▎ 摘　　要

NOVELTY - Nanoparticle wall material-doped metal phase-change microcapsule, comprises metal particles as the core material, which is covered with a hybrid inorganic wall material layer doped with nanoparticles, and a thermal expansion cavity between the core material and the hybrid inorganic wall material layer doped with nanoparticles, where the thermal expansion cavity is coated with a layer of organic wall material through the core material, and coated with a layer of hybrid inorganic wall material doped with nanoparticles, heat treating the organic matter in the organic wall material layer to decompose into gas and escape through the hybrid inorganic wall material layer doped with nanoparticles. USE - Used as nanoparticle wall material-doped metal phase-change microcapsule. ADVANTAGE - The microcapsules reduces its supercooling degree, improves the thermal conductivity and realizes the synergistic regulation of supercooling and heat conduction of metal phase change microcapsule, and its thermal cycle performance is good, has good heat storage and temperature control performance, and has good application prospects in the fields of new energy utilization, electronic heat dissipation, and waste heat recovery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the microcapsule, comprising (1): weighing solvent, directly adding organic matter and metal particles in the organic wall material layer, coating directly by magnetic stirring, mechanical stirring or ultrasound, obtaining metal phase-change microcapsules coated with an organic wall material layer, or, taking solvent, adding organic monomers and metal particles in the organic wall material layer, and adding initiator to promote monomer polymerization, and the reaction takes place under the assistance of magnetic stirring, mechanical stirring or ultrasound, washing, filtering and drying to obtain metal phase-change microcapsules coated with an organic wall material layer, (2) weighing solvent, adding nanoparticles, and uniformly dispersing and suspending in the solvent by means of ultrasound to obtain a nanoparticle suspension, adding inorganic source to assist the reaction through magnetic stirring, mechanical stirring or ultrasonic, adding the metal phase change microcapsules coated with the organic wall material layer, ;adding catalyst or initiator, reacting for a period of time, washing, filtering, and drying to obtain a metal phase-change microcapsule whose outer layer is a hybrid inorganic wall material layer doped with nanoparticles and whose inner layer is an organic wall material layer, (3) placing the metal phase change microcapsules in an atmosphere furnace and passing nitrogen gas, setting the temperature at 300-500℃ for heat treatment, decomposing the organic matter in the organic wall material layer into gas by heat and escapes through the hybrid inorganic wall material layer doped with nanoparticles, constructing the thermal expansion cavity, and obtaining nanoparticle wall material-doped metal phase change microcapsules with thermal expansion cavity.