▎ 摘　　要

NOVELTY - Preparing phase change microcapsule type heat absorbing agent useful for cementing slurry, comprises: (i) adding amino group into nano silica using a modifier to obtain modified silica; (ii) dissolving modified silica and graphene oxide in water to obtain silica-graphene oxide solution; (iii) adding the prepared wall pre-polymer into silica-graphene oxide solution and reacting to obtain nano-material modified pre-polymer solution; (iv) preparing core material low melting paraffin emulsion; and (v) heating and stirring in a constant temperature water bath at 40 degrees C, drop-wisely adding the modified prepolymer solution into the low melting paraffin emulsion, adjusting the pH of the system to 3-4, heating to 65 degrees C, adding curing agent solution, cooling, washing, suction filtering, vacuum drying and crushing. USE - The method is useful for preparing phase change microcapsule type heat absorbing agent. ADVANTAGE - The heat absorbing agent overcomes the defect by phase change material.