Preparation method of fluorescence phase-change material

Abstract

The invention relates to a preparation method of a fluorescence phase-change material, and belongs to the field of composite phase-change materials. The method comprises the steps of firstly, at roomtemperature, utilizing soluble alkali and organic ketone or aldehyde for carrying out Aldol reaction, and preparing CQDs powder through adjusting types and contents of cross-linking agents; secondly,dispersing a certain mass of the CQDs powder into a solvent containing soluble metal salt and an organic carboxylic acid ligand, stirring at room temperature, reacting at 25 to 250 DEG C for 2 to 36h,filtering and washing for multiple times, and drying in a drying oven to obtain an MOFs / CQDs porous carrier material; finally, adopting a solution impregnation method for preparing a soluble phase-change core material into a solution, dispersing the prepared MOFs / CQDs carrier material into the prepared phase-change material solution, utilizing a pore-passage structure of MOFs / CQDs for adsorbing and limiting the phase-change core material in a pore passage, and drying at the temperature higher than the phase-change temperature to obtain a MOFs / CQDs-based fluorescence phase-change material. According to the material provided by the invention, the selection of core materials is diverse, leakage and corrosion can be effectively prevented, the pore-passage structure is adjustable, and the fluorescence phase-change material is enable to have a favorable heat performance of the phase-change material, and also has a multicolor fluorescence function.

Description

technical field [0001] The invention belongs to the field of nanocomposite phase-change materials, and in particular relates to a preparation method of a novel fluorescent phase-change material. Background technique [0002] Phase change materials (Phase Change Materials, PCMs) use the phase change process of materials to absorb and store the heat of the environment, and release the heat when needed, which can effectively solve the imbalance between the supply and demand of space-time heat energy. At present, solid-liquid phase change materials are the most widely used type of phase change materials, and the research directions mainly focus on packaging technology, heat storage performance, heat transfer performance and so on. Encapsulation mainly solves the serious leakage problem of traditional solid-liquid phase change materials. Generally, the surface tension, capillary force or hydrogen bond force of porous material channels can effectively immobilize the phase change c...

AI Technical Summary

Problems solved by technology

Heat storage and heat transfer are the most popular research directions. Heat storage usually supports organic and inorganic phase change core materials with appropriate phase change enthalpy and phase change temperature. Heat transfer usually improves the performance of phase change materials by adding various high thermal conductivity materials. Heat transfer performance, such as high thermal conductivity metal particles silver, graphene, carbon nanotubes, carbon fibers, etc., but at the expense of greatly sacrificing thermal energy storage capacity

In addition, the application of traditional composite phase change materials mainly focuses on the thermal management of building materials. However, in this era of pursuing diversification of material structures and functions, simply studying the basic thermal properties of phase change materials is far from meeting actual needs. , it is imperative to develop multifunctional composite phase change materials to meet more functional requirements

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