Microcapsule phase change material and preparation method thereof

Abstract

The invention provides a microcapsule phase change material. The microcapsule phase change material comprises a core material, wherein a wall material is arranged on the outer side of the core material; aluminum nanoparticles and graphite nanoparticles are contained in both the core material and the wall material. The invention further provides a preparation method of the microcapsule phase change material. The preparation method comprises the following steps: weighing the core material and the wall material; preparing a mixture of the aluminum nanoparticles and the graphite nanoparticles; determining the composite content of the nanoparticles; preparing a composite solution of the core material; preparing a composite solution of a first wall material; moulding a microcapsule; washing and drying the microcapsule. According to the microcapsule phase change material provided by the invention, three characteristics are improved at the same time by adding the composite aluminum and graphite nanoparticles into the core material and the wall material, namely the particle density of the microcapsule phase change material is adjusted, the thermal conductivity is increased, and the overcooling degree is reduced; the microcapsule phase change material which contains the composite aluminum and graphite nanoparticles and has high density, high thermal conductivity and low overcooling degree is obtained.

Description

technical field

[0001] The invention belongs to the field of materials science and relates to a phase change material, in particular to a microcapsule phase change material and a preparation method thereof. Background technique

[0002] Microcapsule phase change material particles refer to novel material particles that encapsulate phase change materials in a dense and elastic polymer shell through microcapsule preparation technology. The particle size is usually in the range of 1 μm–1000 μm, which has been reported Smaller particle sizes are possible. The phase change microcapsule suspension is a suspension formed by dispersing the prepared microcapsule phase change material particles in a single-phase fluid (such as water, heat transfer oil, etc.).

[0003] Research on microcapsule technology began in the 1930s and achieved significant results in the 1950s. Throughout the development process, research in the United States has always been in a leading position, and Japan...

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