Reversible thermochromic functional composite phase change material as well as preparation method and application thereof

Abstract

The invention provides a reversible thermochromic functional composite phase change material which is prepared by the following steps: by taking crystal violet lactone, bisphenol A, stearyl alcohol and an olefin block copolymer OBC as raw materials, firstly melting and blending the crystal violet lactone, the bisphenol A and the stearyl alcohol to obtain a reversible thermochromic blend; and carrying out hot press molding on the reversible thermochromic blend and the olefin block copolymer OBC by adopting a hot press method, and naturally cooling to obtain the reversible thermochromic functional composite phase change material which has both the reversible thermochromic function and the phase change function and has the difference between the reversible thermochromic temperature and the phase change temperature less than 5 DEG C. The thermochromism process is a reversible process, crystal violet lactone provides a color-changing color base, bisphenol A causes thermochromism, and stearyl alcohol serves as a cosolvent to adjust the color-changing temperature. The preparation method has the advantages that the phase change material stearyl alcohol is used as a connecting bridge of a color change system and a phase change system, reversible thermochromism and phase change temperature are adjusted, and the phase change heat storage material has the phase change heat storage performance and the photothermal conversion performance at the same time.

Description

technical field [0001] The invention belongs to the technical field of reversible thermochromic functional composite phase change materials, and particularly relates to a reversible thermochromic functional composite phase change material and a preparation method and application thereof. Background technique [0002] In recent years, with the development of the economy, the problem of environmental pollution has gradually increased, and the energy crisis has become increasingly prominent. It is imminent to find efficient and environmentally friendly energy storage devices. Phase change materials, as a kind of efficient thermal energy storage methods, can absorb the heat of the environment and release heat to the environment when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment. It has been used in solar energy utilization, waste heat recovery, intelligent air-conditioning buildings, agricultural greenhouses, battery thermal m...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a reversible thermochromic functional composite phase-change heat storage material and a preparation method thereof. The raw materials used in the phase-change material are green and safe, and the cost is low. The combination of phase change materials, temperature triggers the phase change process and color change process at the same time, which effectively solves the problems in the prior art such as no color memory function, poor shape-setting packaging effect and poor reversible color stability.

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