Heat conduction enhanced heat energy storage shape-stabilized phase-change composite material and preparation method thereof

Abstract

The invention relates to the technical field of phase change materials, in particular to a heat conduction enhanced heat energy storage shape-stabilized phase-change composite material and a preparation method thereof. The heat conduction enhanced heat energy storage shape-stabilized phase-change composite material is prepared from an organic phase change material and a foam frame structure material, and the foam frame structure material is prepared from a polymer and a two-dimensional lamellar material. The two-dimensional lamellar material is assembled into the porous foam frame structure material, so that a heat conduction path can be constructed from a small amount of the two-dimensional lamellar material, and is taken as the framework of the phase change composite material; and the organic phase change material is introduced into the framework, so that the shape stability of the phase change material can be improved, and the heat conduction performance of the phase change materialcan be better enhanced by the effective heat conduction path. Therefore, the heat conduction enhanced heat energy storage shape-stabilized phase-change composite material has the advantages of high phase change enthalpy value, good heat transfer performance, good shape stability and small volume change before and after solid-liquid phase change.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a thermal energy storage shape-changing composite material with enhanced heat conduction and a preparation method thereof. Background technique [0002] Due to the energy crisis and the growing environmental issues, sustainable and renewable energy sources have attracted widespread attention. Due to their high energy storage density and small temperature changes, phase change materials have become important thermal energy storage materials, which effectively reduce the mismatch between energy supply and demand in time and space. Therefore, phase change materials are of great value in many fields. [0003] However, since the widely used phase change materials are organic phase change materials, they generally have poor thermal conductivity, which limits the application of phase change energy storage technology. At the same time, the volume of organic phase change m...

AI Technical Summary

Problems solved by technology

In the above technology, the MXene nanosheets and organic phase change materials are directly and evenly mixed in order to endow the phase change composite materials with light-to-heat conversion performance, but the problem of thermal conductivity of the phase change materials has not been solved. At the same time, due to the The addition amount of the material is large, and the phase change enthalpy of the material also drops sharply.

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