Composite amorphous phase-change heat storage material and preparation method thereof

The invention relates to a composite amorphous phase-change heat storage material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is prepared from a porous material used as a support material and an inorganic hydrous salt used as a phase-change material in manners of absorbing the inorganic hydrous salt into a porous structure of the support material by virtue of the capillary adsorption action of the porous material, and self-assembly of a surfactant. The method comprises the following steps: firstly, emulsifying and dispersing the molten inorganic hydrous salt phase-change material such as calcium chloride hexahydrate by the emulsifying dispersion effect of the surfactant under an ultrasonic condition, so as to form a stable emulsion; adding expanded graphite to the emulsion to evenly disperse; putting the mixture into a vacuum oven, vacuumizing and keeping in a constant state for 30 minutes at room temperature, so as to prepare a novel composite amorphous phase-change heat storage material which is high in phase-change latent heat, good in heat-conducting property, and low in cost.