▎ 摘　　要

NOVELTY - The method involves (i) weighing network supporting structure, soluble salt and high heat-conducting filler, mixing the soluble salt and the network supporting structure, adding water, dispersing the high heat conducting filler in the mixed solution, heating and forming granular high heat-conducting network precursor; (ii) mixing and stirring hydraulic gel material and high heat-conducting network precursor, adding water to form slurry, gradually adding slurry into the oil continuous phase, gradually raising the temperature, reacting, filtering, washing and drying to obtain the hydraulic gel material shell; (iii) dipping the hydraulic gel material shell in the phase change material, filtering, washing and drying to obtain the phase change energy storage microsphere; and (iv) placing the phase change energy storage microsphere in the ion type surfactant, adding surface synergistic shell layer material, filtering, washing and drying to obtain the phase change energy storage microsphere. USE - The method for preparing phase change energy storage microsphere is used for building. ADVANTAGE - The phase change energy storage microsphere has low cost and high latent heat, high heat conductivity coefficient and excellent performance characteristics of high strength, the high-strength phase change energy storage microsphere shell provides foundation for excellent mechanical property, the use of phase change material inner core with different phase change temperature broadens the application range, the new surface synergistic design excites the activity of phase change energy storage microsphere in the gelling material hydration reaction and improves the phase change energy storage microsphere thermal conductivity. DETAILED DESCRIPTION - The method involves (i) weighing network supporting structure, soluble salt and high heat-conducting filler, mixing the soluble salt and the network supporting structure, adding water and continuously stirring to completely dissolve the soluble salt and the network supporting structure, dispersing the high heatconducting filler in the mixed solution, heating and continuously stirring until the water in the mixed solution is completely evaporated, forming granular high heat-conducting network precursor, where the network supporting structure is wood cellulose, sodium polyacrylate or sodium alginate, the soluble salt is sodium chloride, sodium sulfate or calcium chloride, the high heat-conducting filler is carbon powder, graphene or graphene 2; (ii) weighing hydraulic gel material and high heat-conducting network precursor, mixing and stirring and adding water to form slurry, gradually adding slurry into the oil continuous phase and continuously stirring, gradually raising the temperature of the oil continuous phase to 50-80℃ at the heating rate of 5-10℃/minute, after reacting, filtering, washing, drying to obtain the hydraulic gel material shell, where the hydraulic gel material is silicate cement, sulfate aluminum cement, magnesium phosphate cement, gypsum or waste alkali excitation material, the waste alkali excitation material is composed of solid waste and alkali excitant, the alkali excitant is sodium hydroxide solution, sodium carbonate solution, sodium metasilicate solution, potassium hydroxide solution, potassium carbonate solution or potassium metasilicate solution, the mass ratio of silicon oxide and aluminum oxide is 0.8-2.2, the mass ratio of sodium oxide or potassium oxide and aluminum oxide is 0.5-1.5, the mass ratio of water to sodium oxide or potassium oxide is 15-19 to determine the dosage of alkali excitant, and the oil continuous phase is carbon tetrachloride, polyethylene glycol or paraffin; (iii) dipping the hydraulic gel material shell in the phase change material at 50-80℃ for 1-5 hours, filtering, washing, drying to obtain the phase change energy storage microsphere, where the phase change material is paraffin, fatty acid, lauric acid, capric acid, polyethylene glycol disodium hydrogen phosphate, sodium carbonate decahydrate and calcium chloride hexahydrate and/or eutectic; and (iv) placing the phase change energy storage microsphere in the ion type surfactant, adding surface synergistic shell layer material and stirring, filtering, washing, drying to obtain the phase change energy storage microsphere, where the mass ratio of the ionic type surfactant and phase change energy storage microsphere is 0.01-0.1, the mass ratio of the surface synergistic shell layer material to the phase change energy storage micro-sphere is 0.005-0.1, the surface synergistic shell layer material is nano silicon dioxide or nano calcium carbonate, the ionic surfactant is hexadecyl ammonium bromide aqueous solution with mass fraction of 1%, dodecyl benzene sulfonic acid aqueous solution, fatty alcohol acyl sodium sulfate aqeous solution, ethoxylated fatty acid methyl ester sodium sulfonate aqueous solution and/or secondary alkyl sodium sulfonate aqueous solution.