Medium-temperature phase-change heat storage material and preparation method thereof

Abstract

The invention relates to a medium-temperature phase-change heat storage material and a preparation method thereof. The medium-temperature phase-change heat storage material is composed of the following components in percentage by weight: 80-90% of adipic acid, 5-10% of rare-earth oxide, 5-10% of graphene and adhesive which accounts for 3 wt% of the sum of adipic acid, rare-earth oxide and graphene. The preparation method comprises the following steps: (1) weighing the raw materials of the medium-temperature phase-change heat storage material according to the weight percentage; (2) mechanically mixing the adipic acid, rare-earth oxide and graphene uniformly, adding into a crucible, putting in a vacuum drying oven, and carrying out melt adsorption at 150-160 DEG C for 6 hours; and (3) doping the adhesive, and carrying out pelleting forming to obtain the medium-temperature phase-change heat storage material. The simple technique for preparing the medium-temperature phase-change heat storage material has the advantage of short production cycle; and the prepared phase-change heat storage material has favorable heat-conducting property and heat stability.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and relates to a medium-temperature phase-change heat storage material which uses adipic acid as a heat storage material, rare earth oxides as a modifier, and graphene as a heat conduction enhancing material and a preparation method thereof. Background technique [0002] Heat storage technology uses the conversion of internal energy in materials to collect, store and release heat energy, and then realize the reasonable regulation of heat energy supply and demand. Phase change materials can be divided into four types according to the basic form of material phase transition in the working process: solid-gas, liquid-gas, solid-solid and solid-liquid phase change materials. Among them, solid-liquid phase change materials use the heat absorption and heat release phenomena in the melting and solidification of substances to realize the storage and release of heat energy. During the sol...

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Problems solved by technology

[0005] Although scholars in related fields have conducted a series of research on organic heat storage materials, in fact, in order to make organic heat storage materials can be used on a large scale, the high temperature heat resistance performance, especially the heat resistance performance after multiple thermal cycles must be improved. Improvement is extremely important, and the general method is to introduce heat-resistant groups into the molecular structure. This method is complicated in process, extremely high in cost, and difficult to be popularized and applied on a large scale. Therefore, the problem of heat resistance has not been effectively solved so far.

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