Double-layer coating solid inorganic phase change material micro-capsule and preparation method thereof

Abstract

The invention discloses a double-layer coating solid inorganic phase change material micro-capsule and a preparation method thereof. The double-layer coating solid inorganic phase change material micro-capsule is prepared from the following methods of: firstly, with polymethyl methacrylate as an inner layer wall material and the solid inorganic phase change material as a core material, preparing a single-layer coating solid inorganic phase change material micro-capsule by a phase separation method; and then with polystyrene as an outer layer wall material and the prepared single coating solid inorganic phase change material micro-capsule as the core material, preparing the double-layer coating solid inorganic phase change material micro-capsule by the phase separation or a solvent evaporation method. The double-layer coating solid inorganic phase change material micro-capsule is simple in preparation method, the phase change temperature can be adjusted between 30 DEG C and 60 DEG C, and the enthalpy of phase change is up to 150kJ / kg at the most; by the double-layer coating, the strength of the solid inorganic phase change material micro-capsule is effectively enhanced and the problems of percolation and corrosion of the core material solid inorganic phase change material are solved.

Description

technical field [0001] The invention relates to a double-coated solid inorganic phase-change material microcapsule and a preparation method thereof, specifically a polymethyl methacrylate as an inner wall material, polystyrene as an outer wall material, and a solid The invention discloses a method for preparing solid inorganic phase-change material microcapsules in which the inorganic phase-change material is the core material. Background technique [0002] Solid inorganic phase change materials are mainly some crystalline hydrated salts, such as calcium chloride hexahydrate, sodium sulfate decahydrate, sodium carbonate decahydrate, sodium hydrogen phosphate dodecahydrate, sodium thiosulfate pentahydrate or sodium acetate trihydrate. It is usually an important class of phase change materials for medium and low temperature energy storage. It has the advantages of wide application range, relatively cheap price, large thermal conductivity, large latent heat, large volume heat s...

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a dual Layer encapsulation improves solid inorganic phase change material microcapsules

The double-layer coated solid inorganic phase change material microcapsules, during the phase change process, the inner core undergoes a solid-liquid phase change, while the outer polymer film remains solid, so the solid inorganic phase change material behaves macroscopically. It is a solid particle, thus solving the problem of liquid leakage and pollution of the environment during the solid-liquid phase transition process