent according to epoxy and amino mol ratio of 1:0.8-1.0 ultrasonic mechanical stirring process, placed in the 120-140 times for a certain time, when the pre-reaction system viscosity reaches the initial viscosity of 2-4 times, quickly reduce the temperature to 90-110 degrees C, add foaming agent, surfactant, toughening agent component, ultrasonic stirring treatment to obtain the mixed foaming system. The curing-foaming comprises mass ratio of foaming agent, surfactant, and toughening agent is 10-15:0.6-1:5-10; 4. The mixed system id poured into the mold, and then carry out gradient heating and solidification, and finally a high heat insulation, high pressure resistance, low density and heat resistance composite epoxy foam is produced.