A kind of nanocapsule phase change material and preparation method thereof

Abstract

The invention relates to a nanocapsule phase-change material and a preparation method thereof. The preparation method comprises the following steps of: mixing phospholipid and an organic phase-changematerial in a solvent to coat the organic phase-change material with the phospholipid to form liposome nanocapsules, so as to obtain a suspension of the liposome nanocapsules; adding a biomimetic silication inducer solution to the suspension of the liposome nanocapsules to attach a biomimetic silication inducer to the liposome nanocapsules, so as to form a suspension of a preform; and adding a silicon source to the suspension of the preform to form silicon oxide on the surface of the perform, so as to obtain a nanocapsule phase-change material. The nanocapsule phase-change material is a spherical particle comprising a capsule wall, a coating layer and a capsule core, wherein the coating layer is disposed between the capsule wall and the capsule core, the material of the capsule wall is silicon oxide, the material of the capsule core is an organic phase-change material, the coating layer is made from phospholipid, and a biomimetic silication inducer is attached to the surface, facing the capsule wall, of the coating layer. The nanocapsule phase-change material obtained by the method of the invention has excellent capsule formation performance and high loading capacity.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage materials, in particular to a nanocapsule phase change material and a preparation method thereof. Background technique [0002] At present, physical adsorption, vacuum infiltration, melt blending and other methods are usually used for the preparation of shaped phase change materials. However, the shape-fixed phase change materials prepared by the above traditional methods still have defects such as low phase change enthalpy, poor thermal conductivity and thermal stability, which cannot meet the needs of actual production. Using nanocapsule technology to encapsulate phase change materials, preparing stable nanocapsulated heat storage particles, and developing novel and efficient shape-fixed phase change materials are one of the important ways to solve the above problems. [0003] Among them, silicon oxide has the advantages of good thermal conductivity, low density, excellent f...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of poor encapsulation and low loading capacity in preparing nanocapsule phase change materials in the prior art using silicon dioxide as a wall material, the present invention provides a nanocapsule phase change material and a preparation method thereof. The preparation process of the method is Simple, mild conditions, non-toxic, the prepared nanocapsule phase change material has excellent encapsulation performance and high loading capacity

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