▎ 摘　　要

NOVELTY - Preparing graphene waterproof and cooling architectural coating comprises (i) heating kaolin to 800-900 degrees C at the rate of 5-8 degrees C/minute for 2 hours, and cooling with the furnace temperature to prepare metakaolin, (ii) ball milling the metakaolin obtained in step (i) in planetary ball mill to a particle size less than or equal to 75 mu m, (iii) mixing the metakaolin powder, sodium silicate, and water obtained from step (ii) at a mass ratio of 50:10-20:30-40, using a high-speed mixer to stir for 10-20 minutes at a rate of 3000 revolutions per minute to prepare a geopolymer slurry, (iv) mixing the geopolymer slurry and building emulsion obtained from step (iii) at a mass ratio of 1:1, and using a high-speed mixer to stir at a rate of 400 revolutions per minute for 30-60 minutes to prepare a geopolymer-building emulsion composite base material, and (c) adding dispersant, defoamer, anti-mold agent, film-forming aid, cellulose ether, and graphene to the geopolymer-building emulsion composite base material. USE - The method is useful for preparing graphene waterproof and cooling architectural coating. ADVANTAGE - The method: improves weather resistance of the coating, durability and water resistance, and infrared emission rate of the coating layer; and realizes excellent energy-saving and waterproof effect. DETAILED DESCRIPTION - Preparing graphene waterproof and cooling architectural coating comprises (i) heating kaolin to 800-900 degrees C at the rate of 5-8 degrees C/minute for 2 hours, and cooling with the furnace temperature to prepare metakaolin, (ii) ball milling the metakaolin obtained in step (i) in planetary ball mill to a particle size less than or equal to 75 mu m, (iii) mixing the metakaolin powder, sodium silicate, and water obtained from step (ii) at a mass ratio of 50:10-20:30-40, using a high-speed mixer to stir for 10-20 minutes at a rate of 3000 revolutions per minute to prepare a geopolymer slurry, (iv) mixing the geopolymer slurry and building emulsion obtained from step (iii) at a mass ratio of 1:1, and using a high-speed mixer to stir at a rate of 400 revolutions per minute for 30-60 minutes to prepare a geopolymer-building emulsion composite base material, and (c) adding dispersant, defoamer, anti-mold agent, film-forming aid, cellulose ether, and graphene sequentially to the geopolymer-building emulsion composite base material, stirring at 400 revolutions per minute for 10-20 minutes, adding hollow glass beads and stirring at low speed for 20-30 minutes to obtain the finished product.