▎ 摘　　要

NOVELTY - Preparing thermal conductive buffer material comprises (i) mixing bentonite and water at a mass ratio of 1:5-1:10, and then ultrasonically dispersing to obtain dispersion, adding 3-5% silane coupling agent modified nano-silica, heating and stirring the reaction, filtering, washing and drying to obtain modified bentonite, (ii) mixing sodium polystyrene sulfonate and graphene oxide dispersion at a mass ratio of 1:8-1:10, stirring, adding alloy powder, ultrasonic dispersing, suction filtrating, washing, and drying to obtain modified graphene oxide, and (iii) mixing 100-150 pts. wt. modified bentonite, 10-20 pts. wt. sepiolite, 10-20 pts. wt. spherical quartz powder, 20-30 pts. wt. modified graphene oxide and 20-30 pts. wt. sodium polyacrylate, stirring and discharging to obtain final product. USE - The buffer material is useful for radioactive waste in nuclear industry (claimed). ADVANTAGE - The buffer material: has excellent water barrier and chemical barrier function.