▎ 摘　　要

NOVELTY - High enthalpy value aqueous heat-conducting phase change material comprises paraffin, melamine, ethanol mixture, 10-30 wt.% aqueous polyurethane resin, 10 wt.% heat conducting filler and polyethylene terephthalate release film. The mixture of paraffin, melamine and ethanol is mixed and wrapped to make 70-90% paraffin capsules and the proportion of the paraffin capsules is 70-90%. USE - Used as high enthalpy value aqueous heat-conducting phase change material. ADVANTAGE - The high enthalpy value aqueous heat-conducting phase change material has overall compatibility and improved performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing high enthalpy value aqueous heat-conducting phase change material, comprising (i) taking paraffin, melamine, ethanol mixture, 10-30 wt.% aqueous polyurethane resin, 10 wt.% heat conducting filler and polyethylene terephthalate release film; (ii) vaporizing different grades of paraffins with different melting points of 35-70℃ into micro-particles with a size of 1-10 µm, where at low temperatures, paraffins appear in a solid state, wrapping in a mixture of melamine and ethanol, making it an eggshell-coated paraffin wax, the thickness of the coating layer varies from 30-100 nm and drying at a high temperature of about 80 degrees to present a microsphere shape; (iii) mixing the aqueous polyurethane resin with a solid content of about 30-25% uniformly with the paraffin capsule at room temperature, stirring speed is lower than 8000cps, stirring for 30 minutes or more to mix well, stirring the capsules with a solid content ratio of 70-90% and the polyurethane solid-containing resin of 10-30%, 10% adding heat conducting fillers within 10% with particle size of 500nm-1 µm thus using alumina, boron nitride and aluminum nitride or graphene together to make a slurry; (iv) coating the above slurry evenly on the polyethylene terephthalate release film by a coating machine blade to form a wet film ranging from 0.1-0.5 thus makes a semi-cured film-like sheet through a 120℃ high-temperature oven for about 30 minutes; and (v) making the above-coated semi-cured roll-shaped sheet into a high-density filling sheet through a high-temperature pressing machine for secondary compaction at 110℃ for 3-5m/min, and 200-500Kpa.